2016 Chevrolet Silverado 1500 TSBs

Dealers are to suspect/monitor the crankshaft position sensor.

internal engine damage.

repair attempts that are being performed on customers vehicles that exhibit vibration conditions without utilizing the support of General Motors Technical Assistance Center. If valid vibration frequency or Road Force Variation data has been collected and a repair attempt does not correct the customer complaint, contact General Motors Technical Assistance Center for further support. For any vehicles that remains unrepaired after being at the dealer for three days or more and a related bulletin or PI is not found, contact General Motors Technical Assistance Center for further support.

engine related shudder.

caliper piston area found during a service of the vehicle. The substance is actually excess assembly grease from the caliper boot and piston.

noise and is difficult to identify, isolate or pinpoint. Technician should get record a sound clip or take a video of the noise for assessment by engineering. Technician will need to call General Motors Technical Assistance Center for further assistance.

and Oil Tank if the engine was replaced where large amounts of debris has flowed throughout the oiling system.

caliper piston area found during a service of the vehicle. The substance is actually excess assembly grease from the caliper boot and piston installation. This grease can be cleaned off and the rest of the service completed.

parts or defects in the castings, that may be the cause of the concerns related to the MIL or the engine running rough.

GDS 2.

issue.

test probe, replacement terminals, and terminated leads. The J-35616-64B is the latest test probe released for checking tension or probing the .64 series terminals. The test probe terminal has been released in the terminal repair kit (J-38125-620H) located in Lear Tray 7 part number 963716-2. There are 5 terminated leads in a package part number is 13505346, which can be ordered through your normal General Motors Customer Care and Aftersales parts channel.

Panel Cluster, Radio, and Heater-Vent-Air Conditioning display blanks out, Bluetooth phone or Pandora connection dropped, the radio station or volume changes when operating the snow plow. Please advise the customer that engineering is aware of this concern and working on this issue.

consumption.

Dealers for Engine and Transmission Assembly Replacement Under Warranty, Policy or Customer Enthusiasm and information on Submission of Warranty Transaction in Global Warranty Management.

personnel as a guideline to perform necessary engine repairs and prevent unnecessary engine replacement.

rear wheel drive valve bodies.

rear wheel drive valve bodies.

factory Integrated Trailer Brake Control be bypassed and their aftermarket trailer brake controller be installed instead. Technician will need to gain access to the body harness. Install trailer brake controller harness General Motors part number 23184088 into Middle Bus Electrical Center (X61A).

Before calling General Motors Technical Assistance Center technician will need to have high and low pressures, outside temperature, humidity, and vent temperature.

Before calling General Motors Technical Assistance Center technician will need to have high and low pressures, outside temperature, humidity, and vent temperature.

General Motors will only support a tire calibration for tires that have been sized, tested and designed for the vehicle in question and its applications. Technician should not use the information that is provided by the antilock braking system tire size selection.

tech did not properly prepare the engine block from dirt and debris in bolt holes or if found that the block was damaged by the tech.

service or aftermarket calibrations.

GDS 2.

consumption.

hard to start and/or stalls and Malfunction Indicator Lamp (MIL) is illuminated that may be caused by gelling of fuel in cold temperatures.

occurrence.

This is the result of hooking up the Active Fuel Injector Tool incorrectly on vehicles equipped with a direct fuel injection system. This Preliminary information instructs the dealer ofa repair kit they received that will prevent this issue when installed correctly.

possibilities of what may happen using the incorrect filter.

conditions of rough idle, Crank no start, extended crank or misfire, MIL with DTCs, and explains how Top Tier fuels should be used to reduce carbon build-up.

GM has determined that wheel refinishing under warranty will no longer be performed.

conductive finish.

parts or defects in the castings, that may be the cause of the concerns related to the MIL or the engine running rough.

conditions of rough idle, Crank no start, extended crank or misfire, MIL with DTCs, and explains how Top Tier fuels should be used to reduce carbon build-up.

caliper piston area found during a service of the vehicle. The substance is actually excess assembly grease from the caliper boot and piston installation. This grease can be cleaned off and the rest of the service completed.

and Oil Tank if the engine was replaced where large amounts of debris has flowed throughout the oiling system.

and improve fuel economy.

service or aftermarket calibrations.

the PQC for engine or transmission assembly replacement and explains the PQC process, GWM Transaction submission, vehicle service record retention and proper handling of assembly returns for Canadian Dealers only.

one of the most challenging complaints to accurately diagnose and repair. Technician will need to use Pico Oscilloscope Diagnostic Kit to effectively diagnosis vehicles. Technician should drive the vehicle will using the Pico Oscilloscope to record data. After the data is recorded it should be reviewed to determine the root cause of the concern. If a repair attempt made the concern better but not eliminated or had no affect at all, and are requesting assistance from General Motors Technical Assistance Center record another Pico file and save it to the computer. After the new Pico Oscilloscope data has been saved email the data to General Motors Technical Assistance Center in the subject line include ?Vibration? ?Business Associate Code? and the last 8 of the Vehicle Identification Number.

housing and to perform testing on transmission for other possible issues, but it still may be possible on high mileage vehicles that orifices in housing may have come dislodged, causing the same customer concern.

Before calling General Motors Technical Assistance Center technician will need to have high and low pressures, outside temperature, humidity, and vent temperature.

Dealers Only).

Recommendations.

consumption.

Dealers Only).

possibilities of what may happen using the incorrect filter.

personnel as a guideline to perform necessary engine repairs and prevent unnecessary engine replacement.

tech didn't properly prepare the engine block from dirt and debris in bolt holes or if found that the block was damaged by the tech.

service or aftermarket calibrations.

hard to start and/or stalls and Malfunction Indicator Lamp (MIL) is illuminated that may be caused by gelling of fuel in cold temperatures.

GDS 2.

engine related shudder.

consumption.

driveability concerns and/or MIL ON due to aftermarket oil bath air filter use.

vehicle comes in with misfire and DTC Codes P0300 - P0308 and/or P050D

Panel Cluster, Radio, and Heater-Vent-Air Conditioning display blanks out, Bluetooth phone or Pandora connection dropped, the radio station or volume changes when operating the snow plow. Please advise the customer that engineering is aware of this concern and working on this issue.

issue.

issue.

personnel as a guideline to perform necessary engine repairs and prevent unnecessary engine replacement.

service or aftermarket calibrations.

internal engine damage.

Dealers Only).

customers concern of engine misfire, ticking noise and/or MIL Illuminated.

may have no Reverse and no 2nd gear.

customers concern of engine misfire, ticking noise and/or MIL Illuminated.

issues in very cold ambient temperatures. To allow the ice to melt so that it can be drained from the related components. That any of the listed DTC's may set with or without poor engine performance.

Assistance Center may ask for Global Diagnostic System 2 Session Log. Technician will need use Global Diagnostic System 2 to send the session logs to General Motors Technical Assistance Center for further assistance on the vehicle in question.

Assistance Center may ask for Global Diagnostic System 2 Session Log. Technician will need use Global Diagnostic System 2 to send the session logs to General Motors Technical Assistance Center for further assistance on the vehicle in question.

customers concern of engine misfire, ticking noise and/or MIL Illuminated.

personnel as a guideline to perform necessary engine repairs and prevent unnecessary engine replacement.

the PQC for engine or transmission assembly replacement and explains the PQC process, GWM Transaction submission, vehicle service record retention and proper handling of assembly returns for Canadian Dealers only.

housing and to perform testing on transmission for possible other issues, but it still may be possible on high mile vehicles that orifices in housing may have come dislodged, causing the same customer concern.

General Motors will only support a tire calibration for tires that have been sized, tested and designed for the vehicle in question and its applications. Technician should not use the information that is provided by the antilock braking system tire size selection.

gasket(s) has been possibly installed backwards to correct a concern of an Engine Thermostat Tick Noise and/or Running Hot.

Dealers for Engine and Transmission Assembly Replacement Under Warranty, Policy or Customer Enthusiasm and information on Submission of Warranty Transaction in Global Warranty Management.

and Oil Tank if the engine was replaced where large amounts of debris has flowed throughout the oiling system.

gasket(s) has been possibly installed backwards to correct a concern of an Engine Thermostat Tick Noise and/or Running Hot.

hard to start and/or stalls and Malfunction Indicator Lamp (MIL) is illuminated that may be caused by gelling of fuel in cold temperatures.

GDS 2.

Identification.

consumption.

service or aftermarket calibrations.

internal engine damage.

engine is started while diagnosing for noise from the engine or transmission.

which will need to be installed to correct the repair.

Recommendations.

and improve fuel economy.

engine related shudder.

Before calling General Motors Technical Assistance Center technician will need to have high and low pressures, outside temperature, humidity, and vent temperature.

Dealers Only).

noise and is difficult to identify, isolate or pinpoint. Technician should get record a sound clip or take a video of the noise for assessment by engineering. Technician will need to call General Motors Technical Assistance Center for further assistance.

Dealers Only).

or the vehicle has sat for a few hours.

personnel as a guideline to perform necessary engine repairs and prevent unnecessary engine replacement.

engine related shudder.

after swapping an Engine Control Module or other modules from one vehicle to another. The Global Architecture electrical system associated with these vehicles does not allow controller swaps between vehicles.

General Motors will only support a tire calibration for tires that have been sized, tested and designed for the vehicle in question and its applications. Technician should not use the information that is provided by the antilock braking system tire size selection.

and Oil Tank if the engine was replaced where large amounts of debris has flowed throughout the oiling system.

customers concern of engine misfire, ticking noise and/or MIL Illuminated.

GM has established a new process for the way that refinishing under GM Warranty will be handled (U.S. ONLY).

occurrence.

caliper piston area found during a service of the vehicle. The substance is actually excess assembly grease from the caliper boot and piston installation. This grease can be cleaned off and the rest of the service completed.

Assistance Center may ask for Global Diagnostic System 2 Session Log. Technician will need use Global Diagnostic System 2 to send the session logs to General Motors Technical Assistance Center for further assistance on the vehicle in question.

and19368176where the incorrect crankshaft timing gear was installed. Provides dealer with information to correct this condition.

vehicle comes in with misfire and DTC Codes P0300 - P0308 and/or P050D

key option Regular Production Option Code 6E2 or 6E8. Technician will need to check the Regular Production Option Code for 6E2 or 6E8. Technician will need to order the correct key part number per the Regular Production Option Code. Then the technician will need re-code the lock cylinders to match the Regular Production Option Code. Also replace the Body Control Module and normal Service Programming System to the Body Control Module will turn the vehicle to a common key.

may be noisy or vibrate when running. This concern will only occur when the temperatures is below 32 degrees Fahrenheit and if the blower motor is removed while still cold, ice may be found on the blower motor cage. This concern could be caused by water leaking or snow ingestion into the Heater-Vent-Air Conditioning case. Technician is to perform normal water testing diagnostics while the Heater-Vent-Air Conditioning is running, looking for water leaking past the plenum cover. If water is leaking past the cover remove the cover and install a 12x12 snow resistant screen to the fresh air intake. Reseal and install the plenum cover cap using Kent air dry sealer or equivalent.

Technicians shouldrefer to Service Information for information regarding most accessories. Technicians mayalso contact PARTECHand/orthe Techline Customer Support Center for additional support.

and19368176where the incorrect crankshaft timing gear was installed. Provides dealer with information to correct this condition.

(RPO NQH)

(RPO NQH)

Engine Coolant Leaks into Combustion Chamber

bring their vehicle in for this concern, DO NOT proceed with this EI. Some customers may comment on a Service 4WD message displayed. During diagnosis a technician may find DTC C0398 (Range Actuator Position Range Position Correlation). Cause GM Engineering is attempting to determine the root cause of the above condition. Engineering has a need to gather information on vehicles PRIOR to repair that may exhibit this condition. As a result, this information will be used to "root cause" the customer's concern and develop/validate a field fix.

Engine Coolant Leaks into Combustion Chamber

Panel Cluster, Radio, and Heater-Vent-Air Conditioning display blanks out, Bluetooth phone or Pandora connection dropped, the radio station or volume changes when operating the snow plow. Please advise the customer that engineering is aware of this concern and working on this issue.

vehicles that may have a buffeting vibration and/or drone type noise, exhaust tone change, and/or body pressure booming. Replace or repair any of the issue that was found in the inspection.If the vehicle is equipped with a 4.3 liter or 5.3 liter engine an updated exhaust system is now available.

General Motors will only support a tire calibration for tires that have been sized, tested and designed for the vehicle in question and its applications. Technician should not use the information that is provided by the antilock braking system tire size selection.

replace the pistons if found the cause of the oil consumption.

have fishbite, chuggle, misfire,AFM disturbances or torque converter shudder/vibrationconcerns. Technician are advised to use PICO software to determine root cause of the concern. If torque converter shudder is confirmed technicians arereferred toTorque Converter Diagnosis in SI.

Dealers Only).

or the vehicle has sat for a few hours.

The customer communication requested return of unsold inventory to inspect the software. The software may be too sensitive to the position of a locating magnet in the assembly causing the activation of the pinch point threshold prematurely. The window will stay open when it should have closed.

The customer communication requested return of unsold inventory to inspect the software. The software may be too sensitive to the position of a locating magnet in the assembly causing the activation of the pinch point threshold prematurely. The window will stay open when it should have closed.

guideline to perform necessary engine repairs and prevent unnecessary engine replacement.

engine soon malfunction indicator lamp, antilock braking system malfunction indicator lamp, service suspension system message, misfire, hesitation, no crank, heater-vent-air conditioning inoperative. Technician may find F11UA, F104UA, F35UA, and or F60UA blown. Technician should inspect the engine harness near the vacuum pump pulley to be chafing. Technician will need to reroute the wire harness and repair and damaged wires.

has been sheared away to correct a crank/No Start condition.

correct conditions of rough idle, Crank no start, extended crank or misfire, MIL with DTCs, and explains how Top Tier fuels should be used to reduce carbon build-up.

can cause an electrical short which will keep modules from shutting down causing a dead battery and a no crank condition, a crank no start,or unable to program the engine control module. Engine control module will set a diagnostic trouble code of P1682, or the engine will continue to run with the ignition off.

with an engine that runs with an intermittent crank no start with a Diagnostic Trouble Code P0011 or P00C6 current or history. The Camshaft Position Actuator Solenoid Valve may be sticking or binding causing the valve timing to be retarded. Dealer will need to cycle the Camshaft Position Actuator Solenoid Valve by energizing it using Global Diagnostic System 2.

overfull on oil causing an engine vibration concern. The technician is advised to inspect for contaminnants and adjust the engine oil level as needed.

repair vehicles that may have stalling shudder and/or hard shifting into 1st gear or reverse vibration on launch (with excessive crankshaft end play). Technician will test to determine if the crank shaft end play is within specification 0.0015?0.0086 inch. If end play is found to be out of specification, remove engine and inspect for possible crankshaft thrust bearing and/or crankshaft for wear. Inspect thrust bearing for wear on one side and crankshaft on that "mating" surface. If the thrust bearing has three vertical channels worn off replace connecting rod bearings, main bearings, thrust bearing and crankshaft. If working on a Corvette the oil tank with lines and oil cooler are both required to be replaced if equipped

vehicles that may have a buffeting vibration and/or drone type noise, exhaust tone change, and/or body pressure booming. Replace or repair any of the issue that was found in the inspection.If the vehicle is equipped with a 4.3 liter or 5.3 liter engine an updated exhaust system is now available.

driving.

engine oil consumption.

transmission assembly replacement and explains the PQC process, GWM Transaction submission, vehicle service record retention and proper handling of assembly returns.

Certain Vehicles may have a condition where customers may experience increased brake pedal effort, hardbrake pedal, and/or potentially increased stopping distance. The condition is more prevalent at low speed when softly applyingthe brakes. The engine mounted mechanical vacuum pump outputmay decrease over time decreasing the amount of vacuum/power brake assist. Failure to follow recommended oil change intervalscould contribute to this condition. The Driver?s Information Center, (DIC) ?Service brake assist? alert will activate 2-5minutes after the vacuum level drops, and a Diagnostic Trouble Code, (DTC) will also be set. Even where this condition occurs,the hydraulic brake system remains functional but may require additionalpedal force. Please be aware that even if the vehicle exhibits this condition, it meets all federal motor vehicle safety standards forbrake performance. Dealers are to replace the vacuum pump and vacuum pump belt. The repairs will be made at no charge to the customer.

can cause an electrical short which will keep modules from shutting down causing a dead battery and a no crank condition, a crank no start,or unable to program the engine control module. Engine control module will set a diagnostic trouble code of P1682, or the engine will continue to run with the ignition off.

Certain vehicles equipped with special service package (RPO 5W4) and certain 2015 ? 2019 Chevrolet Tahoe vehicles equipped with police package (RPO 9C1) or special service package (RPO 5W4) may have a condition in which frequent, repeated brake applications at low speed or idle speeds can deplete available brake vacuum assist faster than vacuum can be replenished by the system, which can lead to increased brake pedal effort, hard brake pedal and potentially increased stopping distance. These vehicles utilize Hydraulic Brake Boost Assist to supply additional hydraulic pressure when the vacuum boost is not sufficient to achieve the driver?s intended brake force. Dealers will reprogram the Electronic Brake Control Module in these vehicles with a new calibration that will improve how the system utilizes the Hydraulic Brake Boost Assist function when vacuum assist is depleted.

that may have Diagnostic Trouble Code P06DD or no or low oil pressure. Technician will replace timing chain tensioner guide. If oil pump face is damaged and or worn thru replace oil pump. Inspect bearings for damage wear due to debris from oil pump.

replaced and is still within warranty.

which affects fuel injector function. Under certain circumstances one or more of the vehicle?s fuel injectors may deliver an improper amount of fuel to the engine. If this occurs, the Malfunction Indicator Lamp (Check Engine Light) will illuminate, the engine may idle or run rough, and the vehicle may stall. A diagnostic trouble code related to the fuel injector may be set. This special coverage only applies to vehicles in these states: California, Connecticut, Delaware, Maine, Maryland, Massachusetts, New Jersey, New York, Oregon, Pennsylvania, Rhode Island, Vermont, and Washington. Dealers are to replace the fuel injectors as necessary. The repairs will be made at no charge to the customer.

conductive finish.

replace the pistons if found the cause of the oil consumption.

Engine Soon Malfunction Indicator Lamp on. Technician will find Diagnostic Trouble Codes P0340 and P0341 setting at times. Technician should use normal published Service Information diagnostics. If normal Service Information diagnostics does not isolate the concern, inspect for corrosion in connector X154 located on the front cover next to the vacuum pump.

P018B diagnostic trouble codes. The following steps may help to determine if this is caused by a fuel pressure sensor not reading the low end of the pressure range. Technician is to make sure the engine is cold and install the Multiple Diagnostic Interface along with Global Diagnostic System 2. Navigate to fuel system depressurize and at engine idle depressurize the fuel system. The fuel pressure sensor value should drop to 0 and the engine will stall. If a sensor is causing this concern the suspected sensor will not drop to 0 the engine will stall however the sensor will still read 30 to 40 pounds per square inch.

after swapping an Engine Control Module or other modules from one vehicle to another. The Global Architecture electrical system associated with these vehicles does not allow controller swaps between vehicles.

6L80 Regular Production Option Code (MYC), 6L90 Regular Production Option Code (MYD) or 8L90 Regular Production Option Code (M5U) Automatic Transmission, now have Powertrain Grade Braking. Powertrain grade braking assists when driving on a downhill grade to help maintain desired vehicle speed by using the engine and transmission to slow the vehicle.

test probe, replacement terminals, and terminated leads. The J-35616-64B is the latest test probe released for checking tension or probing the .64 series terminals. The test probe terminal has been released in the terminal repair kit (J-38125-620H) located in Lear Tray 7 part number 963716-2. There are 5 terminated leads in a package part number is 13505346, which can be ordered through your normal General Motors Customer Care and Aftersales parts channel.

Assistance Center may ask for Global Diagnostic System 2 Session Log. Technician will need use Global Diagnostic System 2 to send the session logs to General Motors Technical Assistance Center for further assistance on the vehicle in question.

This is the result of hooking up the Active Fuel Injector Tool incorrectly on vehicles equipped with a direct fuel injection system. This Preliminary information instructs the dealer ofa repair kit they received that will prevent this issue when installed correctly.

can cause an electrical short which will keep modules from shutting down causing a dead battery and a no crank condition, a crank no start,or unable to program the engine control module. Engine control module will set a diagnostic trouble code of P1682, or the engine will continue to run with the ignition off.

vehicles that may have a buffeting vibration and/or drone type noise, exhaust tone change, and/or body pressure booming. Replace or repair any of the issue that was found in the inspection.If the vehicle is equipped with a 4.3 liter or 5.3 liter engine an updated exhaust system is now available.

General Motors vehicles can be accessed via the web at http://www.gmstc.com. orhttp://www.nfpa.org/

vehicles that have remote start is inoperative, power lift gate Regular Production Option Code (TB5) is inoperative with the ignition off, Crank no start, Start and Stall, and vehicles equipped with the diesel engine, the blower motor may stay on after the engine is turned off. Technician may find Diagnostic Trouble Code P2537 and/or P129Dset. Technician will need to Use a voltmeter and check circuit 5985 at the Engine Control Module and Transmission Control Module. If no or low voltage is found, use the wiring diagram in Service Information and perform normal circuit diagnosis.

Engine Soon Malfunction Indicator Lamp on. Technician may find Diagnostic Trouble Codes P0106 and P0506. Technician will inspect for a broken valve spring and replace as needed.

Engine Soon Malfunction Indicator Lamp on. Technician may find Diagnostic Trouble Codes P0106 and P0506. Technician will inspect for a broken valve spring and replace as needed.

Engine Soon Malfunction Indicator Lamp on. Technician may find Diagnostic Trouble Codes P0106 and P0506. Technician will inspect for a broken valve spring and replace as needed.

or disable the Bi-Fuel Compressed Natural Gas system. General Motors does not condone the removal of the original equipped Compressed Natural Gas systems.

after swapping an Engine Control Module or other modules from one vehicle to another. The Global Architecture electrical system associated with these vehicles does not allow controller swaps between vehicles.

In some circumstances, some 2014-2017 model year Cadillac Escalade, Chevrolet Silverado, Chevrolet Suburban, Chevrolet Tahoe, GMC Sierra, and GMC Yukon vehicles may have a condition where customers may experience increased brake pedal effort, hard brake pedal, and/or potentially increased stopping distance. The condition is more prevalent at low speed when softly applying the brakes. The engine mounted mechanical vacuum pump output may decrease over time decreasing the amount of vacuum/power brake assist. Failure to follow recommended oil change intervals could contribute to this condition. The Driver?s Information Center, (DIC) ?Service brake assist? alert will activate 2-5 minutes after the vacuum level drops, and a Diagnostic Trouble Code, (DTC) will also be set. Even where this condition occurs, the hydraulic brake system remains functional but may require additional pedal force. Please understand that even if the vehicle exhibits this condition, it meets all federal motor vehicle safety standards for brake performance. Dealers are to replace the vacuum pump and vacuum pump belt. The repairs will be made at no charge to the customer.

eliminate coolant smell and/or a slight leak at the radiator.

intermittent pop noise from the speakers followed by a reset of the radio and clock. Technician will need to check for Diagnostic Trouble Codes and also check the battery for proper cable connections. Dealer should communicate to the customer that we apologize for this inconvenience and that General Motors is working on a solution for this concern.

Trouble Code B101D stored in Telematics Communication Interface Control Module. Technician will use Global Diagnostic System 2 to review the Firmware Over-the-Air version. If the Firmware Over-the-Air version on the scan tool equals 6708 the technician will need to contact General Motors Technical Assistance Center for further assistance. If the Firmware Over-the-Air version on the scan tool is lower than 6708 Dealer can order the part thought the Instrument Sales and Service website process.

Option Code L83, L86, or LV3 may have an oil consumption concern were one quart in 2000 miles is being used. Dealer will confirm oil level was properly checked per Owner’s Manual, and check the bolt torque on the Valve Lifter Oil Manifold Assembly, before doing any repairs to the vehicle.

driving.

General Motors against defects in material or workmanship under the New Vehicle Warranty (in Canada, the Base Warranty Coverage). For vehicles within this warranty period, defective tires will be replaced on a pro rata adjustment basis according to the published distance-based schedule.

If snow and/or ice is present on the active grille air shutters, take pictures and submit through the Field Reporting Process.

eliminate coolant smell and/or a slight leak at the radiator.

repair attempts that are being performed on customer?s vehicles that exhibit vibration conditions without utilizing the support of General Motors Technical Assistance Center. If valid vibration frequency or Road Force Variation data has been collected and a repair attempt does not correct the customer complaint, contact General Motors Technical Assistance Center for further support. For any vehicles that remains unrepaired after being at the dealer for three days or more and a related bulletin or PI is not found, contact General Motors Technical Assistance Center for further support.

installing aftermarket electrical accessories. Dealer should reference the latest version of General Motors Upfitter Integration Bulletin 115 for this information. It can be found at http://www.gmupfitter.com.

caliper piston area found during a service of the vehicle. The substance is actually excess assembly grease from the caliper boot and piston installation. This grease can be cleaned off and the rest of the service completed.

Technician should inspect the head gaskets to ensure are not installed backwards. Technician should replace the head gasket if they are found installed backwards.

overfull on oil causing an engine vibration concern. The technician is advised to inspect for contaminnants and adjust the engine oil level as needed.

issues in very cold ambient temperatures. To allow the ice to melt so that it can be drained from the related components. That any of the listed DTC's may set with or without poor engine performance.

Option Code L83, L86, or LV3 may have an oil consumption concern were one quart in 2000 miles is being used. Dealer will confirm oil level was properly checked per Owner's Manual, and check the bolt torque on the Valve Lifter Oil Manifold Assembly, before doing any repairs to the vehicle.

restriction that has ended for the hybrid/EV battery Pack, Hybrid/EV Powertrain Control Module (HPCM2), High Voltage Battery Interface Control Module 1 and 2, Drive Motor Generator Battery Cooling Blower.

automatic transmission fluid pan hear with thethe key on and engine off, or for up to one minute after the vehicle has been shut off should be deemed a normal characteristic.

issues in very cold ambient temperatures. To allow the ice to melt so that it can be drained from the related components. That any of the listed DTC's may set with or without poor engine performance.

factory Integrated Trailer Brake Control be bypassed and their aftermarket trailer brake controller be installed instead. Technician will need to gain access to the body harness. Install trailer brake controller harness General Motors part number 23184088 into Middle Bus Electrical Center (X61A).

vehicle comes in with misfire and DTC Codes P0300 - P0308 and/or P050D

some newer General Motors infotainment systems. Pair the iPhone to the system then enter the Bluetooth settings menu, select the ?i? icon next to the vehicle name in the device and enable show notifications. The text messaging feature will be available on the next ignition cycle. However with iPhones text messages cannot be responded to when using the infotainment system, they can only be received. For android devices pair the phone to the system during the pairing process the phone will ask you to allow the vehicle to access the device contacts. A second question will pop up on the device asking to allow the vehicle to access the message access profile. Both have to be allowed for the text messaging feature to work.

that have a no crank or a start and then immediate stall, Service Engine Soon Malfunction Indicator lamp may not be on when the ignition is in the run position. Technician may find Diagnostic Trouble Codes P0513 and or P262B may also be set. Technician will pulled the driver sill plate and inspect the wiring for damaged or corroded circuits. Technician will repair any damaged or corroded circuits.

The engine Base timing is not being set correctly. The information in this PI will be helpful in setting the timing in the vehicle.

engine soon malfunction indicator lamp, antilock braking system malfunction indicator lamp, service suspension system message, misfire, hesitation, no crank, heater-vent-air conditioning inoperative. Technician may find F11UA, F104UA, F35UA, and or F60UA blown. Technician should inspect the engine harness near the vacuum pump pulley to be chafing. Technician will need to reroute the wire harness and repair and damaged wires.

can cause an electrical short which will keep modules from shutting down causing a dead battery and a no crank condition, a crank no start,or unable to program the engine control module. Engine control module will set a diagnostic trouble code of P1682, or the engine will continue to run with the ignition off.

engine hours are not correct and display 0.0. Technician will need to program the Instrument Panel Cluster using Service Programming System.

diagnosing a service driver assist message with a diagnostic trouble code B172E and or a B172F. The haptic seat motor has a pigtail lead coming off of it. In many cases the wiring pigtail near the haptic seat motor has broken and will require replacement.

illuminate due to trouble codesP0601-P0604, P0606, P062B, P062F, P0630, P16F3, or P262B . The dealer is to inspect the engine control module's electrical connections and for proper powers and grounds. Dealer instructed to replace the Engine Control Module, if no other issues found.

cansetdue to voltage from the Transmission park/neutral signal 1circuit bleeding into the knock sensor system circuits.If SI does not isolate the concern inspect the K20 ECM connector X2 looking for debris, connectorand or terminal concerns.

vehicles that may have issues were the customer will need increased effort to depress the brake pedal. Technician may find fluid in the brake booster and/or the booster vacuum line. Technician will need to replace Vacuum Pump, Brake Booster, Master Cylinder, Vacuum Pump Belt and the Vacuum Line between the booster and the pump.

pressure gauge jumps from approximately 40 lb. to 60 lb. The 4.3L (LV3), 5.3L (L83), 6.2L (L86) engines are equipped with a two stage oil pump. Dealer should advise the customer this is normal operation for these engines.

A vehicle may have a concern ofDTCP050D setting along with a P0300 after a cold start up. White smoke and/or coolant odor may come from exhaust for an extended period of time at cold start as well. Cause Coolant getting into the cylinders, and provides direction for the repair.

A vehicle may have a concern of DTCP050D setting along with a P0300 after a cold start up. White smoke and/or coolant odor may come from exhaust for an extended period of time at cold start as well. Cause Coolant getting into the cylinders, and provides direction for the repair.

White smoke and/or coolant odor may come from exhaust for an extended period of time at cold start as well. Cause: Coolant getting into the cylinders, and provides direction for the repair.

of Malfunction Indicator Lamp Illuminated with DTCs P0335, P0340, or P0365 Set.

customers concern of engine misfire, ticking noise and/or MIL on.

General Motors against defects in material or workmanship under the Bumper-to-Bumper New Vehicle Limited Warranty.

engine oil consumption.

hardware detection in Duramax Diesel Engines using GDS 2.

Check Engine Light, Delayed Shifts and/or Transmission Stuck in Gear with DTC P0751, P0752, P0756, P0757, P0761 or P0762 Set.

a MIL or a engine misfire due to a loose spark plug wire.

of the Air bag light illuminated and SIR codes set within the SIR module.

the rear view camera is inoperative.

with No Start or Stalling with DTC P0011 and/or P00C6 Set.

White smoke and/or coolant odor may come from exhaust for an extended period of time at cold start as well. CauseCoolant getting into the cylinders, and provides direction for the repair.

harness if water and/or corrosion is found in the connectors.

pressure gauge jumps from approximately 40 lb. to 60 lb. The 4.3L (L83), 5.3L (L86), 6.2L (LV3) engines are equipped with a two stage oil pump. Dealer should advise the customer this is normal operation for these engines.

White smoke and/or coolant odor may come from exhaust for an extended period of time at cold start as well. CauseCoolant getting into the cylinders, and provides direction for the repair.

indicator lamp illuminated and a DTC of P154A set.

The engine Base timing is not being set correctly. The information in this PI will be helpful in setting the timing in the vehicle.

can cause an electrical short which will keep modules from shutting down causing a dead battery and a no crank condition, a crank no start,or unable to program the engine control module. Engine control module will set a diagnostic trouble code of P1682, or the engine will continue to run with the ignition off.

White smoke and/or coolant odor may come from exhaust for an extended period of time at cold start as well. CauseCoolant getting into the cylinders, and provides direction for the repair.

1/2 and 2/3 and Sputter Applying Throttle Between 0 and 30%, Rough idle. Technician may find Diagnostic Trouble Codes P0101, P0171, P0172, P0174, and or P0175. Technician should inspect for cast flashing near the Mass Air Flow sensor as seen below.

hot with the snow plow installed. Do not exceed 64 kilometers per hour / 40 miles per hour with a snow plow mounted to the vehicle even if equipped with VYU. The vehicle could overheat and be damaged.

Technician may find a Diagnostic Trouble Code P0300 stored. Technician will add coolant dye to the system, run engine through warm up, pressurize the cooling system on a cold soak engine and inspect the suspect cylinder with a bore scope for coolant dye evidence. If coolant is found in the cylinder do not replace the cylinder head because that will not repair this concern. Dealer will need to contact General Motors Product Quality Center for engine replacement.

retain the previous settings and will go to the Home Icon screen when the vehicle is restarted. Dealer should communicate to the customer that we apologize for this inconvenience and that General Motors is currently evaluating this concern.

White smoke and/or coolant odor may come from exhaust for an extended period of time at cold start as well. Cause Coolant getting into the cylinders, and provides direction for the repair.

White smoke and/or coolant odor may come from exhaust for an extended period of time at cold start as well. CauseCoolant getting into the cylinders, and provides direction for the repair.

engine oil consumption.

for customer concerns related to wheel alignment.

breakdown or non-function due to aftermarket power-up devices vs. non overpower engine non-function of pistons, cylinders, valve train components, and DTC P003A or P111D set.

disassembled or improperly packaged turbochargers returned to Warranty Part Center.

vehicles that may have a shake or shudder during light throttle acceleration, between 30 and 65 miles per hour steady state driving. Also shudder feeling that may be described as driving over rumble strips or rough pavement. Technician will need to run the vehicle in three different operational modes. The three modes are Normal, torque converter clutch open, and torque converter clutch closed. Technician will need to press and hold the tow-haul mode button for five seconds to disable grade braking to prevent downshifts during test. Technician will need to duplicate the concern in Normal mode. If the concern is gone in torque converter clutch open and closed then the torque converter should be replaced. If the concern is not present in normal mode, torque converter clutch open, and torque converter clutch closed the concern is not with the shudder. Technician should use of the PICO scope and Noise, Vibration and Harshness software can be used to confirm torque converter clutch shudder, Engine, Tire or Driveline component related conditions. Flush the cooler lines and cooler using DT-45096 transmission oil cooling system flush and flow test tool when the torque converter is replace.

system will be unable to enter addresses that contain diacritics using the touch screen. Dealer should communicate to the customer that we apologize for this inconvenience and that General Motors is working on a solution for this concern.

Panel Cluster, Radio, and Heater-Vent-Air Conditioning display blanks out, Bluetooth phone or Pandora connection dropped, the radio station or volume changes when operating the snow plow. Please advise the customer that engineering is aware of this concern and working on this issue.

6L80 Regular Production Option Code (MYC), 6L90 Regular Production Option Code (MYD) or 8L90 Regular Production Option Code (M5U) Automatic Transmission, now have Powertrain Grade Braking. Powertrain grade braking assists when driving on a downhill grade to help maintain desired vehicle speed by using the engine and transmission to slow the vehicle.

repair vehicles that may have stalling shudder and/or hard shifting into 1st gear or reverse vibration on launch (with excessive crankshaft end play). Technician will test to determine if the crank shaft end play is within specification 0.0015–0.0086 inch. If end play is found to be out of specification, remove engine and inspect for possible crankshaft thrust bearing and/or crankshaft for wear. Inspect thrust bearing for wear on one side and crankshaft on that “mating” surface. If the thrust bearing has three vertical channels worn off replace connecting rod bearings, main bearings, thrust bearing and crankshaft. If working on a Corvette the oil tank with lines and oil cooler are both required to be replaced if equipped

White smoke and/or coolant odor may come from exhaust for an extended period of time at cold start as well. CauseCoolant getting into the cylinders, and provides direction for the repair.

vehicles that may have a buffeting vibration and/or drone type noise, exhaust tone change, and/or body pressure booming. Replace or repair any of the issue that was found in the inspection.If the vehicle is equipped with a 4.3 liter or 5.3 liter engine an updated exhaust system is now available.

White smoke and/or coolant odor may come from exhaust for an extended period of time at cold start as well. CauseCoolant getting into the cylinders, and provides direction for the repair.

or Loud Noise with No Forward (Drive) or Reverse Ranges

12638502 has been placed on a parts restriction through the General Motors Product Quality Center. Dealer will need to contact the General Motors Product Quality Center for further assistance.

can cause an electrical short which will keep modules from shutting down causing a dead battery and a no crank condition, a crank no start,or unable to program the engine control module. Engine control module will set a diagnostic trouble code of P1682, or the engine will continue to run with the ignition off.

some newer General Motors infotainment systems. Pair the iPhone to the system then enter the Bluetooth settings menu, select the “i” icon next to the vehicle name in the device and enable show notifications. The text messaging feature will be available on the next ignition cycle. However with iPhones text messages cannot be responded to when using the infotainment system, they can only be received. For android devices pair the phone to the system during the pairing process the phone will ask you to allow the vehicle to access the device contacts. A second question will pop up on the device asking to allow the vehicle to access the message access profile. Both have to be allowed for the text messaging feature to work.

vehicles that may have a buffeting vibration and/or drone type noise, exhaust tone change, and/or body pressure booming. Replace or repair any of the issue that was found in the inspection.If the vehicle is equipped with a 4.3 liter or 5.3 liter engine an updated exhaust system is now available.

can cause an electrical short which will keep modules from shutting down causing a dead battery and a no crank condition, a crank no start,or unable to program the engine control module. Engine control module will set a diagnostic trouble code of P1682, or the engine will continue to run with the ignition off.

Certain vehicles may have key codes which were inappropriately handled by a third party which could increase the risk of vehicle theft. Dealers are to replace all applicable keys and lock cylinders with new key configurations.

CUSTOMERS CONCERN OF ENGINE MISFIRE, TICK NOISE AND MIL ON.

ORIGINATING FROM THE SECOND ROW SEAT.

ONSTAR WIRELESS FIDELITY INOPERATIVE. TECHNICIAN WILL NEED TO CONTACT GENERAL MOTORS TECHNICAL ASSISTANCE CENTER WITH A SCAN TOOL CONNECT TO THE VEHICLE FOR FURTHER ASSISTANCE.

REPAIRING VEHICLES THAT MAY HAVE UNWANTED GRADE BRAKING, REDUCED ENGINE POWER WITH NO DRIVER INFORMATION CENTER MESSAGES BRAKE PEDAL OVERRIDE FEATURE , TRANSMISSION BUSY OR FREQUENT SHIFTING UP OR DOWN, AND DIAGNOSTIC TROUBLE CODES P057B, P057C, AND/OR P057D MAY OR MAY NOT BE SET. TECHNICIAN WILL USE THIS PRELIMINARY INFORMATION TO FIND THE BRAKE PEDAL POSITION DATA PARAMETERS IN THE SCAN TOOL, AND ALSO TO PROVIDE SOME ADDITIONAL DIAGNOSTIC HELP. THESE ISSUES MAY BE CAUSED BY AN INCORRECT BRAKE PEDAL POSITION SENSOR INPUT TO THE ENGINE CONTROL MODULE. TECHNICIAN WILL VERIFY WITH THE SCAN TOOL IF THE ENGINE CONTROL MODULE HAS THE CORRECT PARAMETERS FOR THE BRAKE PEDAL POSITION SENSOR. IF AN ENGINE CONTROL MODULE BRAKE PEDAL POSITION SENSOR RELEARN IS PERFORMED, THE TRUCK MAY BE TEMPORARILY REPAIRED UNTIL THE INTERMITTENT WIRING ISSUE BETWEEN THE ENGINE CONTROL MODULE AND BRAKE PEDAL POSITION SENSOR OCCURS AGAIN. ON 2014 AND NEWER TRUCKS INSPECT AND REPAIR ANY DAMAGE TO X115 AND X119. ON THE 2014 AND PREVIOUS TRUCKS INSPECT AND REPAIR ANY DAMAGE TO X205.

ENGINE SOON MALFUNCTION INDICATOR LAMP ON. TECHNICIAN MAY FIND DIAGNOSTIC TROUBLE CODES P2635, U0074 AND OR U18A2. TECHNICIAN WILL NEED TO FOLLOW PUBLISHED DIAGNOSTICS FOR DIAGNOSTIC TROUBLE CODES U0074 WOULD TAKE PRIORITY OVER U18A2 IF BOTH SET BEFORE ADDRESSING DTC P2635.

ENGINE SOON MALFUNCTION INDICATOR LAMP ON. TECHNICIAN MAY FIND DIAGNOSTIC TROUBLE CODES P0106 AND P0506. TECHNICIAN WILL INSPECT FOR A BROKEN VALVE SPRING AND REPLACE AS NEEDED.

INACCURATE READS 5 MPH WHEN TRAVELING 50 MPH. ENGINEERING IS WORKING TO DEVELOP A SOLUTION.

OPTION CODE L83, L86, OR LV3 MAY HAVE AN OIL CONSUMPTION CONCERN WERE ONE QUART IN 2000 MILES IS BEING USED. DEALER WILL CONFIRM OIL LEVEL WAS PROPERLY CHECKED PER OWNERS MANUAL, AND CHECK THE BOLT TORQUE ON THE VALVE LIFTER OIL MANIFOLD ASSEMBLY, BEFORE YOU CONTACTING GENERAL MOTORS PRODUCT QUALITY CENTER.

THE MONITOR CALCULATES THE PERCENT OF OIL LIFE REMAINING, BASED ON 3 PATHWAYS. THE FIRST PATHWAY FOR OIL LIFE CALCULATION IS ENGINE REVOLUTIONS. THE SECOND PATHWAY FOR OIL LIFE CALCULATION IS THE MILEAGE FORM THE LAST REST FOR ALL GENERAL MOTORS POWERTRAINS EXCEPT THE VOLT. THE THIRD PATHWAY FOR OIL LIFE CALCULATION IS THE AMOUNT OF TIME THE OIL IS IN THE ENGINE. THE VOLT USES A 2 YEAR TIMER INSTEAD OF 1 YEAR. IT ALSO USES THE ENGINE REVOLUTION COUNTER. IT DOES NOT USE THE MILEAGE PATHWAY TO COUNT DOWN.

REPAIR VEHICLES WITH A ROUGH IDLE AND/OR VIBRATION AT IDLE IN DRIVE. THIS CONDITION WILL NOT BE PRESENT IN PARK, OR NEUTRAL. THIS CONCERN MAY BE CAUSED BY GROUND OUT WITHIN THE ONE OR BOTH ENGINE MOUNTS. TECHNICIAN WILL USE CH-51450-A (PICO OSCILLOSCOPE) TO MEASURE THE VIBRATION DISTURBANCE. IF THE VIBRATION CONCERN IS E1.5 IN THE HORIZONTAL / LATERAL DIRECTION WITH PICO SENSOR MOUNTED IN SEAT TRACK AS INDICATED CONTINUE WITH STEPS TO REDUCE THE AMPLITUDE OF THE VIBRATION BY ADDING SPACERS IN KEY LOCATIONS TO REDUCE GROUND OUT WITHIN THE ENGINE MOUNTS. THE 6.2L ENGINE HAS A CHARACTERISTIC E1 WHICH CAN BE FELT, AND MAY BE DESCRIBED AS A LOPEY IDLE. DO NOT CONFUSE 6.2L E1 CHARACTERISTIC (NOT CAUSED BY MOUNT GROUND-OUT), WITH E1.5 NORMAL IDLE CHARACTERISTICS BEING TRANSMITTED INTO THE TRUCK VIA GROUND-OUT THRU THE ENGINE MOUNTS.

LML/LGH, ENGINE PART NUMBER 12638505 PARTS RESTRICTION HAS ENDED. DEALER CAN ORDER PARTS THROUGH THE REGULAR CUSTOMER CARE AND AFTERSALES PARTS PROCESS.

DEALER SHOULD COMMUNICATE TO THE CUSTOMER THAT WE APOLOGIZE FOR THIS INCONVENIENCE AND THAT GENERAL MOTORS IS WORKING ON A SOLUTION FOR THIS CONCERN.

LOSS OF GRIDLINES IN THE REAR CAMERA DISPLAY SCREEN AND A "SERVICE REAR VISION SYSTEM" MESSAGE THAT BOTH HAPPEN AT THE SAME TIME. TECHNICIAN SHOULD CHECK FOR DIAGNOSTIC TROUBLE CODES AND FOLLOW PUBLISHED SERVICE INFORMATION DIAGNOSTICS FOR THE DIAGNOSTIC TROUBLE CODES. IF NOT DIAGNOSTIC TROUBLE CODES STORED AND THE CONCERN WAS DUPLICATED OR THE CUSTOMER DESCRIBED THE CONCERN, DEALER SHOULD COMMUNICATE TO THE CUSTOMER THAT WE APOLOGIZE FOR THIS INCONVENIENCE AND THAT GENERAL MOTORS IS CURRENTLY EVALUATING THIS CONCERN.

REGULAR PRODUCTION OPTION CODE IO6 OR UY4 THAT DEFAULTS TO WEST VIRGINIA INSTEAD OF VIRGINIA ON A MANUAL ENTRY. GENERAL MOTORS ENGINEERING IS CURRENTLY WORKING ON A SOLUTION FOR THIS CONCERN.

DELAYED ENGAGEMENT WHEN THE TRANSMISSION IS SHIFTED FROM PARK TO REVERSE OR PARK TO DRIVE AFTER THE VEHICLE HAS BEEN SITTING WITH THE ENGINE OFF DUE TO THE TORQUE CONVERTER DRAINING THE TRANSMISSION FLUID BACK INTO THE TRANSMISSION PAN.

LEAKING FROM THE COOLANT SURGE TANK AREA OF THE VEHICLE. TECHNICIAN SHOULD INSPECT THE SURGE TANK. IF THE LEAK IS COMING FROM THE SURGE TANK IT WILL NEED TO BE REPLACED ALONG WITH THE CAP.

VEHICLES THAT MAY HAVE ISSUES WERE THE CUSTOMER WILL NEED INCREASED EFFORT TO DEPRESS THE BRAKE PEDAL. TECHNICIAN MAY FIND FLUID IN THE BRAKE BOOSTER AND/OR THE BOOSTER VACUUM LINE. TECHNICIAN WILL NEED TO REPLACE VACUUM PUMP, BRAKE BOOSTER, MASTER CYLINDER, VACUUM PUMP BELT AND THE VACUUM LINE BETWEEN THE BOOSTER AND THE PUMP.

PANEL CLUSTER THE EXCHANGE CENTER IS UNABLE TO PROGRAM THE ACTUAL MILEAGE ON THE ODOMETER OR THE ACTUAL MILEAGE IS UNKNOWN. DEALER WILL NEED TO FOLLOW DEALER TO THE GENERAL MOTORS SERVICE POLICIES AND PROCEDURES MANUAL SECTION 5.2.4 ODOMETER SERVICING.

THAT MAY HAVE A FLASHING PRNDL OR CHECK ENGINE LIGHT ON. ALSO THE TRANSMISSION IS STUCK IN ONE GEAR AND WILL NOT UPSHIFT. IF SERVICE INFORMATION DIAGNOSTICS FOR THE DIAGNOSTIC TROUBLE CODES SETTING DOES NOT LEAD TO A RESOLUTION, THE PRESSURE SWITCH MANIFOLD SHOULD BE REPLACED.

VEHICLES THAT MAY HAVE A SHAKE OR SHUDDER DURING LIGHT THROTTLE ACCELERATION, BETWEEN 30 AND 65 MPH STEADY STATE DRIVING. ALSO SHUDDER FEELING THAT MAY BE DESCRIBED AS DRIVING OVER RUMBLE STRIPS OR ROUGH PAVEMENT. TECHNICIAN WILL DRIVE THE VEHICLE AND MONITOR THE TORQUE CONVERTER CLUTCH SLIP. THE TORQUE CONVERTER CLUTCH SLIP SPEED SHOULD BE 10 RPM OR LESS ALSO NOTE IF THE SHUDDER TAKES PLACE DURING TORQUE CONVERTER CLUTCH APPLY. IF THE TORQUE CONVERTER CLUTCH SLIP SPEED IS IN THE RANGE OF 10 RPM OR LESS THE CONDITION IS POSSIBLY RELATED TO ENGINE PERFORMANCE. IF THE SHUDDER IS ONLY PRESENT IN 4 CYLINDER MODE AND TORQUE CONVERTER CLUTCH SLIP IS 10 RPM OR LESS DEEM THE SHUDDER CONCERN NORMAL CHARACTERISTIC OF ACTIVE FUEL MANAGEMENT. IF THE SLIP SPEED IS BEYOND 10 RPM OR THERE IS SHUDDER DURING TORQUE CONVERTER CLUTCH APPLY THE TORQUE CONVERTER WILL NEED TO BE REPLACED.

PITCHED WHINE NOISE FROM THE VEHICLE NOTICED WHEN DRIVING IN AUTO 4WD. WHEN THE TRANSFER CASE CONTROL MODULE HAS TO MOVE THE TRANSFER CASE ACTUATOR MOTOR THE HIGHER CURRENT PASSING THROUGH THE MODULE CAUSES AN "ELECTRONIC BUZZ OR WHINE" WITHIN SOME OF THE CAPACITORS IN THE MODULE THAT CAN BE HEARD BY SOME OF OUR CUSTOMERS. THIS CAN ONLY BE HEARD WITH ALL ACCESSORIES AND HVAC OFF AND ONLY WHEN ACTUATOR MOVEMENT IS REQUIRED. THIS DOES NOT INDICATE A CONCERN WITH THE MODULE AND SHOULD NOT BE REPLACED TO ADDRESS THIS CONCERN.

REPAIR VEHICLES THAT MAY HAVE STALLING SHUDDER AND/OR HARD SHIFTING INTO 1ST GEAR OR REVERSE VIBRATION ON LAUNCH (WITH EXCESSIVE CRANKSHAFT END PLAY). TECHNICIAN WILL TEST TO DETERMINE IF THE CRANK SHAFT END PLAY IS WITHIN SPECIFICATION 0.00150.0086 INCH. IF END PLAY IS FOUND TO BE OUT OF SPECIFICATION, REMOVE ENGINE AND INSPECT FOR POSSIBLE CRANKSHAFT THRUST BEARING AND/OR CRANKSHAFT FOR WEAR. INSPECT THRUST BEARING FOR WEAR ON ONE SIDE AND CRANKSHAFT ON THAT MATING SURFACE. IF THE THRUST BEARING HAS THREE VERTICAL CHANNELS WORN OFF REPLACE CONNECTING ROD BEARINGS, MAIN BEARINGS, THRUST BEARING AND CRANKSHAFT. IF WORKING ON A CORVETTE THE OIL TANK WITH LINES AND OIL COOLER ARE BOTH REQUIRED TO BE REPLACED IF EQUIPPED.

DEALER SHOULD COMPLETE THE SERVICE INFORMATION DIAGNOSTICS AND THE COST COMPARISON WORKSHEET FOR ASSEMBLY REPAIR VS REPLACEMENT. TECHNICIAN WILL USE THE LATEST VERSION OF 09-06-04-026G TO VERIFY THE ECM CALIBRATION IS NOT AN AFTERMARKET CALIBRATION. IF THE CUSTOMER PREFERS TO KEEP THE ORIGINAL NUMBERS MATCHING ENGINE PLEASE CALL TAC FOR REPAIR DIRECTION.

HAS BEEN PLACED ON RESTRICTION THROUGH GENERAL MOTORS PRODUCT QUALITY CENTER. DEALER WILL NEED TO CALL GENERAL MOTORS PRODUCT QUALITY CENTER FOR FURTHER ASSISTANCE.

RESTRICTION THROUGH THE PRODUCT QUALITY CENTER TO ASSIST ENGINEERING WITH PRODUCT FEEDBACK. DEALER WILL NEED TO CALL GENERAL MOTORS PRODUCT QUALITY CENTER FOR FURTHER ASSISTANCE.

OF INTERMITTENT HVAC COOLING ISSUES WHILE DRIVING.

OF BANG OR LOUD NOISE WITH NO FORWARD (DRIVE) OR REVERSE RANGES.

GENERAL MOTORS AGAINST DEFECTS IN MATERIAL OR WORKMANSHIP UNDER THE BUMPER-TO-BUMPER NEW VEHICLE LIMITED WARRANTY.

PROCEDURE FOUND IN THE SERVICE INFORMATION.

PARTS RESTRICTION HAS ENDED.

REPAIR THE CONCERN OF THE VEHICLE CRANKS BUT DOES NOT START. THE TECHNICIAN IS TO INSPECT FOR A SHEARED CAM PIN IN THE ENGINE.

THE TECHNICIAN IS TO CALL THE GENERAL MOTORS TECHNICAL ASSISTANCE CENTER WITH THE FINDINGS FROM THE QUESTIONS PROVIDED.

RADIO CONTROLS, INTEGRATED CENTER STACK, DISPLAY, AND MEDIA DISC PLAYERS ARE PLACED ON RESTRICTION THROUGH THE GENERAL MOTORS TECHNICAL ASSISTANCE CENTER. DEALER WILL NEED TO CONTACT GENERAL MOTORS TECHNICAL ASSISTANCE CENTER FOR FURTHER ASSISTANCE.

ASSIST, ENGINE STALL OR THE INSTRUMENT PANEL, RADIO, AND OR HEATER-VENT-AIR CONDITIONING GO BLANK WITH MULTIPLE DIAGNOSTIC TROUBLE CODES. IF ANY OF THE FOLLOWING DIAGNOSTIC TROUBLE CODES U0073, U0078, U0029, U0028, U0415, U0140, U0126, U0121, U0101, U0100, C0544, U1510, U0073, B127B, B2605, B3600,C0800, U0428, AND U0452 SET IN THE VEHICLE. CHECK THE BODY CONTROL MODULE GROUND AT THE G218 LOCATION. THE FRONT DASH INSULATOR MAT MAY BE TRAPPED BETWEEN THE GROUND EYELET AND THE BODY STUD. REMOVE THE ROUND NUT AND EYELET AND CUT THE FRONT DASH INSULATOR MAT AWAY FROM THE GROUND STUD SO IT NO LONGER INTERFERES WITH THE GROUND STUD AND REINSTALL THE EYELET AND GROUND NUT. TECHNICIAN SHOULD ALSO INSPECT CONNECTOR X183 AND X133FOR ANY BROKEN, LOOSE, BACKED OUT TERMINALS AND REPAIR AS NECESSARY.

THAT HAVE A NO CRANK OR A START AND THEN IMMEDIATE STALL, SERVICE ENGINE SOON MALFUNCTION INDICATOR LAMP MAY NOT BE ON WHEN THE IGNITION IS IN THE RUN POSITION. TECHNICIAN MAY FIND DIAGNOSTIC TROUBLE CODES P0513 AND OR P262B MAY ALSO BE SET. TECHNICIAN WILL PULLED THE DRIVER SILL PLATE AND INSPECT THE WIRING FOR DAMAGED OR CORRODED CIRCUITS. TECHNICIAN WILL REPAIR ANY DAMAGED OR CORRODED CIRCUITS.

VEHICLES THAT HAVE REMOTE START IS INOPERATIVE, POWER LIFT-GATE REGULAR PRODUCTION OPTION CODE (TB5) IS INOPERATIVE WITH THE IGNITION OFF, AND VEHICLES EQUIPPED WITH THE DIESEL ENGINE, THE BLOWER MOTOR MAY STAY ON AFTER THE ENGINE IS TURNED OFF. TECHNICIAN MAY FIND DIAGNOSTIC TROUBLE CODE P2537 SET. TECHNICIAN WILL NEED TO USE A VOLTMETER AND CHECK CIRCUIT 5985 AT THE ENGINE CONTROL MODULE AND TRANSMISSION CONTROL MODULE. IF NO OR LOW VOLTAGE IS FOUND, USE THE WIRING DIAGRAM IN SERVICE INFORMATION AND PERFORM NORMAL CIRCUIT DIAGNOSIS. TECHNICIAN WILL NEED TO INSPECT FOR HIGH RESISTANCE OR OPEN IN CIRCUIT 5985 IS UNDER THE DRIVERS SILL PLATE AND REPAIR AS NEEDED.

ENGINE SOON MALFUNCTION INDICATOR LAMP, ANTILOCK BRAKING SYSTEM MALFUNCTION INDICATOR LAMP, SERVICE SUSPENSION SYSTEM MESSAGE, MISFIRE, HESITATION, NO CRANK, HEATER-VENT-AIR CONDITIONING INOPERATIVE. TECHNICIAN MAY FIND F11UA, F104UA, F35UA, AND OR F60UA BLOWN. TECHNICIAN SHOULD INSPECT THE ENGINE HARNESS NEAR THE VACUUM PUMP PULLEY TO BE CHAFING. TECHNICIAN WILL NEED TO REROUTE THE WIRE HARNESS AND REPAIR AND DAMAGED WIRES.

TEST PROBE, REPLACEMENT TERMINALS, AND TERMINATED LEADS. THE J-35616-64B IS THE LATEST TEST PROBE RELEASED FOR CHECKING TENSION OR PROBING THE .64 SERIES TERMINALS. THE TEST PROBE TERMINAL HAS BEEN RELEASED IN THE TERMINAL REPAIR KIT (J-38125-620H) LOCATED IN LEAR TRAY 7 PART NUMBER 963716-2. THERE ARE 5 TERMINATED LEADS IN A PACKAGE PART NUMBER IS 13505346, WHICH CAN BE ORDERED THROUGH YOUR NORMAL GENERAL MOTORS CUSTOMER CARE AND AFTERSALES PARTS CHANNEL

INDICATOR LAMP WHEN SWITCHING TO COMPRESSED NATURAL GAS. TECHNICIAN WILL FIND A DIAGNOSTIC TROUBLE CODE P2199 SET. TECHNICIAN SHOULD USE PUBLISHED SERVICE INFORMATION DIAGNOSTIC PROCEDURES FOR DIAGNOSTIC TROUBLE CODE P2199. IF THE CONCERN IS NOT RESOLVED USING SERVICE INFORMATION, ENGINEERING IS AWARE OF THE CONCERN AND DON'T ATTEMPT TO REPAIR THIS CONCERN AT THIS TIME.

OPTION CODE L83, L86, OR LV3 MAY HAVE AN OIL CONSUMPTION CONCERN WERE ONE QUART IN 2000 MILES IS BEING USED. DEALER WILL CONFIRM OIL LEVEL WAS PROPERLY CHECKED PER OWNERS MANUAL, AND CHECK THE BOLT TORQUE ON THE VALVE LIFTER OIL MANIFOLD ASSEMBLY, BEFORE YOU CONTACTING GENERAL MOTORS PRODUCT QUALITY CENTER.

WHEN GETTING A SERVICE PROGRAMMING SYSTEM ERROR CODE E4491 OR E4423. IN SOME CASES TECHLINE CUSTOMER SUPPORT CENTER MAY NEED TO BE CONTACTED TO RESOLVE THE ISSUE.

THE VEHICLES THAT MAY HAVE A SHAKE OR SHUDDER DURING LIGHT THROTTLE ACCELERATION, BETWEEN 30 AND 65 MPH STEADY STATE DRIVING. ALSO SHUDDER FEELING THAT MAY BE DESCRIBED AS DRIVING OVER RUMBLE STRIPS OR ROUGH PAVEMENT. TECHNICIAN WILL DRIVE THE VEHICLE AND MONITOR THE TORQUE CONVERTER CLUTCH SLIP. THE TORQUE CONVERTER CLUTCH SLIP SPEED SHOULD BE 10 RPM OR LESS ALSO NOTE IF THE SHUDDER TAKES PLACE DURING TORQUE CONVERTER CLUTCH APPLY. IF THE TORQUE CONVERTER CLUTCH SLIP SPEED IS IN THE RANGE OF 10 RPM OR LESS THE CONDITION IS POSSIBLY RELATED TO ENGINE PERFORMANCE. IF THE SHUDDER IS ONLY PRESENT IN 4 CYLINDER MODE AND TORQUE CONVERTER CLUTCH SLIP IS 10 RPM OR LESS DEEM THE SHUDDER CONCERN NORMAL CHARACTERISTIC OF ACTIVE FUEL MANAGEMENT. IF THE SLIP SPEED IS BEYOND 10 RPM OR THERE IS SHUDDER DURING TORQUE CONVERTER CLUTCH APPLY THE TORQUE CONVERTER WILL NEED TO BE REPLACED.

TECHNICIAN MAY ALSO FIND A DIAGNOSTIC TROUBLE CODE P0521 IN THE ENGINE CONTROL MODULE. TECHNICIAN SHOULD FOLLOW ALL PUBLISHED SERVICE INFORMATION DIAGNOSIS. WHEN USING A SCAN TOOL IF THE OIL PRESSURE IS LOW BUT THE OIL PRESSURE AT THE OIL FILTER HOUSING IS CORRECT, TECHNICIAN SHOULD INSPECT THE VALVE LIFTER OIL FILTER FOR DEBRIS/SLUDGE THAT COULD BE RESTRICTING OIL FLOW TO THE OIL PRESSURE SENSOR. TECHNICIAN SHOULD REMOVE THE VALVE LIFTER OIL FILTER AND CLEAN IT. IF THE VALVE LIFTER OIL FILTER CANNOT BE CLEANED REPLACE IT.

OF USB PORT INOPERATIVE.

WARPED.

DESIRES ADDITIVES TO PREVENT FUEL CONCERNS DEPENDING ON FUEL OR TEMPERATURE RELATED CONDITIONS.

ENGINE DAMAGE.

GASKET SEALING SURFACES.

AFTERMARKET CALIBRATIONS OR PERFORMANCE PARTS MAY BE THE CAUSE.

FILL.

TECHNICIAN WILL ACCESS BOTH HAPTIC SEAT MOTORS AND ROTATE THE MOTORS FLAT, AND THEN REINSTALL THEM BACK INTO THE SEAT CUSHION. THIS WILL HELP IMPROVE THE COMFORT OF THE SEAT CUSHION.

VEHICLES THAT MAY HAVE ISSUES WERE THE CUSTOMER WILL NEED INCREASED EFFORT TO DEPRESS THE BRAKE PEDAL. TECHNICIAN MAY FIND FLUID IN THE BRAKE BOOSTER AND/OR THE BOOSTER VACUUM LINE. TECHNICIAN WILL NEED TO REPLACE VACUUM PUMP, BRAKE BOOSTER, MASTER CYLINDER, VACUUM PUMP BELT AND THE VACUUM LINE BETWEEN THE BOOSTER AND THE PUMP.

THAT MAY HAVE DIAGNOSTIC TROUBLE CODE P06DD OR NO OR LOW OIL PRESSURE. TECHNICIAN WILL REPLACE TIMING CHAIN TENSIONER GUIDE. IF OIL PUMP FACE IS DAMAGED AND OR WORN THRU REPLACE OIL PUMP. INSPECT BEARINGS FOR DAMAGE WEAR DUE TO DEBRIS FROM OIL PUMP.

ASSEMBLY REGULAR PRODUCTION OPTION CODE MW7 BEEN PLACED ON RESTRICTION THROUGH GENERAL MOTORS PRODUCT QUALITY CENTER. DEALER WILL NEED TO CALL GENERAL MOTORS PRODUCT QUALITY CENTER FOR FURTHER ASSISTANCE.

VEHICLES THAT MAY HAVE AN INTERMITTENT "CHECK TRAILER WIRING" OR "SERVICE TRAILER BRAKE" MESSAGE ON THE DRIVER INFORMATION CENTER. TECHNICIAN WILL INSPECT AND CLEAN THE GROUND WIRE (NORMALLY WHITE WIRE) CONNECTION ON THE TRAILER SIDE OF THE 7-PIN CONNECTOR. INSPECT THAT THE WIRES INSIDE THE TRAILER SIDE CONNECTOR ARE CLEAN AND SECURELY FASTENED. IF THE VEHICLES 7-WAY CONNECTOR SOCKET TERMINALS ARE DEFORMED OR HAVE EXCESSIVE WEAR, IT WILL BE NECESSARY TO REPLACE THE TRUCK SIDE CONNECTOR FROM GENERAL MOTORS CUSTOMER CARE AND AFTERSALES ALONG WITH THE TRAILER'S 7-WAY CONNECTOR PLUG.

REPAIR VEHICLES WITH A ROUGH IDLE AND/OR VIBRATION AT IDLE IN DRIVE. THIS CONDITION WILL NOT BE PRESENT IN PARK, OR NEUTRAL. THIS CONCERN MAY BE CAUSED BY GROUND OUT WITHIN THE ONE OR BOTH ENGINE MOUNTS. TECHNICIAN WILL USE CH-51450-A (PICO OSCILLOSCOPE) TO MEASURE THE VIBRATION DISTURBANCE. IF THE VIBRATION CONCERN IS E1.5 IN THE HORIZONTAL / LATERAL DIRECTION WITH PICO SENSOR MOUNTED IN SEAT TRACK AS INDICATED CONTINUE WITH STEPS TO REDUCE THE AMPLITUDE OF THE VIBRATION BY ADDING SPACERS IN KEY LOCATIONS TO REDUCE GROUND OUT WITHIN THE ENGINE MOUNTS. THE 6.2L ENGINE HAS A CHARACTERISTIC E1 WHICH CAN BE FELT, AND MAY BE DESCRIBED AS A LOPEY IDLE. DO NOT CONFUSE 6.2L E1 CHARACTERISTIC (NOT CAUSED BY MOUNT GROUND-OUT), WITH E1.5 NORMAL IDLE CHARACTERISTICS BEING TRANSMITTED INTO THE TRUCK VIA GROUND-OUT THRU THE ENGINE MOUNTS. IF MEASURING HIGH AT THE SEAT TRACK 12 MG OR GREATER; REPLACEMENT OF THE ENGINE MOUNTS SHOULD HELP REDUCE THE AMPLITUDE OF THE VIBRATION. IF THE DISTURBANCE MEASURES AT THE SEAT TRACK AS E1.5 LATERAL IN THE RANGE OF APPROXIMATELY 2.5 - 8 MG USING A TRI-AXIS SENSOR. THEN PLACE TRI-AXIS PICO SENSOR ON THE INBOARD SEAT TRACK FORWARD-MOST LOCATION TO RECORD MEASUREMENT OF THE ROUGH IDLE VIBRATION CONCERN. WITH THE HEATER-VENT-AIR CONDITIONING ON PERFORM SEVERAL SHORT HEAVY LAUNCH EVENTS FROM STOP TO STOP TO BRING THE TEMPERATURES BACK UP WHILE ATTEMPTING TO RE-CREATE THE ROUGH IDLE VIBRATION IN DRIVE WITH PICO SENSOR PLACED ON INBOARD SEAT TRACK; WHILE THE VIBRATION IS ACTIVE RECORD PICO READING. THIS METHOD SEEMS TO PROVIDE BETTER RESULTS THAN EXTENDED TEST DRIVES. IF THE PICO READING FOR E1.5, WITH VIBRATION ACTIVE, AT SPECIFIED SEAT TRACK LOCATION MEASURES CLOSE TO 2MG OR LESS USE SERVICE INFORMATION TO DIAGNOSE ROUGH IDLE / VIBRATION.

VEHICLES THAT MAY HAVE A SHAKE OR SHUDDER DURING LIGHT THROTTLE ACCELERATION, BETWEEN 30 AND 65 MPH STEADY STATE DRIVING. ALSO SHUDDER FEELING THAT MAY BE DESCRIBED AS DRIVING OVER RUMBLE STRIPS OR ROUGH PAVEMENT. TECHNICIAN WILL DRIVE THE VEHICLE AND MONITOR THE TORQUE CONVERTER CLUTCH SLIP. THE TORQUE CONVERTER CLUTCH SLIP SPEED SHOULD BE 10 RPM OR LESS ALSO NOTE IF THE SHUDDER TAKES PLACE DURING TORQUE CONVERTER CLUTCH APPLY. IF THE TORQUE CONVERTER CLUTCH SLIP SPEED IS IN THE RANGE OF 10 RPM OR LESS THE CONDITION IS POSSIBLY RELATED TO ENGINE PERFORMANCE. IF THE SHUDDER IS ONLY PRESENT IN 4 CYLINDER MODE AND TORQUE CONVERTER CLUTCH SLIP IS 10 RPM OR LESS DEEM THE SHUDDER CONCERN NORMAL CHARACTERISTIC OF ACTIVE FUEL MANAGEMENT. IF THE SLIP SPEED IS BEYOND 10 RPM OR THERE IS SHUDDER DURING TORQUE CONVERTER CLUTCH APPLY THE TORQUE CONVERTER WILL NEED TO BE REPLACED.

ENGINE THAT RUNS ROUGH WITH A KNOCK NOISE AND OR BACKFIRE SOUND COMING FROM THE AIR FILTER. SOME VEHICLE MAY HAVE A SERVICE ENGINE SOON LAMP WITH DIAGNOSTIC TROUBLE CODES P0300-P0308 OR P0263, P0266, P0269, P0272, P0275, P0278, P0281, AND P0284. THE CAUSE OF THE CONCERN MAY BE THE RESULT OF A LACK OF LUBRICATION TO THE ROCKER ARMS AND VALVE TRAIN COMPONENTS. THE CAUSE OF THE LACK OF LUBRICATION MAY BE OIL FEED HOLES THROUGH THE HEAD GASKET(S) THAT ARE NOT COMPLETELY PUNCHED THROUGH. ONE OR BOTH HEAD GASKETS WILL NEED TO BE REPLACED.

VEHICLE WITH WI-FI OR BLUETOOTH INOPERATIVE OR POOR PERFORMANCE CONCERN. TECHNICIAN WILL NEED TO OBTAIN DATA FROM GLOBAL DIAGNOSTICS SERVICES 2 AND CALL GENERAL MOTORS TECHNICAL ASSISTANCE CENTER FOR FURTHER ASSISTANCE.

ON VEHICLES EQUIPPED WITH AN 8-SPEED AUTOMATIC TRANSMISSION, THE C-1-3-5-6-7 PISTON ASSEMBLY INTERNAL TO THE TRANSMISSION MAY BE OUT OF SPECIFICATION RESULTING IN POTENTIAL SHIFT QUALITY AND LONG TERM DURABILITY ISSUES. DEALERS ARE TO REPLACE THE TRANSMISSION.

THESE VEHICLES MAY HAVE LOOSE TRANSMISSION TO ENGINE FASTENERS. IMPROPER ALIGNMENT OF THE ENGINE AND TRANSMISSION COULD POTENTIALLY RESULT IN FLEX PLATE BREAKAGE. THE CUSTOMER MAY EXPERIENCE VIBRATION AND/OR NOISE. DEALERS ARE TO TO ALIGN THE TRANSMISSION TO THE ENGINE.

THE BOLTS CONNECTING THE TRANSMISSION TO THE ENGINE MAY NOT BE TIGHTENED TO SPECIFICATION ON THESE VEHICLES (SUBSEQUENTLY CONVERTED TO SERVICE UPDATE BULLETIN 41710).

replacement

feel or clunk noise at a stop or on launch. Dealer should communicate to the customer this condition is a normal operating characteristic

50 terminal test probe, replacement terminals, and terminated leads.

50 terminal test probe, replacement terminals, and terminated leads.

50 terminal test probe, replacement terminals, and terminated leads.

system and replace the parts that may be contaminated due to oil in system.

system and replace the parts that may be contaminated due to oil in system.

gooseneck hitch ball.

and repair procedures.

technical assistance case using the dealer case management tool.

and repair procedures.

working on a LIN bus.

U**** Byte 71 DTC.

Dealer should advise the customer the specification for speedometer needle accuracy is +/- 2 MPH at any given speed when looking straight at the needle.

Allegation Resolution (PAR) claim.

size pickups and how to correct and repair.

Allegation Resolution (PAR) claim.

size pickups and how to correct and repair.

working on a LIN bus.

and repair procedures.

gooseneck.

offered through GM.

and repair procedures.

U**** Byte 71 DTC.

gooseneck.

Allegation Resolution (PAR) claim.

offered through GM.

and repair procedures.

Only)

the differences between what is considered a fluid leak and what is considered seepage. Improper diagnosis may lead to unnecessary component replacement. Use the following information to determine if the condition is normal acceptable seepage or a defective component

Condition Some customers may comment that with the Info option selected from the main menu (1), the Info Pages are blank (2) when scrolling up and down. If information is present when scrolling up and down, they may also comment that certain items are missing when compared to other like vehicles Cause This condition may be caused when all/some of the options not being selected in the active info pages menu. Correction If this concern is encountered, determine if all/any of the selections in the active info pages menu are not selected. To do this, follow the steps listed below.

interiors of GM vehicles.

Technical Assistance (TAC).

normal operations.

and repair procedures.

Only).

verification sheets (CCVS).

click with a feel of increased resistance when the accelerator pedal is about of the way. The new accelerator pedal design has a built-in detent position near the last 1/4 of pedal travel. Dealer should communicate to the customer this is a normal operating characteristic of the vehicle and no repair attempts should be performed.

gooseneck.

causing multiple customer concerns that do not have other diagnostic methods to identify them.

Technical Assistance (TAC).

Dealer should advise the customer the specification for speedometer needle accuracy is +/- 2 MPH at any given speed when looking straight at the needle.

click type noise while driving.

customer.

size pickups and how to correct and repair.

to complete some repairs.

bar (Sports Bar) wind noise or rattle.

Technical Assistance (TAC).

click type noise while driving.

and repair procedures.

Technical Assistance (TAC).

verification sheets (CCVS).

column/drivers footwellarea when turning. It explains how to properly lubricate the column shaft boot where the shaft interacts with the bootwhere it passes through the boot.

If the vehicle is not equipped with Remote Vehicle Start RPO BTV the vehicle will not have Content Theft Deterrent.

from the openings under the bed rails near the stake pockets. Dealer should communicate to the customer this condition is a normal operating characteristic of their vehicle.

memory position.

click with a feel of increased resistance when the accelerator pedal is about ¾ of the way. The new accelerator pedal design has a built-in detent position near the last 1/4 of pedal travel. Dealer should communicate to the customer this is a normal operating characteristic of the vehicle and no repair attempts should be performed.

column/drivers foot well area when turning. It explains how to properly lubricate the column shaft boot where the shaft interacts with the boot where it passes through the boot.

part numbers for the labels.

pixelated

gooseneck.

to complete some repairs.

and how to correct and repair.

normal operations.

and repair procedures.

Alerts available on many models.

higher CSi scores.

Technician should check the Regular Production Option Code list for (VV4).

contact PQC prior to replacing an assembly (U.S. and Canada only).

from the openings under the bed rails near the stake pockets. Dealer should communicate to the customer this condition is a normal operating characteristic of their vehicle.

memory position.

dealer special tool loan program.

properly disable the SIR system for repairs at or near

information on the procedures around the spray in bed liners

connecting an Apple device via USB cord. Technician should insure the customer is using an original equipment manufacturer Apple USB cable.

click with a feel of increased resistance when the accelerator pedal is about ¾ of the way. The new accelerator pedal design has a built-in detent position near the last 1/4 of pedal travel. Dealer should communicate to the customer this is a normal operating characteristic of the vehicle and no repair attempts should be performed.

CUSTOMER HEARS A CLUNK WHEN STOPPING OR LAUNCHING.

THE VEHICLE MAY BE UNABLE TO CONNECT TO ONSTAR USING THE WHITE, BLUE OR RED ONSTAR BUTTONS.

BLACK SMOKE WHEN STARTING THE VEHICLE AFTER SITTING.

THE VEHICLE'S XM TRAVEL LINK MAY BE INOPERTIVE.

GM HAS NOT TESTED OR VALIDATED A CLIPPED VEHICLE REPAIR; THEREFORE, GM CANNOT ENDORSE THIS TYPE OF REPAIR OR CONFIRM THE CRASH PERFORMANCE DURING A SUBSEQUENT COLLISION.

LESS THAN 10,000 MILES ON IT.

INOPERATIVE OR UNABLE TO PLAY MUSIC THROUGH THE USB PORT.

MODE ON AND HOW TO TURN IT OFF.

not pass California smog inspection or smog inspection in other states.

programs.

causing multiple customer concerns that do not have other diagnostic methods to identify them.

E4398, E4399, E4401, E4403, M4404, M4413, M6954, M6955, E4414, E4423, E4491, E4492, or E6961 and resolution information.

Only).

programs.

before being sold (prepping) to the customer.

programs.

Only).

before being sold (prepping) to the customer.

shipped using Central Transport. Hazardous materials should never be sent by air transportation to the WPC.

Only).

programs.

(WPC) Parts Return Program.

identification for warranty transactions (U.S. Only).

and Canada Dealers Only).

submit a Pre-Repair Authorization (PRA).

Dealer Special Tool Loan Program process.

operation.

replacements.

Dealers Only).

E4398, E4399, E4401, E4403, M4404, M4413, M6954, M6955, E4414, E4423, E4491, E4492, or E6961 and resolution information.

repurchase from the customer, GM depends on the dealership to host and administer the repurchase closing and intake of the returning vehicle.

Whining/Whirring Noise, Shudder/Vibration and/or Grinding Noise While in 4HI, 4HI Auto and/or During Parking Lot Maneuvers in Auto Mode.

services and maintenance on vehicles originating/sold in Canada.

replacements.

the warranty transaction submission procedures that support the Personal Property Damage process.

Only).

before being sold (prepping) to the customer.

causing multiple customer concerns that do not have other diagnostic methods to identify them.

a fluid leak, and what is considered fluid seepage.

Assistance Center (TAC).

Only).

programs.

Stability Activation and/or a Service Stability message on the Driver Information Center. Technician may find a Diagnostic Trouble Code C0710. Technician should inspect for vehicles modifications before any in-depth diagnostics are performed.

shipped using Central Transport. Hazardous materials should never be sent by air transportation to the WPC.

E4403, M4404, M4413, M6954, M6955, E4414, E4423, E4491 or E6961).

Vibration Analysis-Road testing procedure when diagnosing vibration concerns.

Vehicle from Canada to the United States.

(WPC) Parts Return Program.

Only).

and Canada Dealers Only).

Only).

Only).

submit a Pre-Repair Authorization (PRA).

Vehicle from Canada to the United States.

submit a Pre-Repair Authorization (PRA).

warped or misshapen.

causing multiple customer concerns that do not have other diagnostic methods to identify them.

Dealer Special Tool Loan Program process.

Assistance Center (TAC).

Dealers Only).

Only).

Only).

Only).

Dealers Only).

vehicles before being sold (prepping) to the customer.

Spin-On Oil Filters.

to GM for payment.

identification for warranty transactions (U.S. Only).

operation.

Only).

Dealers Only).

Whining/Whirring Noise, Shudder/Vibration and/or Grinding Noise While in 4HI, 4HI Auto and/or During Parking Lot Maneuvers in Auto Mode.

the warranty transaction submission procedures that support the Personal Property Damage process.

Whining/Whirring Noise, Shudder/Vibration and/or Grinding Noise While in 4HI, 4HI Auto and/or During Parking Lot Maneuvers in Auto Mode.

(WPC) Parts Return Program.

Only).

E4403, M4404, M4413, M6954, M6955, E4414, E4423, E4491 or E6961).

and Canada.

Spin-On Oil Filters.

causing multiple customer concerns that do not have other diagnostic methods to identify them.

Only).

submit a Pre-Repair Authorization (PRA).

Only).

submit a Pre-Repair Authorization (PRA).

Only).

replacements.

warped or misshapen.

Spin-On Oil Filters.

vehicles before being sold (prepping) to the customer.

Dealers Only).

Spin-On Oil Filters.

independent causes (GM Canada Dealers Only).

replacements.

replacements.

Spin-On Oil Filters.

Stability Activation and/or a Service Stability message on the Driver Information Center. Technician may find a Diagnostic Trouble Code C0710. Technician should inspect for vehicles modifications before any in-depth diagnostics are performed.

Stability Activation and/or a Service Stability message on the Driver Information Center. Technician may find a Diagnostic Trouble Code C0710. Technician should inspect for vehicles modifications before any in-depth diagnostics are performed.

Pre-Repair Authorization (PRA) (US dealers only).

services and maintenance on vehicles originating/sold in Canada.

Enthusiasm.

vehicles before sold (prepping) to the customer.

to GM for payment.

DUE TO THE SPECIAL EQUIPMENT NEEDED TO PERFORM THE REQUIRED REPAIR, ALL INVOLVED VEHICLES WERE DIVERTED BY GM TO A DESIGNATED THIRD PARTY REPAIR FACILITY PRIOR TO DELIVERY TO FINAL DESTINATION DEALERS. AFFECTED DEALERS SHOULD HAVE BEEN CONTACTED BY THEIR DISTRICT MANAGER-AFTERSALES (DMA) OR A GM REPRESENTATIVE ADVISING OF THIS NECESSARY IN-TRANSIT REPAIR AND THE DELAYED DELIVERY OF THE VEHICLE. VEHICLES INVOLVED IN THIS RECALL WERE PLACED ON STOP DELIVERY OCTOBER 20, 2015 UNDER THE STOP DELIVERY ORDER FOR 15796. VEHICLES IN DEALER INVENTORY AND CUSTOMER VEHICLES WERE MOVED TO SAFETY RECALL 15794. VEHICLES THAT WERE CONTAINED AT THE VEHICLE DISTRIBUTION CENTER OR THE PLANT, WILL REMAIN UNDER THIS BULLETIN 15796. THIS BULLETIN PROVIDES DEALERS WITH IMPORTANT INFORMATION ABOUT SUBMITTING A WARRANTY TRANSACTION FOR FLOOR PLAN REIMBURSEMENT WHEN A REPAIRED VEHICLE ARRIVES AT A DEALERSHIP.

DUE TO THE SPECIAL EQUIPMENT NEEDED TO PERFORM THE REQUIRED REPAIR, ALL INVOLVED VEHICLES WERE DIVERTED BY GM TO A DESIGNATED THIRD PARTY REPAIR FACILITY PRIOR TO DELIVERY TO FINAL DESTINATION DEALERS. AFFECTED DEALERS SHOULD HAVE BEEN CONTACTED BY THEIR DISTRICT MANAGER-AFTERSALES (DMA) OR A GM REPRESENTATIVE ADVISING OF THIS NECESSARY IN-TRANSIT REPAIR AND THE DELAYED DELIVERY OF THE VEHICLE. VEHICLES INVOLVED IN THIS RECALL WERE PLACED ON STOP DELIVERY OCTOBER 20, 2015 UNDER THE STOP DELIVERY ORDER FOR 15796. VEHICLES IN DEALER INVENTORY AND CUSTOMER VEHICLES WERE MOVED TO SAFETY RECALL 15794. VEHICLES THAT WERE CONTAINED AT THE VEHICLE DISTRIBUTION CENTER OR THE PLANT, WILL REMAIN UNDER THIS BULLETIN 15796. THIS BULLETIN PROVIDES DEALERS WITH IMPORTANT INFORMATION ABOUT SUBMITTING A WARRANTY TRANSACTION FOR FLOOR PLAN REIMBURSEMENT WHEN A REPAIRED VEHICLE ARRIVES AT A DEALERSHIP.

REPRESENT KEY GM REQUIREMENTS FOR SERVICE OPERATIONS.

VEHICLES ORIGINATING/SOLD IN CANADA.

detection on vehicles produced by a second stage manufacturer (Upfitter), and/or turn signals flash fast after factory box removed.

information.

information.

intermittent no crank, no start, or start stall concern with the security light coming on. Technician may find Diagnostic Trouble Codes B3055, B3060, B3935, C0750, C0755, C0760, C0765, and/or C0775.

for certain repairs, such as Wiring Harness Repairs.

detection on vehicles produced by a second stage manufacturer (Upfitter), and/or turn signals flash fast after factory box removed.

information.

warranty replacements.

information.

a back-up alarm inoperative during the Pre-Delivery Inspection. On trucks equipped with the Back Up Alarm (RPO 8S3), the alarm will be intentionally left disconnected from the assembly plant. Technician will reroute the harness and plug it in.

information.

repairing wiring harnesses.

(U.S).

warranty replacements.

information.

that may be found on the inside windshield surface, and appears to be leaking from the rear view mirror area. Technician will remove the moisture sensor and clean the glass and mounting bracket with alcohol wipe. If the gel separates from the sensor the sensor will need to be replaced.

intermittent no crank, no start, or start stall concern with the security light coming on. Technician may find Diagnostic Trouble Codes B3055, B3060, and/or B3935. Technician should not replace any parts for this concern. If unable to duplicate the concern ask if the customer uses any Radio Frequency Identification Devices when the concern is present. Dealer should also direct their customers to the appropriate section in the Owner manuals that references that the device complies.

It provides the ability via a single selection within Techline Connect to first identify which modules need updating and then proceed to updating affected modules (with some exceptions). The updating of modules is completed in parallel instead of the technician needing to update one module at a time. This allows a more streamlined approach for dealers and customers.

procedure.

warranty replacements.

warranty replacements.

information.

information.

a back-up alarm inoperative during the Pre-Delivery Inspection. On trucks equipped with the Back Up Alarm (RPO 8S3), the alarm will be intentionally left disconnected from the assembly plant. Technician will reroute the harness and plug it in.

repairing wiring harnesses.

warranty replacements.

detection on vehicles produced by a second stage manufacturer (Upfitter), and/or turn signals flash fast after factory box removed.

intermittent no crank, no start, or start stall concern with the security light coming on. Technician may find Diagnostic Trouble Codes B3055, B3060, and/or B3935. Technician should not replace any parts for this concern. If unable to duplicate the concern ask if the customer uses any Radio Frequency Identification Devices when the concern is present. Dealer should also direct their customers to the appropriate section in the Owner manuals that references that the device complies.

warranty replacements.

detection on vehicles produced by a second stage manufacturer (Upfitter), and/or turn signals flash fast after factory box removed.

a back-up alarm inoperative during the Pre-Delivery Inspection. On trucks equipped with the Back Up Alarm (RPO 8S3), the alarm will be intentionally left disconnected from the assembly plant. Technician will reroute the harness and plug it in.

condition of MIL Illuminated with Multiple Fuel Trim and/or Oxygen Sensor Codes Set.

front shock electrical connector terminals. Technician will need to slightly bend the end of the J-38125-12A release tool. There is a purple Terminal Position Assurance that will align itself in the release position when the release tool is inserted into the release hole. There is a metal locking tab on the terminal that will need to be pushed in before the terminal will pull out of the connector.

front shock electrical connector terminals. Technician will need to slightly bend the end of the J-38125-12A release tool. There is a purple Terminal Position Assurance that will align itself in the release position when the release tool is inserted into the release hole. There is a metal locking tab on the terminal that will need to be pushed in before the terminal will pull out of the connector.

at g218, Inspecting for a short at the starter B+ to shield and testing for a faulty battery.

connector to correct a customer concern of Malfunction Indicator Lamp (MIL) Illuminated - DTC P0333 Set.

a back-up alarm inoperative during the Pre-Delivery Inspection. On trucks equipped with the Back Up Alarm (RPO 8S3), the alarm will be intentionally left disconnected from the assembly plant. Technician will reroute the harness and plug it in.

technicians may notice the TCM may fail during the reprogramming event and become unresponsive to the Service Programming System (SPS), unresponsive to the GDS2 tool. This bulletin addresses corrective actions to attempt to recover the module before declaring the TCM as a bad part and replacing. During reprogramming, an interruption can cause the module to lock up. A module reset may recover the TCM

The new electrical architecture for the Silverado and Sierra has made swapping mirrors a more involved procedure than with previous models. The recommendation has been divided into three upgrades, depending on which mirrors the truck was built with (RPO DE2, DL8 or DL3). Please follow the correct RPO group below, because not all camper mirrors can be installed on all trucks. After selecting the correct RPO mirror the truck was built with, this PI will aid in determining which camper mirrors can be installed.

battery cold cranking amperage (CCA) ratings and type are critical for proper test results when using the EL-50313. Access to the battery specification label, which contains the OEM part number and CCA rating and type, may be difficult without component removal. Refer to the table below for the original equipment ratings and part numbers used to set up a proper battery test. There has been some confusion as to the correct ACDelco battery warranty replacement. Refer to the table below for the correct battery warranty replacement. The correct ACDelco battery warranty replacement in the catalog is designated by the "Original Equipment Replacement" note in the description field.

Surging and Stalling Condition Some customers may comment that the Malfunction Indicator Light (MIL) is illuminated. Some customers may also comment on one or more of the following symptoms: Hesitation Surging Stalling Note: In ambient temperatures 100 F (37.7 C) degrees or higher, DTCs P2635 and/or P018B may set. The Technician may find one or more of the following DTCs set: P2635 P018B Cause This condition may be caused by a vapor buildup in fuel feed line. Correction If the conditions stated above are met, replace the fuel pump module with an updated version

The new electrical architecture for the Silverado and Sierra has made swapping mirrors a more involved procedure than with previous models. The recommendation has been divided into three upgrades, depending on which mirrors the truck was built with (RPO DE2, DL8 or DL3). Please follow the correct RPO group below, because not all camper mirrors can be installed on all trucks. After selecting the correct RPO mirror the truck was built with, this PI will aid in determining which camper mirrors can be installed.

a back-up alarm inoperative during the Pre-Delivery Inspection. On trucks equipped with the Back Up Alarm (RPO 8S3), the alarm will be intentionally left disconnected from the assembly plant. Technician will reroute the harness and plug it in.

a back-up alarm inoperative during the Pre-Delivery Inspection. On trucks equipped with the Back Up Alarm (RPO 8S3), the alarm will be intentionally left disconnected from the assembly plant. Technician will reroute the harness and plug it in.

(DIC) and/or Battery Light is Flashing and the procedures to turn the Transport Mode message ON and OFF.

the vent and route down the fuel feed line and secure with zip ties.

the vent and route down the fuel feed line and secure with zip ties.

power sliding rear window (RPO A48) may have areas of high electrical resistance on the rear defroster circuit. This could be caused, in part, by mechanical stress from opening and closing the rear power window, intrusion of debris, and use of the rear defroster. Over time, this condition could generate heat that could melt the areas surrounding the circuit. In rare instances, this heat could cause a non-propagating fire, increasing the risk of property damage or injury. Dealers will replace the buss bar covers and contact cover. If the rear window or sliding glass assembly appears damaged due to an occurrence of high electrical resistance on the rear defroster circuit, they should also be replaced.

applications.

at g218, Inspecting for a short at the starter B+ to shield and testing for a faulty battery.

these concerns remote keyless entry, passive Entry and Start Inoperative, No Fob detect message on driver information center, service tire pressure system, no audio, touch screen Inoperative, Steering Wheel Controls Inoperative, Service Stabilitrak, rear power windows inoperative, rear wiper inoperative, and or a dead battery. Technician may find Diagnostic Trouble Codes B3101, B144C, C0710, C0544, U1548, U1549, U154A, U0151, U0126, U0415, U0077, U0028 and/or U0029. Technician should inspect the left instrument panel for the wire harness being pinched. Technician will need to repair the wire harness and reroute the wire harness.

when replacing a module.

Wheel Drive" message on the Driver Information Center. Provides the technician with additional information to ensure that the TCCM contains the latest software released to address previous issues, also advises of default action changes. Calls out specific circuits to be inspected to help isolate intermittent codes.

position reverse tilt position is inoperative.

and/or Battery Light is Flashing and the procedures to turn the Transport Mode message On and Off.

detection on vehicles produced by a second stage manufacturer (Upfitter), and/or turn signals flash fast after factory box removed.

transactions when doing wiring repairs.

replacements.

Transport Bus Diagnostic Tool Kit (EL-51578) has been released to help diagnose any of the Media Oriented Systems Transport bus concerns. The kit contains header connectors that are installed to bypass Media Oriented Systems Transport bus modules. The bypass connector also contains a terminal for verifying Media Oriented Systems Transport control circuit voltages. Technician should review Media Oriented Systems Transport bus description and operation and Diagnostic Trouble Code U0028 diagnostic procedures.

intermittent no crank, no start, or start stall concern with the security light coming on. Technician may find Diagnostic Trouble Codes B3055, B3060, and/or B3935. Technician should not replace any parts for this concern. If unable to duplicate the concern ask if the customer uses any Radio Frequency Identification Devices when the concern is present. Dealer should also direct their customers to the appropriate section in the Owner manuals that references that the device complies.

front shock electrical connector terminals. Technician will need to slightly bend the end of the J-38125-12A release tool. There is a purple Terminal Position Assurance that will align itself in the release position when the release tool is inserted into the release hole. There is a metal locking tab on the terminal that will need to be pushed in before the terminal will pull out of the connector.

diagnostic trouble code U0159 set in the instrument panel cluster and/or the body control module. For vehicles equipped with Ultrasonic Park Assist System Regular Production Option Code UD5 or UD7 technician will use Service Programming System to reprogram the Parking Assist Control Module to correct this concern. Technician will need to inspect the front park assist sensors scallops/reliefs molded into the ring if previously replaced. Technician will need to replace the sensor rings with part number 84075328.

restriction for the Generator Control Module (GCM). The dealer technician is advised to call the GMTechnical AssistanceCenter for further assistance

malfunction ? may set DTC B2462, B2470 or B125C - and/or water leak on headliner at sun visor or overhead console areas, possible battery drain concern.

Loss of Steering Assist due to a software abnormality.

front camera module.

E5659, M5304, and/or M5530 may be displayed in TIS2web when the technician is programming any module. If this concern is encountered, the technician should start by ensuring that the module being programmed is not a used module and that the VIN matches on VIN plate, TIS2web programming screen, and GDS2 module identification information screen.

Waiting for Update Media Message, Voice Command For Calling Bluetooth Phone Contacts Inoperative, Intermittent Loss of Rear Camera Gridlines, Service Rear Vision System Message, Radio Turns On Unwanted At Startup, and/or Navigation Radio Destination State Defaults To WV, Intermittent Radio/display Resets, Volume Control Inoperative.

the DTC.

reprogram modules.

front camera module.

diagnostic trouble code U0159 set in the instrument panel cluster and /or the body control module. For vehicles equipped with Ultrasonic Park Assist System Regular Production Option Code UD5 or UD7 technician will use Service Programming System to reprogram the Parking Assist Control Module to correct this concern. Technician will need to inspect the front park assist sensors scallops/reliefs molded into the ring if previously replaced. Technician will need to replace the sensor rings with part number 84075328.

restriction for the A15, Starter Generator (MGU). The dealer technician is advised to call the GMTechnical AssistanceCenter for further assistance.

aftermarket bed cap or topper may question where they can wire in the center high mounted stop light for the cap or topper. Provisions for the center high mounted stop light have been provided at the Rear Body Junction Block (X63A) connector X6 terminal 1 for 2014-2015 model years. For vehicle model years 2016-2017 provisions for the center high mounted stop light have been provided at connector X400 terminal 4, circuit 1054.

intermittent no crank, no start, or start stall concern with the security light coming on. Technician may find Diagnostic Trouble Codes B3055, B3060, and/or B3935. Technician should not replace any parts for this concern. If unable to duplicate the concern ask if the customer uses any Radio Frequency Identification Devices when the concern is present. Dealer should also direct their customers to the appropriate section in the Owner manuals that references that the device complies.

Technician should turn off the ignition and cancel retained accessory power. After the vehicle has powered down remove power to the OnStar module for five minutes. After the power has been removed for five minutes, if the OnStar system is working release the vehicle. If the OnStar system is still inoperative continue with published Service Information diagnostics.

and booster packs.

long period of time and/or set in cold weather climates to correct a customer concern of symptoms that include, but not limited to, a slow or no crank condition that may be caused by a discharged battery.

temperature sensors.

Code U0121 will set and be moved to history in the FVCM with each ignition cycle.

additional information.

diagnostic trouble code U0159 set in the instrument panel cluster and /or the body control module. For vehicles equipped with Ultrasonic Park Assist System Regular Production Option Code UD5 or UD7 technician will use Service Programming System to reprogram the Parking Assist Control Module to correct this concern. Technician will need to inspect the front park assist sensors scallops/reliefs molded into the ring if previously replaced. Technician will need to replace the sensor rings with part number 84075328.

Wheel Drive" message on the Driver Information Center. Provides the technician with additional information to ensure that the TCCM contains the latest software released to address previous issues, also advises of default action changes. Calls out specific circuits to be inspected to help isolate intermittent codes.

powertrain control module.

TRANSPORT BUS DIAGNOSTIC TOOL KIT (EL-51578) HAS BEEN RELEASED TO HELP DIAGNOSE ANY OF THE MEDIA ORIENTED SYSTEMS TRANSPORT BUS CONCERNS. THE KIT CONTAINS HEADER CONNECTORS THAT ARE INSTALLED TO BYPASS MEDIA ORIENTED SYSTEMS TRANSPORT BUS MODULES. THE BYPASS CONNECTOR ALSO CONTAINS A TERMINAL FOR VERIFYING MEDIA ORIENTED SYSTEMS TRANSPORT CONTROL CIRCUIT VOLTAGES. TECHNICIAN SHOULD REVIEW MEDIA ORIENTED SYSTEMS TRANSPORT BUS DESCRIPTION AND OPERATION AND DIAGNOSTIC TROUBLE CODE U0028 DIAGNOSTIC PROCEDURES.

TECHNICIAN SHOULD TURN OFF THE IGNITION AND CANCEL RETAINED ACCESSORY POWER. AFTER THE VEHICLE HAS POWERED DOWN REMOVE POWER TO THE ONSTAR MODULE FOR FIVE MINUTES. AFTER THE POWER HAS BEEN REMOVED FOR FIVE MINUTES, IF THE ONSTAR SYSTEM IS WORKING RELEASE THE VEHICLE. IF THE ONSTAR SYSTEM IS STILL INOPERATIVE CONTINUE WITH PUBLISHED SERVICE INFORMATION DIAGNOSTICS.

CORRECT A CUSTOMER CONCERN THAT THE MALFUNCTION INDICATOR LIGHT (MIL) IS ILLUMINATED DUE TO EXCESSIVE SAND AND/OR DEBRIS ENTERING THE AIR FILTER BOX AND BYPASSING THE SEAL OF THE AIR FILTER CAUSING DAMAGE TO THE HO2 SENSOR AND THE CATALYTIC CONVERTER TO BECOME BLOCKED WITH SAND AND DEBRIS PARTICLES.

"SERVICE FRONT CAMERA" MESSAGE ON THE DRIVER INFORMATION CENTER INTERMITTENTLY. WHEN THE TECHNICIAN USES THE SCAN TOOL TO CHECK FOR DIAGNOSTIC TROUBLE CODES A HISTORY U023A AND/OR U026A MAY BE SET IN THE INSTRUMENT PANEL CLUSTER AND/OR BODY CONTROL MODULE. IT IS IMPORTANT THAT THE TECHNICIAN DOES NOT REPLACE THE FRONT VIEW CAMERA MODULE FOR THIS CONCERN. TECHNICIAN WILL REPROGRAM THE FRONT VIEW CAMERA MODULE WITH THE LATEST SOFTWARE USING SERVICE PROGRAMMING SYSTEM.

"SERVICE FRONT CAMERA" MESSAGE ON THE DRIVER INFORMATION CENTER INTERMITTENTLY. WHEN THE TECHNICIAN USES THE SCAN TOOL TO CHECK FOR DIAGNOSTIC TROUBLE CODES A HISTORY U023A AND/OR U026A MAY BE SET IN THE INSTRUMENT PANEL CLUSTER AND/OR BODY CONTROL MODULE. IT IS IMPORTANT THAT THE TECHNICIAN DOES NOT REPLACE THE FRONT VIEW CAMERA MODULE FOR THIS CONCERN. TECHNICIAN WILL REPROGRAM THE FRONT VIEW CAMERA MODULE WITH THE LATEST SOFTWARE USING SERVICE PROGRAMMING SYSTEM.

PANEL CLUSTER, RADIO, AND HEATER-VENT-AIR CONDITIONING DISPLAYS BLANKING OUT. ALSO BLUETOOTH DEVICES MAY DROP CONNECTION OR THE RADIO VOLUME CHANGES WHEN OPERATING THE SNOW PLOW. TECHNICIAN WILL REPLACE THE SNOW PLOW JUMPER HARNESS.

THIS BULLETIN PROVIDES A SERVICE PROCEDURE TO REPLACE THE SDM ON CERTAIN VEHICLES. THESE VEHICLES MAY HAVE A SMALL HAIRLINE CRACK IN ONE OF THE MOUNTING FEET SECURING THE SENSING AND DIAGNOSTIC MODULE TO THE FLOOR PAN OF THE VEHICLE. UNDER CERTAIN CONDITIONS, THE ISSUE COULD POTENTIALLY CAUSE THE SDM TO NOT PERFORM AS INTENDED. IF THE SDM DOES NOT PERFORM AS INTENDED, THERE MAY BE A RISK OF OCCUPANT INJURY.

LINE ACROSS GPS INDICATOR OR THE LOCATION IS STUCK IN WARREN MICHIGAN.

A DPF REGENERATION OR A REDUCTANT FLUID QUALITY TEST.

RECEIVING FREQUENT "OFF ROUTE" MESSAGES WHILE FOLLOWING TURN BY TURN (TBT) ROUTE NAVIGATION. THE TECHNICIAN IS PROVIDED INSTRUCTIONS FOR RESETTING THE VEHICLE COMMUNICATION INTERFACE MODULE FOR THIS CONCERN.

DRAIN TEST FOR THE ONSTAR MODULE. WHEN PERFORMING BATTERY PARASITIC DRAIN TEST, THERE MAY BE SOME CONFUSION AS TO WHAT THE NORMAL POWER CONSUMPTION READING SHOULD BE FROM THE ONSTAR SYSTEM.

THEFT LEARN IT MAY NOT COMPLETE AND/OR SHOW "CONTROLLER ID NOT SUPPORTED" AFTER THE FIRST FEW MINUTES INTO THE LEARN EVENT. TECHNICIAN WILL NEED TO REMOVE POWER FROM THE ONSTAR MODULE BEFORE PERFORMING A IMMOBILIZER THEFT LEARN.

A BACK-UP ALARM INOPERATIVE DURING THE PRE-DELIVERY INSPECTION. ON TRUCKS EQUIPPED WITH THE BACK UP ALARM REGULAR PRODUCTION OPTION CODE (8S3), THE ALARM WILL BE INTENTIONALLY LEFT DISCONNECTED FROM THE ASSEMBLY PLANT. TECHNICIAN WILL REROUTE THE HARNESS AND PLUG IT IN.

BACKLIGHTING WILL STAY ON EVEN AFTER THE IGNITION HAS BEEN TURNED OFF AND THE KEY HAS BEEN REMOVED FOR SEVERAL MINUTES, EVENTUALLY THE BATTERY WILL DRAIN. TECHNICIAN MAY FIND FOLLOWING FUSES F23DL F22DL F30DL F31DL F32DL WITH THE IGNITION KEY IN THE OFF POSITION TO HAVE VOLTAGE. TECHNICIAN SHOULD NOT REPLACE THE TRANSFER CASE CONTROL MODULE. TECHNICIAN WILL NEED TO INSTALL A DIODE, PART NUMBER 12112422, ACROSS THE COIL OF THE SOLENOID. IT IS IMPORTANT THAT THE STRIPED END OF THE DIODE BE CONNECTED TO THE POSITIVE TERMINAL OF THE COIL AND THE OTHER END OF THE DIODE BE CONNECTED TO GROUND.

MESSAGE DISPLAYED IN THE DRIVER INFORMATION CENTER. TECHNICIAN MAY FIND DIAGNOSTIC TROUBLE CODES C0392 OR C0396. TECHNICIAN SHOULD CHECK THE TERMINAL TENSION ON THE TRANSFER CASE CONTROL MODULE X1 CONNECTOR. TECHNICIAN SHOULD REPAIR ANY TERMINAL THAT HAVE POOR TERMINAL TENSION.

VEHICLES AND APPLYING A QR CODE STICKER OR BARCODE STICKER TO THE FOB.

TO BE INSTALLED ON VEHICLES IF THERE IS ACCESSORY WHEELS INSTALLED AND WHO TO CONTACT WHEN THE ACCESSORY WHEELS WILL NOT LEARN THE TPM'S TO THE VEHICLES.

REPLACEMENT.

IT IS IMPERATIVE THAT ALL RELATED TERMINAL PIN FIT AND TENSION BE CHECKED WHEN THE TEST STEPS REQUIRE DISCONNECTION OF THE CONNECTOR OR COMPONENT, PRIOR TO ANY COMPONENT REPLACEMENT. ALWAYS USE THE RECOMMENDED TERMINAL TEST TOOL DURING THESE TESTS.

ON ALL NEW GENERATION INFOTAINMENT SYSTEMS WITH REGULAR PRODUCTION OPTION CODE U42 OR UWG BLU-RAY PLAYERS. IF THIS CONCERN IS ENCOUNTERED, CYCLE THE CD PLAYER/MEDIA DISC PLAYER FUSE AND RE-EVALUATE THE CONCERN.

VEHICLES EQUIPPED WITH THE FULL SIZE SPARE TIRE AND ROAD WHEEL OPTION MAY HAVE BEEN BUILT WITHOUT A TIRE PRESSURE MONITORING (TPM) SENSOR INSTALLED IN THE SPARE TIRE. IF THE SPARE TIRE WAS TO BE USED AND THE TPM SYSTEM IS PROGRAMMED TO COORDINATE WITH THE WHEELS IN USE, A TIRE PRESSURE MONITOR SYSTEM ERROR WOULD BE DISPLAYED DUE TO THE LACK OF A SENSOR IN THE SPARE TIRE. DEALERS ARE TO INSTALL A TPM SENSOR IN THE SPARE TIRE.

ordering

ordering

the throttle plate is opened rapidly and advises the customer that it is normal for the delay.

repair of 8 Speed Transmissions

due to seeing grease or sealant on certain locations on the gear.

Slips, or Flares.

engagement into drive, shudder at a launch, or the transmission is slipping when shifting into 1st, 2nd, 3rd or 4th gears. This may be due to loose stator support to pump cover bolts causing a leak at the stator support to pump cover gasket. Technician will check for the bolts to be loose. If any of the bolts are loose or the gasket is misaligned or leaking, the transmission pump cover must be replaced and the 1234 clutch plates should be inspected for being distressed and repaired as needed.

contact Technical Assistance to make sureunit is not suspect of a snap ring concern prior to installation.

software to aid in diagnosing automatic transmission concerns. TAC is requesting the GDS2 session logs be sent in before the dealer contacts TAC.

found the cause of the customers concern of No Forward Gear When Shifting from Park to Drive and/or Reverse to Drive.

found the cause of the customers concern of No Forward Gear When Shifting from Park to Drive and/or Reverse to Drive.

The damage is being caused either in the removal process by the technician, or inadequate packaging or shipping. This bulletin advises the dealers to be more careful not to damage the transmissions during removal and to package the core properly for return.

found the cause of the customers concern of No Forward Gear When Shifting from Park to Drive and/or Reverse to Drive.

Slips, or Flares.

found the cause of the customers concern of No Forward Gear When Shifting from Park to Drive and/or Reverse to Drive.

transmission installation.

Start Up/Shift of the Day Under Light Throttle.

The concern is present when coasting at low speeds of less than 15 miles per hour and then aggressively applying the throttle, or after making a hard stop followed by an aggressive throttle. This concern may also be present while cruising at highway speeds and then an aggressive increase in throttle.This is considered normal operation of the vehicle the throttle is delayed and opened slowly up to .7 seconds to help minimize driveline lash and clunking or will have approximately .5 seconds of zero torque to allow the transmission to shift to downshift.

Conditions

t-case or transmission leaking ATF, causing the customer concern of a Red Fluid Leak from Center of Vehicle Located by Rear of Transmission or Transfer Case Area.

Start Up/Shift of the Day Under Light Throttle.

the throttle plate is opened rapidly and advises the customer that it is normal for the delay.

Slips, or Flares.

Slips, or Flares.

Slips, or Flares.

transmission leaking ATF causing the customers concern.

engagement into drive, shudder at a launch, or the transmission is slipping when shifting into 1st, 2nd, 3rd or 4th gears. This may be due to loose stator support to pump cover bolts causing a leak at the stator support to pump cover gasket. Technician will check for the bolts to be loose. If any of the bolts are loose or the gasket is misaligned or leaking, the transmission pump cover must be replaced and the 1234 clutch plates should be inspected for being distressed and repaired as needed.

after the vehicle has been sitting for a period of time. Technician can update the Transmission Control Module if working on a model year 2007. On all other model years dealer should communicate to the customer this condition is a normal operating characteristic of their vehicle.

software to aid in diagnosing automatic transmission concerns. TAC is requesting the GDS2 session logs be sent in before the dealer contacts TAC.

seal and which seal should be used with measurements of the seal.

no problem was found, to replace the tbv.

no problem was found, to replace the tbv.

due to seeing grease or sealant on certain locations on the gear.

test.

Slips, or Flares.

to shift the t-case from 4lo to Hi gears while driving.

no problem was found, to replace the tbv.

for metal.

Some customers or technicians may comment on seeing grease or sealant on certain locations of the steering gear. The illustrations below include arrows showing the areas on the steering gear that the supplier intentionally applies sealing grease. Any of these locations have the potential of showing visible grease under normal operation.

engagement into drive, shudder at a launch, or the transmission is slipping when shifting into 1st, 2nd, 3rd or 4th gears. This may be due to loose stator support to pump cover bolts causing a leak at the stator support to pump cover gasket. Technician will check for the bolts to be loose. If any of the bolts are loose or the gasket is misaligned or leaking, the transmission pump cover must be replaced and the 1234 clutch plates should be inspected for being distressed and repaired as needed.

repaired for the flare and its still noticed.

fluid and adding the new fluid to correct a shake/shudder during light throttle acceleration condition.

normal characteristic.

in addressing torque converter clutch shudder concerns.

The concern is present when coasting at low speeds of less than 15 miles per hour and then aggressively applying the throttle, or after making a hard stop followed by an aggressive throttle. This is considered normal operation of the vehicle the throttle is delayed and opened slowly up to .7 seconds to help minimize driveline lash and clunking or will have approximately .5 seconds of zero torque to allow the transmission to shift to first gear.

test.

each scenario and documenting findings. This technical bulletin provides a procedure to install dust deflectors when replacing wheel bearings on vehicles no matter what the concern is of the vehicle. This technical bulletin provides a procedure to reprogram the TRCM to correct the customers concern of the Service Transmission and MIL on. This technical bulletin provides a procedure to reprogram the FVCM if the battery has issues that are related to the front camera module.

gear due to seeing grease or sealant on certain locations on the gear.

THIS BULLETIN PROVIDES A SERVICE PROCEDURE TO DO AN INSPECTION AND WIRE REPAIR AS NEEDED ON CERTAIN 2016 MODEL YEAR CHEVROLET SILVERADO HD, SILVERADO LD, GMC SIERRA HD AND SIERRA LD VEHICLES. THESE VEHICLES MAY HAVE THE CONDITION WHERE THE BRAKE CLUTCH HARNESS BRANCH TO THE ACCELERATOR PEDAL POSITION (APP) SENSOR CAN GET TRAPPED UNDER THE TOP MBEC (BODY WIRING HARNESS JUNCTION BLOCK) MOUNTING LEG TO THE BRAKE PEDAL BRACKET.

THIS BULLETIN PROVIDES A SERVICE PROCEDURE TO DO AN INSPECTION AND WIRE REPAIR AS NEEDED ON CERTAIN 2016 MODEL YEAR CHEVROLET SILVERADO HD, SILVERADO LD, GMC SIERRA HD AND SIERRA LD VEHICLES. THESE VEHICLES MAY HAVE THE CONDITION WHERE THE BRAKE CLUTCH HARNESS BRANCH TO THE ACCELERATOR PEDAL POSITION (APP) SENSOR CAN GET TRAPPED UNDER THE TOP MBEC (BODY WIRING HARNESS JUNCTION BLOCK) MOUNTING LEG TO THE BRAKE PEDAL BRACKET.

PREVIOUS REPAIRS AND/OR CALIBRATION UPDATES.

VEHICLES AND TRANSMISSIONS BASED ON RPO OPTIONS TO CORRECT A CONDITION OF HARSH SHIFTS ON HARD ACCELLERATIONS.

VEHICLES EQUIPPED WITH A 6-SPEED AUTOMATIC TRANSMISSION (RPO MW7) MAY HAVE A CONDITION IN WHICH THE PARK PAWL DOES NOT MEET THE REQUIRED HARDNESS SPECIFICATIONS. THIS MAY FRACTURE THE PARK PAWL CAUSING THE VEHICLE TO ROLL AWAY OR MOVE WHILE IN PARK ON AN INCLINED SURFACE DUE TO THE PARK PAWLS INABILITY TO HOLD THE VEHICLE IN PARK. DEALERS ARE TO REPLACE THE PARK PAWL.

VEHICLE MAY HAVE AN INTERMITTENT "SERVICE POWER STEERING, DRIVE WITH CARE" ON THE DRIVER INFORMATION CENTER AND A DIAGNOSTIC TROUBLE CODE C0545 SYMPTOM 00 SET IN THE POWER STEERING CONTROL MODULE. OR THE VEHICLE MAY HAVE INOPERATIVE AIR CONDITION CAUSED BY ANY OF THE FOLLOWING DIAGNOSTIC TROUBLE CODE B393B, FUSE F60UA OR F35UA BEING OPEN, OR A POOR AIR CONDITION COMPRESSOR CLUTCH GROUND. TECHNICIAN WILL GAIN ACCESS TO THE WIRE HARNESS UNDER THE AIR CONDITION COMPRESSOR, INSPECT FOR DAMAGE WIRES AND REPAIR THE WIRES.

BEEN PLACED ON PARTS RESTRICTION. TECHNICIAN WILL NEED TO CONTACT PRODUCT QUALITY CENTER TO DETERMINE IF THE TRANSMISSION NEEDS TO BE REPLACED.

IF THE DIAGNOSTIC TROUBLE CODE P0777 IS CURRENT IN THE TRANSMISSION CONTROL MODULE FOLLOW THE CURRENT SERVICE INFORMATION DIAGNOSTICS FOR DTC P0777. WHEN THE DIAGNOSTIC TROUBLE CODE P0777 IS HISTORY IN THE TRANSMISSION CONTROL MODULE DO NOT PERFORM ANY REPAIRS A NEW CALIBRATION WILL BE RELEASED SOON IN SERVICE PROGRAMMING SYSTEM.

analysis.

additive.

additive.

the Tire Pressure Monitor, Active Fuel Injector tester, multi media tester, PICO Scope, GR8 starting/charging tester and Vehicle Data Recorder tools, giving website address and step by step instructions to complete the update.

cause of excessive soot from the tailpipe.

Licensed Brands that are recommended for use in all GM vehicles and the TOP TIER FUELS website URL.

additive.

that may have rattle or ticking noise that is louder inside the vehicle than outside. The noise may also sound like a lifter tick. If the noise is heard best at the fuel line and the sound will be real loud with a stethoscope. The fuel line will need to be replaced.

feel or clunk noise at a stop or on launch. Dealer should communicate to the customer this condition is a normal operating characteristic of their vehicle. The bump clunk issue may be due to fuel movement in the fuel tank when not completely full. The condition is eliminated after completely filling the fuel tank.

Keep Driving Until Message is Cleared messages Displayed on DIC, DTC P2463 May Be Set.

additive.

cause of excessive soot from the tailpipe.

Filter Keep Driving Until Message is Cleared messages Displayed on DIC, DTC P2463 May Be Set.

feel or clunk noise at a stop or on launch. Dealer should communicate to the customer this condition is a normal operating characteristic of their vehicle. The bump clunk issue may be due to fuel movement in the fuel tank when not completely full. The condition is eliminated after completely filling the fuel tank.

customer concern of an MIL Illuminated with DTCs P0442 and/or P0455 Set.

cause of excessive soot from the tailpipe.

Filter Keep Driving Until Message is Cleared messages Displayed on DIC, DTC P2463 May Be Set.

Licensed Brands that are recommended for use in all GM vehicles and the TOP TIER FUELS website URL.

additive.

additive.

driver information Center Messages

DIC, DTC P2463 May be set

Driver Information Center Messages

DIC, DTC P2463 May Be Set

Filter Keep Driving Until Message is Cleared messages Displayed on DIC, DTC P2463 May Be Set.

Licensed Brands that are recommended for use in all GM vehicles and the TOP TIER FUELS website URL.

using the evaporative emission cart smoke machine and ultrasonic leak detectortools.

contacting the drive shaft.

fuel system causing the vehicle to have a hard or no start.

tool parameters to reference when encountering an: Exhaust Fluid Quality Poor message displayed, and a Reductant Fluid Quality Test status that will Pass, Time Out, Fail or Interrupt and other DEF messages that maybe observed.

injector may need to be removed for a repair or replaced the injector will need a new seal. This Preliminary Information contains all the O-ring seal and the injector kit part numbers.

chirp type noise from the rear of the vehicle. Technician should use the latest version of PI1201. If the noise is gone replace the muffler and tail pipe assembly.

FLUID QUALITY POOR ON THE DRIVER INFORMATION CENTER OR A DIESEL EXHAUST FLUID WARNING LAMP ON OR OTHER EXHAUST FLUID QUALITY RELATED CONCERNS. TECHNICIAN WILL INSPECT THE DIESEL EXHAUST FLUID FOR CONTAMINATION. TECHNICIAN SHOULD USE SERVICE INFORMATION FOR CONTAMINANTS IN DIESEL EXHAUST FLUID DIAGNOSIS AND USE SPECIAL TOOL J26568 OR EN50422 DIESEL EXHAUST FLUID REFRACTOMETER FOR FLUID TESTING.

DEALER CAN NOW ORDER THE PARTS THROUGH THE REGULAR CUSTOMER CARE AND AFTERSALES PARTS PROCESS.

RATTLE OR TICKING NOISE THAT IS LOUDER INSIDE THE VEHICLE THAN OUTSIDE. INSTRUCTIONS ARE PROVIDED TO INSPECT THE FUEL FEED LINE BETWEEN THE HIGH PRESSURE FUEL PUMP AND CHASSIS FUEL LINE.

THAT MAY HAVE RATTLE OR TICKING NOISE THAT IS LOUDER INSIDE THE VEHICLE THAN OUTSIDE. THE NOISE MAY ALSO SOUND LIKE A LIFTER TICK. IF THE NOISE IS HEARD BEST AT THE FUEL LINE AND THE SOUND WILL BE REAL LOUD WITH A STETHOSCOPE. THE FUEL LINE WILL NEED TO BE REPLACED.

MACHINE INTERFACE WITH REGULAR PRODUCTION OPTION CODE U42 OR UWG WILL BE CURRENT WHEN PLAYING A DVD OR BLU-RAY ON THE INTEGRATED CENTER STACK DISPLAY. WHEN THE DISC IS EJECTED THE DIAGNOSTIC TROUBLE CODE WILL BE HISTORY. IF THE DIAGNOSTIC TROUBLE CODE B127E REMAINS CURRENT AFTER EJECTING THE DISC FOLLOW SERVICE INFORMATION DIAGNOSTIC PROCEDURE INSTRUCTIONSFOR B127E WITH REGULAR PRODUCTION OPTION CODE U42 OR UWG.

RATTLE OR TICKING NOISE THAT IS LOUDER INSIDE THE VEHICLE THAN OUTSIDE. INSTRUCTIONS ARE PROVIDED TO INSPECT THE FUEL FEED LINE BETWEEN THE HIGH PRESSURE FUEL PUMP AND CHASSIS FUEL LINE.

Peeling, Metal Shows Corrosion/Rusting due to issue with getting product from current supplier listed in the bulletin.

Peeling, Metal Shows Corrosion/Rusting due to issue with getting product from current supplier listed in the bulletin.

addressing underbody component corrosion with customers.

have the condition of Tire Slowly Goes Flat, Tire Air Loss, Low Tire Pressure Warning Light Illuminated, Aluminum Wheel Bead Seat Corrosion.

peeling, metal shows corrosion/rusting (U.S. and Canada Only).

shipping film.

Guidelines.

peeling, metal shows corrosion/rusting (U.S. and Canada Only).

characteristic.

Aluminum Wheels.

Seats, Carpet, Leather, Vinyl, Fabric Cleaner, Stain Remover, Restorer - Product Availability.

coating on frame peeling, metal shows corrosion/rusting (U.S. and Canada Only).

coating on frame peeling, metal shows corrosion/rusting (U.S. and Canada Only).

addressing underbody component corrosion with customers.

coating on frame peeling, metal shows corrosion/rusting (U.S. and Canada Only).

Guidelines.

addressing underbody component corrosion with customers.

characteristic.

Replacement Guidelines.

coating on frame peeling, metal shows corrosion/rusting (U.S. and Canada Only).

Customer's sunroof operation intermittent, bind, noise, auto-reverse, and/or water leaks.

addressing underbody component corrosion with customers.

front camera is loose or that the mirror/camera mounting bracket is loose or has fallen off. If a vehicle is encountered with the above condition, do not attempt to reinstall the bracket onto the windshield. The above listed vehicles have a revised bracket design that is not serviceable. It is necessary to replace the windshield glass assembly. The bracket comes installed on the new glass assembly. Refer to Windshield Replacement in SI.

addressing underbody component corrosion with customers.

front side door glass area.

Customer's sunroof operation intermittent, bind, noise, auto-reverse, and/or water leaks.

code is 598F that is Anthracite color.

fob range.

Technician should not replace any parts for this concern. Please communicate to the customer this condition is a normal operating characteristic of their vehicle.

in the bed.

noise in the vehicle from the driver or passenger side. Technician will need to inspect for voids in the body sealer on the left or right side A-pillar. Technician should also inspect for voids in the body sealer at the cowl seam and apply sealer as necessary.

driver's or passenger's seat back may lean or be turned outward. Technician will need to remove the seat bottom trim cover and reinstall it completely and squarely to the cushion to correct the concern.

front side door glass area.

mirror and the reverse tilt

paint being made available in order to match the paint on trucks exhibiting a lighter color due to mis-application at the plant.

driver or passenger front door armrest area.

rearview mirrors on a vehicle not originally equipped with them.

OR RIPPLE APPEARANCE IN THE SIDE OUTER PANEL OF THE CARGO BOX AROUND THE PERIMETER OF THE WHEEL HOUSE OPENING. TECHNICIAN SHOULD FIRST ACCESS THE REAR OF THE INNER WHEELHOUSE AREA THROUGH THE TAIL LAMP CAVITY AND THE FRONT OF THE WHEELHOUSE FROM UNDER THE VEHICLE, AND COAT THE INNER HEM OF THE WHEEL HOUSE TO SIDE OUTER PANEL WITH 3M RUST FIGHTER I. AFTER ALLOWING THE 3M RUST FIGHTER I TO DRY THEN APPLY SEVERAL COATS OF NOX RUST X-121B UNDERCOATING PART NUMBER 12346501.

MARKS ON THE TAILGATE.

VEHICLE'S SUNROOF OPERATION INTERMITTENT, BIND, NOISE, AUTO-REVERSE, AND/OR WATER LEAKS.

OVERRUNNING THE POWER REAR SLIDER WINDOW CHANNEL.

strut due to fluid leak.

strut due to fluid leak.

that may have a "Check Trailer Wiring" or "Service Trailer Brake System message on the Driver Information Center when a trailer is connected to the vehicle. Diagnostic Trouble Code C1114 set in the Chassis Control Module. Chassis Control Module has to determine the type of trailer brake system that is being used. The Chassis Control Module can be sensitive to a variety of trailer wiring issues. The technician will need to make a trailer tester using Electric Trailer Brake Magnets and 7-way trailer connector to determine if it is a vehicle or trailer issue. If the concern is not duplicated with the tester installed, the vehicle is operating correctly and the focus should be on the trailer wiring or 7 way connector.

causing a voltage spike into the trucks electrical system which is causing DTC C1114 to set.

disk on gasket sealing surfaces or reused parts.

that may have a "Check Trailer Wiring" or "Service Trailer Brake System? message on the Driver Information Center when a trailer is connected to the vehicle. Diagnostic Trouble Code C1114 set in the Chassis Control Module. Chassis Control Module has to determine the type of trailer brake system that is being used. The Chassis Control Module can be sensitive to a variety of trailer wiring issues. The technician will need to make a trailer tester using Electric Trailer Brake Magnets and 7-way trailer connector to determine if it is a vehicle or trailer issue. If the concern is not duplicated with the tester installed, the vehicle is operating correctly and the focus should be on the trailer wiring or 7 way connector.

disk on gasket sealing surfaces or reused parts.

to be replaced if the brake pedal moves or applies on its own at a full turn.

disk on gasket sealing surfaces or reused parts.

that may have a "Check Trailer Wiring" or "Service Trailer Brake System? message on the Driver Information Center when a trailer is connected to the vehicle. Diagnostic Trouble Code C1114 set in the Chassis Control Module. Chassis Control Module has to determine the type of trailer brake system that is being used. The Chassis Control Module can be sensitive to a variety of trailer wiring issues. The technician will need to make a trailer tester using Electric Trailer Brake Magnets and 7-way trailer connector to determine if it is a vehicle or trailer issue. If the concern is not duplicated with the tester installed, the vehicle is operating correctly and the focus should be on the trailer wiring or 7 way connector.

vehicles that may have an intermittent "Check Trailer Wiring" or "Service Trailer Brake" message on the Driver Information Center. Technician will inspect and clean the ground wire (normally white wire) connection on the trailer side of the 7-pin connector. Inspect that the wires inside the trailer side connector are clean and securely fastened. If the vehicle?s 7-way connector socket terminals are deformed or have excessive wear, it will be necessary to replace the truck side connector with part number 23404450.

to be replaced if the brake pedal moves or applies on its own at a full turn.

Traction control lights/message on, Service Power Steering System, Service Suspension System, and or Loss of communication with EBCM, SWPS, PSCM, and/or SCM. Technician may find Diagnostic Trouble Codes U0077, U0121, U0126, U0131, U0139, U0401, U0415, and/or U0428. Technician should remove the driver and passenger sill plate to gain access to the wire harness. If any open, damaged, or corroded wires should be repaired.

repair vehicles that may have uneven brake pad wear. Technician will need to inspect and measure the brake pads thickness. Also determine the customer?s driving style. The disc brake pads should only be replaced if the friction surface is worn to within 2.0 mm (0.079 in) of the mounting plates. The rotors and pads should be replaced with the updated part number If the pads are out of specification, perform normal Service Information diagnostics to determine the cause of the concern.

vehicles that may have an intermittent "Check Trailer Wiring" or "Service Trailer Brake" message on the Driver Information Center. Technician will inspect and clean the ground wire (normally white wire) connection on the trailer side of the 7-pin connector. Inspect that the wires inside the trailer side connector are clean and securely fastened. If the vehicle?s 7-way connector socket terminals are deformed or have excessive wear, it will be necessary to replace the truck side connector with part number 23404450.

that may have a "Check Trailer Wiring" or "Service Trailer Brake System” message on the Driver Information Center when a trailer is connected to the vehicle. Diagnostic Trouble Code C1114 set in the Chassis Control Module. Chassis Control Module has to determine the type of trailer brake system that is being used. The Chassis Control Module can be sensitive to a variety of trailer wiring issues. The technician will need to make a trailer tester using Electric Trailer Brake Magnets and 7-way trailer connector to determine if it is a vehicle or trailer issue. If the concern is not duplicated with the tester installed, the vehicle is operating correctly and the focus should be on the trailer wiring or 7 way connector.

connection not recognized or “Check Trailer wiring” or “Service Trailer Brake” message. Technician may find Diagnostic Trouble Codes C1112, C1113, C1114, C111B, U1556, and/or U1505. Technician will need to inspect the battery and Trailer Brake Power Module connector for corroded terminals and replace as necessary.

Certain 2016 model year Chevrolet Silverado and GMC Sierra work trucks equipped with Power Outside Rear View Mirrors (RPO DL8 or DPN) were built without mirror switches, bezels and the associated wire harness. A part release change regarding door pad construction was missed during the assembly process. To correct this condition, dealers will install a mirror switch, bezel and wire harness in each involved vehicle.

concern of seeing a white film/residue on the IP pad and/or door trim panels.

displayed on the Driver Information Center (DIC). During diagnosis, a technician may find DTC C0196-5A set in the Electronic Brake Control Module (EBCM).

FACTORY INTEGRATED TRAILER BRAKE CONTROLLER REGULAR PRODUCTION OPTION CODE (JL1) BE INSTALLED ON THEIR FULL-SIZE PICKUP OR SUV WHEN THE VEHICLE WAS NOT ORDERED WITH THE OPTION. DEALER SHOULD ADVISE THE CUSTOMER IT CANNOT BE ADDED TO THE VEHICLE.

REPAIR VEHICLES THAT MAY HAVE UNEVEN BRAKE PAD WEAR. TECHNICIAN WILL NEED TO INSPECT AND MEASURE THE BRAKE PADS THICKNESS. ALSO DETERMINE THE CUSTOMERS DRIVING STYLE. THE DISC BRAKE PADS SHOULD ONLY BE REPLACED IF THE FRICTION SURFACE IS WORN TO WITHIN 2.0 MM (0.079 IN) OF THE MOUNTING PLATES. THE ROTORS AND PADS SHOULD BE REPLACED WITH THE UPDATED PART NUMBER IF THE PADS ARE OUT OF SPECIFICATION, PERFORM NORMAL SERVICE INFORMATION DIAGNOSTICS TO DETERMINE THE CAUSE OF THE CONCERN.

IF THE BRAKE PEDAL BECOMES LOOSE OR INOPERATIVE, THE DRIVER MAY BE UNABLE TO SAFELY STOP THE VEHICLE THROUGH APPLICATION OF THE BRAKE PEDAL, INCREASING THE RISK OF A CRASH. A LOOSE PEDAL MAY ALSO INTERFERE WITH THE ACCELERATOR PEDAL, INCREASING THE RISK OF A CRASH

THE VEHICLE MAY HAVE A SERVICE ANTILOCK BRAKING SYSTEM, TRACTION CONTROL, POWER STEERING OR SUSPENSION SYSTEM MESSAGE ON THE DRIVERS INFORMATION CENTER.

TERMINAL REMOVAL.

IF THE BRAKE PEDAL BECOMES LOOSE OR INOPERATIVE, THE DRIVER MAY BE UNABLE TO SAFELY STOP THE VEHICLE THROUGH APPLICATION OF THE BRAKE PEDAL, INCREASING THE RISK OF A CRASH. A LOOSE PEDAL MAY ALSO INTERFERE WITH THE ACCELERATOR PEDAL, INCREASING THE RISK OF A CRASH.

THAT MAY HAVE A "CHECK TRAILER WIRING" OR "SERVICE TRAILER BRAKE SYSTEM MESSAGE ON THE DRIVER INFORMATION CENTER WHEN A TRAILER IS CONNECTED TO THE VEHICLE. DIAGNOSTIC TROUBLE CODE C1114 SET IN THE CHASSIS CONTROL MODULE. CHASSIS CONTROL MODULE HAS TO DETERMINE THE TYPE OF TRAILER BRAKE SYSTEM THAT IS BEING USED. THE CHASSIS CONTROL MODULE CAN BE SENSITIVE TO A VARIETY OF TRAILER WIRING ISSUES. THE TECHNICIAN WILL NEED TO MAKE A TRAILER TESTER USING ELECTRIC TRAILER BRAKE MAGNETS AND 7-WAY TRAILER CONNECTOR TO DETERMINE IF IT IS A VEHICLE OR TRAILER ISSUE. IF THE CONCERN IS NOT DUPLICATED WITH THE TESTER INSTALLED, THE VEHICLE IS OPERATING CORRECTLY AND THE FOCUS SHOULD BE ON THE TRAILER WIRING OR 7 WAY CONNECTOR.

TO BE REPLACED IF THE BRAKE PEDAL MOVES OR APPLIES ON ITS OWN AT A FULL TURN.

equipped with IOB Radio.

Noise from the Speakers Followed by a Reset of the Radio and Clock due to a software issue.

radio does not have a global positioning system location but OnStar is able to accurately locate the vehicle. Technician should check the installation of the COAX cables to be router correctly. Technician will gain access to the Radio or Human Machine Interface depending on the vehicle build. Install the EL-50334 test antenna to the Radio HMI and evaluate the operation. If the GPS signal is restored, inspect for incorrect coax routing as described above and if found, reroute the cable so it does not bypass the splitter.

SiriusXM Channels Due to Interference in Some Geographic Locations.

being: - Yellow - Blurry -Distorted - Image scrolling - Image with NO gridlines - Screen is blue with gridlines - Screen is blue with Service Rear Vision System message

amplifier part numbers until all the new amplifier numbers are setup correctly for programming.

function properly when diagnosing infotainment complaints, which may lead to mis-diagnosis.

for the USB, to make sure and enter the VIN# to ensure the correct part is being ordered.

Apple Carplay.

the hood fluttering, vibrating or displaying visible motion at highway speeds or over rough road surfaces.

make sure to select in the "active info pages" menu.

Inspect the body ground strap to insure it is connected in the proper locations and the strap eyelets are tight and do not rotate.

the hood fluttering, vibrating or displaying visible motion at highway speeds or over rough road surfaces.

Option Codes A52, AZ3, or B3F may comment about low treble, or excessive bass from the front door speakers. This is a normal design characteristic for this seat configuration. These vehicles lack a subwoofer.

Pressing the white Onstar push to talk button and say hide Onstar menu will hide the menu and saying unhide menu will make the menu come back again.

INOPERATIVE FOR CALLING BLUETOOTH PHONE CONTACTS. TECHNICIAN WILL NEED TO CLEAR ALL PRIVATE DATA AND REPAIR ANY PHONES THAT WERE DELETED.

TECHNICIAN WILL NEED TO REPLACE THE RADIO TO ADDRESS THE CONCERN.

STATIC NOISE CAUSED BY INTERNAL SOFTWARE.

CLUSTER AFTER AN ANDROID AUTO UPDATE. DEALER WILL NEED TO CONTACT GM TECHNICAL ASSISTANCE CENTER TECHLINE CUSTOMER SUPPORT AT 1-800-828-6860 FOR ADDITIONAL INSTRUMENT PANEL CLUSTER USB PROGRAMMING ASSISTANCE.

CUSTOMER'S POSSIBLE CONCERNS ARE: REMOTE KEYLESS ENTRY INOPERATIVE, PASSIVE ENTRY AND START INOPERATIVE, NO FOB DETECT MESSAGE ON DRIVERS INFORMATION CENTER, SERVICE TIRE PRESSURE SYSTEM, NO AUDIO, TOUCH SCREEN INOPERATIVE, OR RADIO AND/OR DRIVERS INFORMATION CENTER DISPLAY BLANK INOPERATIVE.

PHONE WILL NOT CONNECT TO ANDROID AUTO.

THE CONCERN IS THE RADIO MAY BE UNABLE TO SAVE XM FAVORITE STATIONS.

THE TECHNICIAN IS TO CONTACT THE GM TECHNICAL ASSISTANCE CENTER TO REVIEW A CONCERN WHEN THE VEHICLE'S RADIO IS UNABLE TO SAVE A XM PRESET AFTER SAVING PRESETS.

THE CUSTOMER IS UNABLE TO SELECT RADIO PRESETS FROM THE USB OR SD CARD AS THEY ARE GREYED OUT.

THE CONCERN AND OBTAIN A CASE NUMBER WHEN A CUSTOMER MAY COMMENT THAT THEY WILL HAVE THE RADIO SHUT OFF, AND WHEN RESTARTING THE VEHICLE THE RADIO WILL TURN ON UNWANTED.

CUSTOMERS MAY COMMENT THAT THEY WILL HAVE THE RADIO SHUT OFF, AND WHEN RESTARTING THE VEHICLE THE RADIO WILL TURN ON UNWANTED.

THE VEHICLE'S XM RADIO ONLY HAS XM PREVEIW CHANNELS.

VEHICLES SHIPPED OVER LONG DISTANCES OUTSIDE THE U.S. AND CANADA.

COMPONENTS ON THE VEHICLES TO ENSURE THAT THE CORRECT COMPONENT IS ORDERED OR REPLACED AND THE CORRECT LABOR CODE IS USED FOR WARRANTY SUBMISSION.

Vehicles.

repairs requiring balance and Road Force measurement.

Mounted/Preventing Vibration from Wheel Slip (Tire Sliding on Wheel).

repairs requiring balance and Road Force measurement.

Mounted/Preventing Vibration from Wheel Slip (Tire Sliding on Wheel).

ride characteristics of GM cars and trucks.

when installing the accessory Accessory 22" Wheels Regular Production Option Code (SES, SEU, SEY, OR SEZ) or production 22" wheels Regular Production Option Code (RPT or SMI) also during any service requiring wheel removal.

when installing the accessory Accessory 22" Wheels Regular Production Option Code (SES, SEU, SEY, OR SEZ) or production 22" wheels Regular Production Option Code (RPT or SMI) also during any service requiring wheel removal.

balancing them to prevent conditions like Vibration Shortly After Tires are Mounted/Preventing Vibration from Wheel Slip (Tire Sliding on Wheel)

VARIOUS NOISES ASSOCIATED WITH FOUR WHEEL DRIVE OPERATION. BEFORE BEGINNING ANY DIAGNOSIS IT IS IMPERATIVE TO REVIEW THE SYMPTOMS - TRANSFER CASE IN SERVICE INFORMATION AND PERFORM THE NECESSARY INSPECTIONS. IN ALL CASES THE COMPLAINT VEHICLE SHOULD BE COMPARED TO ANOTHER LIKE VEHICLE BEFORE BEGINNING ANY REPAIRS.

CAUSED BY THE WHEEL AND TIRE, AXLE COMPONENTS AND/OR PROPELLER SHAFTS.

EQUIPMENT.

INSTRUCTIONS FOR INSTALLING A FIFTH WHEEL OR GOOSENECK.

along with several low speed lan DTCs.

Schedules.

Accessories.

Park at start up after cold soak. This condition may be accompanied by a clunk noise. This is a slight movement that is more often seen visually, rather than felt, when viewed from the outside and using the auto-start feature, if equipped.

Fog/Driving Lamp Damage.

Accessories.

Park at start up after cold soak. This condition may be accompanied by a clunk noise. This is a slight movement that is more often seen visually, rather than felt, when viewed from the outside and using the auto-start feature, if equipped.

Tires and PDI installed Limited Production Option (LPO) Tires.

Warranty Coverage Period.

Park at start up after cold soak. This condition may be accompanied by a clunk noise. This is a slight movement that is more often seen visually, rather than felt, when viewed from the outside and using the auto-start feature, if equipped.

off.

This is a visual condition that will not affect durability, reliability or performance of the tires. Dealer should communicate to the customer that slight sidewall indentations are a common characteristic of radial tire construction.

to be inaccurate relative to a known distance traveled. Technician should obtain a hand-held GPS unit to test the odometer. If a hand held GPS unit is not available, the only other option is to verify the miles traveled using a surveyor's wheel or a dynamometer.

Shake or Shudder on Light Throttle Acceleration or Steady State Cruise

THAT WERE NOT SHIPPED WITH THE FEATURE NOT ENABLED.

originating from the front of the vehicle that is more predominant during turns or traveling over bumps. This may be caused by a damaged stabilizer shaft frame bracket. There have been some cases in which the bracket is cracked, as shown. This condition has been found to be the result of insufficient welds between the bracket and frame rail. There have been some cases on older vehicles of corrosion affecting the bracket

click, pop, and or crack type noise from the front suspension or front frame area while making tight turns. Technician will need to loosen and then re-torque the four front frame cross member nuts and bolts.

noise from the metals making contact.

noise from the metals making contact.

repair vehicles with a rattle, squeak, clunk, thump, or bump. If published Service Information diagnostics do not lead to a repair for the concern. Technician should inspect the opposite side shock/strut for the cause of the concern.

vehicles with various handling, vehicle dynamics concerns, noises from the suspension or underbody, or issues related to damaged suspension components. Before any in-depth diagnostics are performed, be aware that various issues could occur if the vehicle has been modified and inform the customer the conditions noted may not be covered under warranty. Technician will inspect for installed aftermarket suspension components. Also inspect for improperly adjusted torsion bars.

click, pop, and or crack type noise from the front suspension or front frame area while making tight turns. Technician will need to loosen and then re-torque the four front frame cross member nuts and bolts.

LIFT AND LOWER TAILGATE OPENS TOO QUICKLY. TECHNICIAN WILL ENSURE NOTHING WAS ADDED TO THE TAILGATE. IF THE TAILGATE OPENS WITHIN APPROXIMATELY 2-6 SECONDS, NO REPAIRS SHOULD BE MADE. TECHNICIAN SHOULD INSPECT THE RIGHT TAILGATE BUSHING IF THE TAILGATE OPENS TOO QUICKLY.

VEHICLES WITH VARIOUS HANDLING, VEHICLE DYNAMICS CONCERNS, NOISES FROM THE SUSPENSION OR UNDERBODY, OR ISSUES RELATED TO DAMAGED SUSPENSION COMPONENTS. BEFORE ANY IN-DEPTH DIAGNOSTICS ARE PERFORMED, BE AWARE THAT VARIOUS ISSUES COULD OCCUR IF THE VEHICLE HAS BEEN MODIFIED AND INFORM THE CUSTOMER THE CONDITIONS NOTED MAY NOT BE COVERED UNDER WARRANTY. TECHNICIAN WILL INSPECT FOR INSTALLED AFTERMARKET SUSPENSION COMPONENTS. ALSO INSPECT FOR IMPROPERLY ADJUSTED TORSION BARS.

weather climates and testing those batteries.

Center when the interior of the vehicle is hot from a sun load or extended heater operation. The Driver Information Center is designed to dim with high temperature exposure. This is done to protect the Driver Information Center from damage.

Center when the interior of the vehicle is hot from a sun load or extended heater operation. The Driver Information Center is designed to dim with high temperature exposure. This is done to protect the Driver Information Center from damage.

customers concern.

cold weather climates and testing those batteries.

HEATER-VENT-AIR CONDITIONING AIR FLOW FROM THE PASSENGER SIDE FAR RIGHT DASH VENT WHEN COMPARED TO THE OTHER DASH VENTS. TECHNICIAN WILL NEED TO REMOVE THE HEATER-VENT-AIR CONDITIONING AIR DISTRIBUTOR DUCT. TECHNICIAN CAN NOW CUT OUT THE PORTION OF THE DEFLECTOR TO INCREASE AIR FLOW.

HEATER-VENT-AIR CONDITIONING AIR FLOW FROM THE PASSENGER SIDE FAR RIGHT DASH VENT WHEN COMPARED TO THE OTHER DASH VENTS. TECHNICIAN WILL NEED TO REMOVE THE HEATER-VENT-AIR CONDITIONING AIR DISTRIBUTOR DUCT. TECHNICIAN CAN NOW CUT OUT THE PORTION OF THE DEFLECTOR TO INCREASE AIR FLOW.

CENTER WHEN THE INTERIOR OF THE VEHICLE IS HOT FROM A SUN LOAD OR EXTENDED HEATER OPERATION. THE DRIVER INFORMATION CENTER IS DESIGNED TO DIM WITH HIGH TEMPERATURE EXPOSURE. THIS IS DONE TO PROTECT THE DRIVER INFORMATION CENTER FROM DAMAGE.

functionality of Lane Keep Assist.Starting with2016 model year Lane Keep Assist Regular Production Option Code (UHX) replaced Lane Departure Warning Regular Production Option Code (UFL). Lane Keep Assist is designed to assist the driver in keeping the vehicle from drifting out of a driving lane that has clearly identified markings. The electric power steering provides a gentle steering correction if a lane marking has been crossed and the driver has not actively responded.

functionality of Lane Keep Assist.Starting with2016 model year Lane Keep Assist Regular Production Option Code (UHX) replaced Lane Departure Warning Regular Production Option Code (UFL). Lane Keep Assist is designed to assist the driver in keeping the vehicle from drifting out of a driving lane that has clearly identified markings. The electric power steering provides a gentle steering correction if a lane marking has been crossed and the driver has not actively responded.

functionality of Lane Keep Assist.Starting with2016 model year Lane Keep Assist Regular Production Option Code (UHX) replaced Lane Departure Warning Regular Production Option Code (UFL). Lane Keep Assist is designed to assist the driver in keeping the vehicle from drifting out of a driving lane that has clearly identified markings. The electric power steering provides a gentle steering correction if a lane marking has been crossed and the driver has not actively responded.

experience a steering hose leak.

functionality of Lane Keep Assist.Starting with2016 model year Lane Keep Assist Regular Production Option Code (UHX) replaced Lane Departure Warning Regular Production Option Code (UFL). Lane Keep Assist is designed to assist the driver in keeping the vehicle from drifting out of a driving lane that has clearly identified markings. The electric power steering provides a gentle steering correction if a lane marking has been crossed and the driver has not actively responded.

or fluid leak concern that is caused during extremely low temperatures.

or fluid leak concern that is caused during extremely low temperatures.

reservoir.

considered a fluid leak, and what is considered fluid seepage.

considered a fluid leak, and what is considered fluid seepage.

Technician will need to press the OnStar button and verify they have an active account and that the call connects with data and location.

electronic products through GM authorized Electronic Service Centers (ESCs) (U.S. and Canada).

electronic products through GM authorized Electronic Service Centers (ESCs) (U.S. and Canada).

TO CORRECT THE CONDITION OF THE REAR ENTERTAINMENT PLAYER FREEZES ON START UP MENU DUE TO A CALIBRATION CONCERN.

when entering the vehicle, it may cause the seat belt pretensioner to bend sharply over the seat side shield. If this continues to occur over an extended period of time, which is very rare, the seat belt pretensioner cable may fatigue and eventually separate, which could reduce the effectiveness of the vehicle?s seat belts. Before any damage occurs to the pretensioner cable itself, signs of wear will be visible on the pretensioner cable cover where it has been repeatedly bent over the seat side shield. Dealers are to replace the pretensioner and side shield for all customers that experience a broken pretensioner cable or come to a dealership with excessive wear on the cable sleeve. The repairs will be made at no charge to the customer.

may not have had the adjuster stops transferred and are missing on the replacement part. The front passenger seat may be in a position beyond the occupant design travel range.Dealers are to inspect the front passenger seat tracks for the presence of both adjuster stops and install missing adjuster stops if necessary.

REGARDING THE SEAT BELT WEBBING OR LATCH PLATE COMING TWISTED.

SEATED TO CORRECT A CUSTOMER CONCERN OF AN AIRBAG WARNING LAMP ILLUMINATED, OR ONE, OR MORE, AIRBAG DTC(S) SET.

vehicles apply within the settings.