2015 Gmc Sierra 3500 TSBs

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.

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

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

GDS 2.

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.

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.

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.

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.

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.

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.

GDS 2.

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).

may have no Reverse and no 2nd gear.

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.

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.

GDS 2.

Identification.

consumption.

service or aftermarket calibrations.

internal engine damage.

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

Recommendations.

and improve fuel economy.

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

Dealers Only).

Dealers Only).

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

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).

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.

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.

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

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.

Engine Coolant Leaks into Combustion Chamber

2014-2015 model year Chevrolet Cruze vehicles that are equipped with a diesel engine (RPO LML/LGH/LUZ), a malfunction-indicator light (MIL) may illuminate due to an offset in the temperature sensor in the diesel-emission-reduction fluid (DEF) tank reservoir or increased DEF tank-heater resistance. Special Coverage Adjustment This special coverage covers the condition described above for a period of 10 years or 120,000 miles (193,000 km), whichever occurs first, from the date the vehicle was originally placed in service, regardless of ownership. For vehicles covered by Vehicle Service Contracts, all eligible claims with repair orders on or after November 17, 2016, are covered by this special coverage and must be submitted using the labor operation codes provided with this bulletin. Claims with repair orders prior to November 17, 2016, must be submitted to the Service Contract provider. Correction Dealers are to replace the DEF tank reservoir. The repairs will be made at no charge to the customer

GM does not endorse any repairs that involve welding, bending, straightening o re-machining. Only cosmetic refinishing of the wheel's coatings, using recommended procedures, is allowed. Evaluating Damage In evaluating damage, it is the GM Dealer's responsibility to inspect the wheel for corrosion, scrapes, gouges, etc. The Dealer must insure that such damage is not deeper than what can be sanded or polished off. The wheel must be inspected for cracks. If cracks are found, discard the wheel. Any wheels with bent rim flanges must not be repaired or refinished. Wheels that have been refinished by an outside company must be returned to the same vehicle. The Dealer must record the wheel ID stamp or the cast date on the wheel in order to assure this requirement. Refer to Refinisher's Responsibility Outside Company later in this bulletin.

GM does not endorse any repairs that involve welding, bending, straightening o re-machining. Only cosmetic refinishing of the wheel's coatings, using recommended procedures, is allowed. Evaluating Damage In evaluating damage, it is the GM Dealer's responsibility to inspect the wheel for corrosion, scrapes, gouges, etc. The Dealer must insure that such damage is not deeper than what can be sanded or polished off. The wheel must be inspected for cracks. If cracks are found, discard the wheel. Any wheels with bent rim flanges must not be repaired or refinished. Wheels that have been refinished by an outside company must be returned to the same vehicle. The Dealer must record the wheel ID stamp or the cast date on the wheel in order to assure this requirement. Refer to Refinisher's Responsibility Outside Company later in this bulletin.

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.

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.

Dealers Only).

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.

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.

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

No Reverse While Driving condition. If this condition is encountered, refer to SI for further diagnosis.

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.

replaced and is still within warranty.

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.

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.

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.

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.

General Motors has decided to conduct a Voluntary Emission Recall on certain vehicles equipped with a 6.6L diesel (LML) engine and dual fuel tanks (N2N). Under certain driving conditions, fuel may not be transferred from the rear fuel tank to the front fuel tank at a sufficient rate. If this occurs, the diagnostic trouble code (DTC) P2636 will set, the malfunction indicator lamp will illuminate, the fuel gauge will display empty, and the transfer pump will be disabled until serviced. If the vehicle continues to be driven, it will run out of fuel in the front tank and stall. Dealers are to replace fuel line connections to allow the rear tank, in addition to the front tank, to directly supply fuel to the engine. The engine control module (ECM) will also be reprogrammed with calibrations necessary to support this new connection.

engines using Tech 2 or GDS 2 (U.S. and Canada).

Instrument Panel Cluster, and Heater-Vent-Air Conditioning display going blank also the Bluetooth connection drops when operating the snow plow. Dealer should communicate to the customer engineering is aware of this concern and working on this issue.

Soon Malfunction Indicator Lamp on and a misfire or a tick noise. Technician may find a Diagnostic Trouble Code P0300 set. If Service Information diagnosis does not isolate the cause of this concern inspect the valve operation. If the valve or valves are not moving the replace the Active Fuel Management lifters and guide on the bank with the concern and the Valve Lifter Oil Assembly.

intermittent crank / no start concern. Technician may find a Diagnostic Trouble Code in the Engine Control Module P1682. Technician will need to follow published Service Information diagnostics for the Diagnostic Trouble Code. If Service Information diagnostics lead to a root cause of the concern technician should replace the Engine Controls Ignition Relay # 70 with part number 13595908.

Technician should not replace the Instrument Panel Cluster for this concern. Technician should test the battery on the vehicle before performing any diagnostics. Low voltage can be caused by a number of reasons discharged battery, battery cable connections, infrequent usage, extended storage, short trip driving, extended key on accessory usage with the engine off, charging issues, and aftermarket electrical accessories.

12662034 part restriction through General Motors Product Quality Center has ended. Dealer can order the parts through the regular Customer Care and Aftersales parts process.

4WD message on the Driver Information Center when operated below 10 degrees Fahrenheit (-12 Celsius). Technician may find C0398 or C0326 stored in the Transfer Case Control Module. For vehicles with Regular Production Option Code NQH and NQ6 and only setting Diagnostic Trouble Codes C0398 or C0398 and C0326 the replacement of the actuator motor will correct the concern. Dealer will need to contact General Motors Product Quality Center for further assistance. For vehicles with Regular Production Option Code NQH and NQ6 with other transfer case Diagnostic Trouble Codes. If the vehicle had a Diagnostic Trouble Code C0398 in the transfer case control module stored with any other codes such as C0392, C0396, C0306 or other codes related to rotational position sensor or actuator position sensor it is likely that is causing a C0398 to set and replacement of the actuator will likely not repair the vehicle. For vehicles with Regular Production Option Code NP0 and only have a Diagnostic Trouble Code C0398 stored in the transfer case control module, the technician should insure the transfer case control module calibrations are up-to-date in Tis2Web.

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.

system that has progression tones when pressing the blue or red button. Technician will need to call General Motors Technical Assistance Center with the scan tool data from the OnStar system.

On 1500 series trucks and all sport utility vehicle with regular production option code IO3 radio the ambient air temperature sensor is hard wired to the engine control module and then the signal goes on high speed local area network to the body control module from there on low speed local area network to the radio. On 1500 series trucks and all sport utility vehicle with regular production option code IO4, IO5, or IO6 the ambient air temperature sensor is hard wired to the engine control module and then the signal goes on high speed local area network to the body control module from there on low speed local area network to the radio then Most 50 Bus to the Human Machine Interface. On 2500/3500 series trucks production option code IO3 radio the ambient air temperature sensor is hard wired to the instrument panel cluster and then the signal goes on low speed local area network to the radio. On 2500/3500 series trucks production option code IO4, IO5, or IO6 radio the ambient air temperature sensor is hard wired to the instrument panel cluster and then the signal goes on low speed local area network to the radio then Most 50 Bus to the Human Machine Interface.

inoperative and Navigation/GPS/Compass issues. Technician may find Diagnostic Trouble Codes B101D sym 3C and or F0. Technician will gather data using a scan tool and contact General Motors Technical Assistance Center for further assistance. After approval technician will replace the OnStar module.

vehicles with a Malfunction Indicator Lamp on. Technician may find Diagnostic Trouble Code P16F3. If the Diagnostic Trouble Code is set in the Transmission Control Module technician will need to contact General Motors Technical Assistance Center for further assistance.

4WD message on the Driver Information Center when operated below 10 degrees Fahrenheit (-12 Celsius). Technician may find C0398 or C0326 stored in the Transfer Case Control Module. For vehicles with Regular Production Option Code NQH and NQ6 and only setting Diagnostic Trouble Codes C0398 or C0398 and C0326 the replacement of the actuator motor will correct the concern. Dealer will need to contact General Motors Product Quality Center for further assistance. For vehicles with Regular Production Option Code NQH and NQ6 with other transfer case Diagnostic Trouble Codes. If the vehicle had a Diagnostic Trouble Code C0398 in the transfer case control module stored with any other codes such as C0392, C0396, C0306 or other codes related to rotational position sensor or actuator position sensor it is likely that is causing a C0398 to set and replacement of the actuator will likely not repair the vehicle. For vehicles with Regular Production Option Code NP0 and only have a Diagnostic Trouble Code C0398 stored in the transfer case control module, the technician should insure the transfer case control module calibrations are up-to-date in Tis2Web.

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.

poor performance on recent built vehicles.

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

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

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

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

require the PQC to be notified.

the customer concern for reduced engine power and /or MIL illuminated.

noise during a cold star and a warm engine operation.

party which could increase the risk of vehicle theft. Dealers are to replace all applicable keys and lock cylinders with new key configurations.

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.

and/or DTCs P0068, P0121, P1516, P2101, P2119, and/or P2176 that may be experienced on high mileage vehicles. Please discard PIP4578.

Certain 2015 model year Chevrolet Silverado HD and GMC Sierra HD model vehicles equipped with the Duramax Diesel 6.6L Engine (RPO LML) may exhibit engine harness chafing on the EGR stud. Dealers are to inspect the harness for damage, reroute the harness, and install a clip onto the EGR stud.

Certain 2016 model year Cadillac Escalade, Escalade ESV, Chevrolet Corvette, GMC Yukon Denali and 2015 Cadillac Escalade ESV, Chevrolet Silverado LD, GMC Sierra LD, and Yukon Denali XL model vehicles equipped with 6.2L engines (RPO L86 and LT1) may have engines built with cylinder head gaskets in which the head gasket stopper ring was off location. The gasket may fatigue over time leading to the possibility of a leak into the combustion chamber after several thousand miles. Possible symptoms include: a check engine light for P0300 Misfire, possible combustion gas leaks to coolant resulting in overheating, over-flowed coolant bottle, milky-colored engine oil in the crankcase, piston scuffing and if the vehicle is continued to be driven in this condition, engine failure. Dealers are to replace the left and right side engine head gasket.

This bulletin provides a service procedure to install the original design temperature-sensor wiring harness to the valve body on certain 2015 model year Cadillac Escalade and Escalade ESV; Chevrolet Silverado; and GMC Sierra, Yukon, and Yukon XL vehicles, equipped with a 6.2L engine (L86) and 8-speed automatic transmission (M5U). The supplier of the transmission-wiring harness introduced an unapproved change to the temperature sensor (thermistor), resulting in incorrect oil-temperature readings during transition from cold to warm temperatures. This could cause a harsh shift when starting the vehicle at temperatures below 32F (0C); however, shift quality improves once the transmission oil warms up.

engine oil consumption.

transmission/transaxle identification.

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.

Certain vehicles that are equipped with a diesel engine (RPO LML/LGH/LUZ), a malfunction-indicator light (MIL) may illuminate due to an offset in the temperature sensor in the diesel-emission-reduction fluid (DEF) tank reservoir or increased DEF tank-heater resistance. Dealers are to replace the DEF tank reservoir. The repairs will be made at no charge to the customer.

signals or brakes are used, engineering is aware of the condition and are working on a resolution.

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.

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

trucks, light duty trucks, and heavy duty trucks with premature catalytic converter failures. It is recommended to inspect for a poor crimp on the grounds ring terminal at the engine block for the bank with the concern and repair the wire.

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.

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.

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.

Technician can check Service Information for some accessories. Technician can also contact Partect for assistance. Technician can also contact Techline Customer Support Center for programming issues.

system that has progression tones when pressing the blue or red button. Technician will need to call General Motors Technical Assistance Center with the scan tool data from the OnStar system.

cylinder bore damage, scoring or out of round as the possible cause of engine oil consumption, misfire, cylinder leakage or blow by. Technician will need to inspect the engine for Cylinder damage or scoring, An out of round cylinder bore, Dirt intrusion, and Catalytic Converter failure.

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.

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.

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.

ON 1500 SERIES TRUCKS AND ALL SPORT UTILITY VEHICLE WITH REGULAR PRODUCTION OPTION CODE IO3 RADIO THE AMBIENT AIR TEMPERATURE SENSOR IS HARD WIRED TO THE ENGINE CONTROL MODULE AND THEN THE SIGNAL GOES ON HIGH SPEED LOCAL AREA NETWORK TO THE BODY CONTROL MODULE FROM THERE ON LOW SPEED LOCAL AREA NETWORK TO THE RADIO. ON 1500 SERIES TRUCKS AND ALL SPORT UTILITY VEHICLE WITH REGULAR PRODUCTION OPTION CODE IO4, IO5, OR IO6 THE AMBIENT AIR TEMPERATURE SENSOR IS HARD WIRED TO THE ENGINE CONTROL MODULE AND THEN THE SIGNAL GOES ON HIGH SPEED LOCAL AREA NETWORK TO THE BODY CONTROL MODULE FROM THERE ON LOW SPEED LOCAL AREA NETWORK TO THE RADIO THEN MOST 50 BUS TO THE HUMAN MACHINE INTERFACE. ON 2500/3500 SERIES TRUCKS PRODUCTION OPTION CODE IO3 RADIO THE AMBIENT AIR TEMPERATURE SENSOR IS HARD WIRED TO THE INSTRUMENT PANEL CLUSTER AND THEN THE SIGNAL GOES ON LOW SPEED LOCAL AREA NETWORK TO THE RADIO. ON 2500/3500 SERIES TRUCKS PRODUCTION OPTION CODE IO4, IO5, OR IO6 RADIO THE AMBIENT AIR TEMPERATURE SENSOR IS HARD WIRED TO THE INSTRUMENT PANEL CLUSTER AND THEN THE SIGNAL GOES ON LOW SPEED LOCAL AREA NETWORK TO THE RADIO THEN MOST 50 BUS TO THE HUMAN MACHINE INTERFACE.

ON 1500 SERIES TRUCKS AND ALL SPORT UTILITY VEHICLE WITH REGULAR PRODUCTION OPTION CODE IO3 RADIO THE AMBIENT AIR TEMPERATURE SENSOR IS HARD WIRED TO THE ENGINE CONTROL MODULE AND THEN THE SIGNAL GOES ON HIGH SPEED LOCAL AREA NETWORK TO THE BODY CONTROL MODULE FROM THERE ON LOW SPEED LOCAL AREA NETWORK TO THE RADIO. ON 1500 SERIES TRUCKS AND ALL SPORT UTILITY VEHICLE WITH REGULAR PRODUCTION OPTION CODE IO4, IO5, OR IO6 THE AMBIENT AIR TEMPERATURE SENSOR IS HARD WIRED TO THE ENGINE CONTROL MODULE AND THEN THE SIGNAL GOES ON HIGH SPEED LOCAL AREA NETWORK TO THE BODY CONTROL MODULE FROM THERE ON LOW SPEED LOCAL AREA NETWORK TO THE RADIO THEN MOST 50 BUS TO THE HUMAN MACHINE INTERFACE. ON 2500/3500 SERIES TRUCKS PRODUCTION OPTION CODE IO3 RADIO THE AMBIENT AIR TEMPERATURE SENSOR IS HARD WIRED TO THE INSTRUMENT PANEL CLUSTER AND THEN THE SIGNAL GOES ON LOW SPEED LOCAL AREA NETWORK TO THE RADIO. ON 2500/3500 SERIES TRUCKS PRODUCTION OPTION CODE IO4, IO5, OR IO6 RADIO THE AMBIENT AIR TEMPERATURE SENSOR IS HARD WIRED TO THE INSTRUMENT PANEL CLUSTER AND THEN THE SIGNAL GOES ON LOW SPEED LOCAL AREA NETWORK TO THE RADIO THEN MOST 50 BUS TO THE HUMAN MACHINE INTERFACE.

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.

ENGINE SOON WITH DIAGNOSTIC TROUBLE CODE P0300 AND AN ENGINE MISFIRE. TECHNICIAN WILL NEED TO INSPECT THE VALVE OPERATION, IF THE VALVE OR VALVES ARE NOT MOVING THE ACTIVE FUEL MANAGEMENT LIFTERS AND GUIDE ON THE BANK WITH THE CONCERN AND THE OIL PUMP AND OIL PAN ASSEMBLY SHOULD BE REPLACED.

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.

THIS BULLETIN PROVIDES A SERVICE PROCEDURE TO REPROGRAM THE ECM (ENGINE CONTROL MODULE) ON CERTAIN TRUCKS EQUIPPED WITH THE 6.6L DURAMAX DIESEL ENGINE (RPO LML). IF A BRAKING EVENT IS IMMEDIATELY FOLLOWED BY AN AGGRESSIVE ATTEMPT TO ACCELERATE ON SOME OF THESE VEHICLES, ESPECIALLY WHEN DRIVING WITH ONE FOOT ON THE BRAKE AND ONE FOOT ON THE THROTTLE, THE CUSTOMER MAY EXPERIENCE UP TO A 5 SECOND LAG IN ACCELERATION PERFORMANCE DUE TO THE ENHANCED ELECTRONIC PEDAL OVERRIDE BEING ACTIVATED (EEPO INTERVENTION) AND A SUBSEQUENT REDUCED POWER MODE. EEPO INTERVENTION IS NORMAL, BUT IN THIS VEHICLE, THE EEPO INTERVENTION MAY BE MORE FREQUENT THAN DESIRED DUE TO CERTAIN CALIBRATIONS. THE DEALER WILL REFLASH THE ENGINE CONTROL MODULE WITH A REVISED CALIBRATION AT THE NEXT SERVICE VISIT.

IMPCO AUTOMOTIVE IS CONDUCTING THIS EMISSION RECALL. FOR THE CONVENIENCE OF OUR CUSTOMERS, GENERAL MOTORS HAS AGREED TO ASSIST IN ADMINISTERING THIS RECALL THROUGH ITS CHEVROLET AND GMC DEALERS. IMPCO AUTOMOTIVE HAS DECIDED TO CONDUCT A VOLUNTARY EMISSION RECALL INVOLVING CERTAIN VEHICLES EQUIPPED WITH A COMPRESSED NATURAL GAS (CNG) SYSTEM. THESE VEHICLES WERE BUILT WITH AN INCORRECT ECM CALIBRATION. DEALERS ARE TO REPROGRAM THE ENGINE CONTROL MODULE (ECM). THE CHANGE WILL ALLOW THE VEHICLE TO OPERATE AS ORIGINALLY DESIGNED.

THIS BULLETIN PROVIDES A SERVICE PROCEDURE TO PERFORM A DRIVE AUDIT AND, IF NECESSARY, REPLACE THE REACTION/OUTPUT CARRIER ASSEMBLY AND ASSOCIATED PARTS ON CERTAIN 2015 MODEL YEAR CADILLAC ESCALADE, ESCALADE ESV; CHEVROLET SILVERADO LD CREW, SILVERADO LD CREW LTZ, SILVERADO LD EXT LTZ; AND GMC SIERRA LD CREW, SIERRA LD CREW DENALI, SIERRA LD EXT, YUKON, YUKON DENALI, YUKON XL, YUKON XL DENALI VEHICLES EQUIPPED WITH AN 8-SPEED TRANSMISSION (M5U) AND A 6.2L ENGINE (L86). SOME OF THESE VEHICLES MAY EXHIBIT A TRANSMISSION GEAR WHINE NOISE AT 1000-2000 RPM AND BETWEEN 20 MPH (32 KPH) AND 35 MPH (56 KPH)."

CERTAIN 2015 MODEL YEAR CADILLAC ESCALADE AND ESCALADE ESV; CHEVROLET SILVERADO LD CREW AND DOUBLE CAB; AND GMC SIERRA LD CREW, SIERRA LD CREW DOUBLE CAB, YUKON, AND YUKON XL MODEL VEHICLES THAT ARE EQUIPPED WITH A 6.2L ENGINE (RPO L86) AND 8-SPEED AUTOMATIC TRANSMISSION (RPO M5U) MAY HAVE A CONDITION IN WHICH THE U-JOINT RETAINER BOLTS LOSE INDEX. IF THIS CONDITION OCCURS, THE CUSTOMER MAY HEAR OR FEEL A CLUNKING NOISE WHEN CHANGING SPEED. IF THIS CONDITION IS NOT CORRECTED, REDUCED CLAMP LOAD MAY CAUSE THE PROPSHAFT TO MOVE RELATIVE TO THE AXLE YOKE AND THE CUSTOMER MAY FEEL A VIBRATION. IF ONE OR MORE BOLTS BACK OUT COMPLETELY, THE PROPSHAFT MAY SEPARATE FROM THE AXLE RESULTING IN A LOSS OF DRIVE AND POTENTIAL DAMAGE TO THE UNDERSIDE OF THE VEHICLE. DEALERS ARE TO REPLACE TWO U-JOINT RETAINERS AND FOUR U-JOINT RETAINER BOLTS WITH NEW BOLTS THAT INCLUDE AN ADHESIVE PATCH.

THIS BULLETIN PROVIDES A SERVICE PROCEDURE TO PERFORM A DRIVE AUDIT AND, IF NECESSARY, REPLACE THE REACTION/OUTPUT CARRIER ASSEMBLY AND ASSOCIATED PARTS ON CERTAIN 2015 MODEL YEAR CADILLAC ESCALADE, ESCALADE ESV; CHEVROLET SILVERADO LD CREW, SILVERADO LD CREW LTZ, SILVERADO LD EXT LTZ; AND GMC SIERRA LD CREW, SIERRA LD CREW DENALI, SIERRA LD EXT, YUKON, YUKON DENALI, YUKON XL, YUKON XL DENALI VEHICLES EQUIPPED WITH AN 8-SPEED TRANSMISSION (M5U) AND A 6.2L ENGINE (L86). SOME OF THESE VEHICLES MAY EXHIBIT A TRANSMISSION GEAR WHINE NOISE AT 1000-2000 RPM AND BETWEEN 20 MPH (32 KPH) AND 35 MPH (56 KPH).

THIS BULLETIN PROVIDES A SERVICE PROCEDURE TO INSTALL THE ORIGINAL DESIGN TEMPERATURE-SENSOR WIRING HARNESS TO THE VALVE BODY ON CERTAIN 2015 MODEL YEAR CADILLAC ESCALADE AND ESCALADE ESV; CHEVROLET SILVERADO; AND GMC SIERRA, YUKON, AND YUKON XL VEHICLES. THE SUPPLIER OF THE TRANSMISSION-WIRING HARNESS INTRODUCED AN UNAPPROVED CHANGE TO THE TEMPERATURE SENSOR (THERMISTOR), RESULTING IN INCORRECT OIL-TEMPERATURE READINGS DURING TRANSITION FROM COLD TO WARM TEMPERATURES. THIS COULD CAUSE A HARSH SHIFT WHEN STARTING THE VEHICLE AT TEMPERATURES BELOW 32F (0C); HOWEVER, SHIFT QUALITY IMPROVES ONCE THE TRANSMISSION OIL WARMS UP."

THIS BULLETIN PROVIDES A SERVICE PROCEDURE TO REPROGRAM AND UPDATE THE GLOW-PLUG CONTROL MODULE WITH NEW SOFTWARE ON CERTAIN 2015 MODEL YEAR CHEVROLET SILVERADO HD CREW, HD CREW LTZ, HD REGULAR, HD EXT, HD EXT LTZ VEHICLES EQUIPPED WITH A DURAMAX DIESEL ENGINE (RPO LML) AND CERTAIN 2015 MODEL YEAR GMC SIERRA HD CREW, HD CREW DENALI, HD REGULAR, HD EXT VEHICLES EQUIPPED WITH A DURAMAX DIESEL ENGINE (RPO LML). THE SOFTWARE UPDATE LIMITS THE INTAKE-AIR HEATER INPUT VOLTAGE TO 13.5V. WHEN THE SYSTEM VOLTAGE EXCEEDS 13.5V, THE HEATERS FIELD-EFFECT TRANSISTOR CAN GENERATE EXCESSIVE HEAT. THIS HEAT CAN CAUSE A SHORT CIRCUIT IN THE TRANSISTOR AND, IN RARE CASES, A FIRE IN THE VEHICLES ENGINE COMPARTMENT.

PROCEDURE FOUND IN THE SERVICE INFORMATION.

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

BATTERY DRAIN CONCERN IS BEING CAUSED BY A KNOWN CONCERN WITH BLUETOOTH CALL TRANSFER OPERATION WHEN EXITING THE VEHICLE. IF THE CONCERN IS DUPLICATED AT THE DEALER WITH THE ONSTAR LED IS STILL GREEN AFTER THE VEHICLE IS TURNED OFF AND THE BLUETOOTH CALL WAS DISCONNECTED. DEALER SHOULD ADVISES THAT ENGINEERING IS AWARE OF THE CONCERN AND IS CURRENTLY INVESTIGATING THE ISSUE.

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

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

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.

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

GASKET SEALING SURFACES.

AFTERMARKET CALIBRATIONS OR PERFORMANCE PARTS MAY BE THE CAUSE.

VEHICLES INVOLVED IN THIS SERVICE UPDATE WERE PLACED ON STOP DELIVERY FEBRUARY 3, 2014. ONCE THE SERVICE PROCEDURE CONTAINED IN THIS BULLETIN HAS BEEN PERFORMED ON THE VEHICLE, THE VEHICLE IS RELEASED FROM STOP DELIVERY AND CAN BE DELIVERED TO THE CUSTOMER. THIS BULLETIN PROVIDES A SERVICE PROCEDURE TO ENSURE THAT THE FUSE BLOCK, LOCATED ON TOP OF THE PASSENGER SIDE SHOCK TOWER IN THE ENGINE COMPARTMENT, IS PROPERLY RETAINED ON CERTAIN VEHICLES EQUIPPED WITH A 220 AMP GENERATOR (KW5). THE RETENTION CLIPS THAT ATTACH THE FUSE BLOCK TO THE BODY CAN BECOME LOOSE ALLOWING THE FUSE BLOCK TO MOVE OUT OF POSITION. IF THIS OCCURS, EXPOSED CONDUCTORS IN THE FUSE BLOCK MAY CONTACT THE MOUNTING STUDS CAUSING A SHORT TO GROUND EVENT AND POSSIBLY AN ENGINE COMPARTMENT FIRE.

TO BE ABNORMAL MAY NOT HAVE BEEN THERE WHEN THE VEHICLE WAS PURCHASED. TECHNICIAN SHOULD LOOK FOR NON - GENERAL MOTORS AFTERMARKET ACCESSORIES INSTALLED ON THE VEHICLE THAT CAN CAUSE THESE ISSUES.

VEHICLES EQUIPPED WITH THE DURAMAX DIESEL ENGINE OPTION AND THE AMBULANCE UPFITTER OR FIRE TRUCK UPFITTER OPTION MAY HAVE A CONDITION IN WHICH THE EMISSION CONTROL SYSTEM AS DESIGNED WILL LIMIT SPEED UNDER CERTAIN CONDITIONS. THE EPA HAS APPROVED GENERAL MOTORS REQUEST TO REMOVE THE EMISSION CONTROL SYSTEM SPEED LIMITATIONS ON THESE EMERGENCY VEHICLES WHERE APPLICABLE. DEALERS ARE TO REPROGRAM THE ENGINE CONTROL MODULE (ECM) WITH NEW CALIBRATION FOR EMERGENCY VEHICLES, WHICH WILL REMOVE THE EMISSION CONTROL SYSTEM SPEED LIMITATIONS, AND ALSO PROVIDE AN EARLIER WARNING FOR DIESEL PARTICULATE FILTER (DPF) REGENERATION.

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.

AND NEED TO REORDER REPLACEMENT PARTS USING SAME PART NUMBERS. *PE

DUE TO INTERNAL DAMAGE, EXTREME CAUTION MUST BE TAKEN FOR COMPONENT DEBRIS VIA BROKEN, BENT OR MISSING INTAKE VALVES. *PE

TO REPAIR THE CONDITION, ENGINEER MUST DETERMINE THE CAUSE OF CONDITION BEFORE REPAIR. MODEL 2015 SIERRA 2500/3500, SILVERADO 2500/3500. *PE UPDATED 1/22/16. *PE

SELECT DOCUMENT SEARCH BUTTON BELOW. ON CERTAIN TRUCKS AND VEHICLES, THE ONSTAR SYSTEM IS INOPERATIVE DUE TO EMBEDDED PHONE FLASH MEMORY CHIP AND VEHICLE COMMUNICATION INTERFACE MODULE (VCIM) NEEDS REPLACING. MODEL 2015. *PE

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.

and repair procedures.

Allegation Resolution (PAR) claim.

Allegation Resolution (PAR) claim.

working on a LIN bus.

offered through GM.

U**** Byte 71 DTC.

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

do not return.

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

Technical Assistance (TAC).

normal operations.

and repair procedures.

Only).

verification sheets (CCVS).

Technical Assistance (TAC).

causing the parking pawl to engage while driving.

and repair procedures.

Technical Assistance (TAC).

verification sheets (CCVS).

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

Customer Concern Verification Sheets (CCVS).

RemoteLink? phone application.

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.

appropriate Vibration Analysis-Road testing procedure, when diagnosing vibration concerns.

part numbers for the labels.

pixelated

to complete some repairs.

and how to correct and repair.

normal operations.

for vehicles that may need an upgrade.

and repair procedures.

may be un necessary.

customer request.

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

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

information to correct a customer concern of alleged no park, vehicle rolls in park or park will not hold.

manually, to fix the customers concern of the mirriors shaking or fluttering at normal driving speeds.

customer.

customer request.

diagnose them.

excessive movement and a click noise while driving.

Fob or OnStar Mobile Application and where to locate the information for future use.

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.

Technician will gain access to the roller rockers to inspect them. Only replace the roller rocker that is missing needle bearings. Be sure to clean the oil drains to retrieve the needle bearings. Each roller rocker has 66 bearings.

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

INOPERATIVE OR DISC WILL NOT EJECT.

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.

ON FEBRUARY 26, 2014, (27) VEHICLES WERE PLACED ON STOP DELIVERY VIA GLOBALCONNECT MESSAGE G-_0000186344. ON FEBRUARY 28, 2014 (GLOBALCONNECT MESSAGE G_0000186555), (25) OF THE VEHICLES WERE RELEASED FROM STOP DELIVERY WITH NO FURTHER ACTION REQUIRED; HOWEVER, THE 2 VEHICLES REMAINED ON STOP DELIVERY. THE 2 REMAINING VEHICLES LISTED BELOW ARE NOW REMOVED FROM STOP DELIVERY. NO FURTHER ACTION IS REQUIRED.

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.

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.

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).

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).

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

(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.

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.

Only).

programs.

information found in the service manual.

vehicles before sold (prepping) to the customer.

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.

services and maintenance on vehicles originating/sold in Canada.

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

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

services and maintenance on vehicles originating/sold in Canada.

diagnosing a front heated seat concern and is not meant to be a diagnostic flow chart or replace Service Information. Always, perform and refer to Service Information for the latest diagnostic information and procedures.

field action customer reimbursement procedure (U.S. Dealers Only).

to GM for payment.

diagnosing a front heated seat concern and is not meant to be a diagnostic flow chart or replace Service Information. Always, perform and refer to Service Information for the latest diagnostic information and procedures.

VEHICLES ORIGINATING/SOLD IN CANADA.

MAINTENANCE ON VEHICLES ORIGINATING/SOLD IN CANADA.

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.

warranty replacements.

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.

(U.S).

warranty replacements.

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.

warranty replacements.

warranty replacements.

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.

Procedure as Outlined Below)

Procedure as Outlined Below)

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.

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.

IPC reprogramming and setup using the service programming system (SPS). 2. Odometer setup at the electronic service center (ESC) when using an exchange IPC/DIC. 3. Tech 2 The Tech 2 is used to set up a replacement BCM, which includes loading the odometer value that is displayed and stored in the IPC. A replacement IPC will display the previously stored vehicle odometer value, communicated from the BCM, after cycling the ignition or driving the vehicle. *The odometer programming is integrated as part of the BCM programming procedure. It is not a stand-alone event.

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

temperatures of 15F (−9C) or less, customers may comment on an Exhaust Fluid Range message displaying on the DIC even though the DEF fluid has been filled. When the DEF is frozen, the level sensor cannot determine the fluid level in the tank. If this occurs the logic of the PCM will assume a default fluid level. The logic will use the calculated range based on DEF dosing history and the assumed fluid level. If there is a high learned dosing rate and the fluid has not thawed to where the pins of the level sensor can function, there is a possibility the Exhaust Fluid Range message can set with the range from approximately 1609 km (1000 mi) to less than 482 km (300 mi), even though the tank is known to have fluid or be full. This is an operating characteristic of the system. However to increase or eliminate the range message, once the range drops below 482 km (300 mi), the DEF tank should be refilled. This should allow refill detection to occur and turn off the range indicator. The operator must be sure not to overfill the DEF tank using the instructions provided in this bulletin or in the owners manual. When in frozen tank status, refill detections are not allowed until the warning strategy reaches the point at which the distance remaining is less than 482 km (300 mi). The refill detection is dependent on the DEF thawing enough that the level sensor pins can be read. A fully frozen tank can take almost an hour to detect a refill, after the vehicle is started. This condition should not be confused with the situation described in PIP4864: Low Or Speed Limited Diesel Exhaust Fluid Message (DEF) Will Not Reset.

keys, fobs, and key tags together on a single crimped loop or a cable. This practice may result in unintended key rotation, and should be discontinued immediately. The information in this bulletin details the proper configurations for the ignition key, fob, key rings and key tags and applying a QR code sticker or barcode sticker to a key fob.

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

keys, fobs, and key tags together on a single crimped loop or a cable. This practice may result in unintended key rotation, and should be discontinued immediately. The information in this bulletin details the proper configurations for the ignition key, fob, key rings and key tags and applying a QR code sticker or barcode sticker to a key fob.

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.

applications.

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

reading on the volt gauge during the first several minutes after a cold start. Dealer should communicate to the customer this condition is a normal operating characteristic of their vehicle.

On certain passenger cars and light duty trucks, equipped with Gen 10 OnStar, the embedded phone flash memory chip may become corrupted, causing the OnStar system to become inoperative. Dealers are to replace and program the vehicle communication interface module (VCIM).

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.

using a second stage manufacturer

conductive finish.

the TIS Service Programming System (SPS), set-up and warranty.

turned on after turning the ignition off and opening the driver?s door. The radio can then be turned back on after the vehicle's Retained Accessory Power has been canceled by simply pressing the power button on the radio. This is a normal characteristic of the key off operation.

be re-learned when accessory wheels are installed on the vehicle.

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.

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.

reprogram modules.

it is warranty or not.

cause if diagnostics finds no problems to that point.

power mirriors, shorts in the wiring and the MSM, and reprogram the module if shorts weren't found, for the customers concern of the mirriors and/or seat inoperative.

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.

concern of the blank screen after start up, Rear view camera on, touch screen inop, bluetooth and navigation concerns.

concern of the blank screen after start up, Rear view camera on, touch screen inop, bluetooth and navigation concerns.

required.

inop.

additional information.

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.

certain channels but XM channel info is displayed. Technician will need to contact XM and deactivate and activate the module.

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.

TO PERFORM AN INSTANT UPDATE OF THE AMBIENT TEMPERATURE SENSOR, PRESS AND HOLD THE RECIRC BUTTON AND AIR CONDITIONING BUTTON ON THE HEATER-VENT-AIR CONDITIONING CONTROL HEAD SIMULTANEOUSLY. IT IS ALSO POSSIBLE TO PERFORM THIS BY USING A SCAN TOOL IN SPECIAL FUNCTION MODE AND SELECT INSTANT UPDATE.

THIS BULLETIN PROVIDES A SERVICE PROCEDURE TO REPROGRAM THE INSTRUMENT PANEL CLUSTER ON CERTAIN VEHICLES. THESE VEHICLES MAY HAVE AN ODOMETER READING AT PEEK IN (I.E. DRIVER INFORMATION CENTER (DIC) SCREEN WHEN THE VEHICLE IS IN THE OFF POWER MODE BUT THE CLUSTER IS AWAKENED BY OPENING THE CAR DOOR OR USING THE KEY FOB) DOES NOT MATCH THE SEASON ODOMETER READING WHEN THE VEHICLE IS IN THE RUN POWER MODE. THE TRIP A/B AND FUEL ECONOMY DISPLAYS MAY ALSO BE INCORRECT. THIS CONDITION OCCURS, WHEN THE VEHICLE SITS FOR AN EXTENDED PERIOD OF TIME AND, NORMAL PARASITIC CURRENT DRAWS DEPLETE THE BATTERY STATE OF CHARGE TO LESS THAN 12 VOLTS AND, THE VEHICLE IS IN THE OFF POWER MODE WHEN THE CLUSTER IS AWAKENED AS DESCRIBED ABOVE.

THIS BULLETIN PROVIDES A SERVICE PROCEDURE TO REPROGRAM THE INSTRUMENT PANEL CLUSTER ON CERTAIN VEHICLES. THESE VEHICLES MAY HAVE AN ODOMETER READING AT PEEK IN (I.E. DRIVER INFORMATION CENTER (DIC) SCREEN WHEN THE VEHICLE IS IN THE OFF POWER MODE BUT THE CLUSTER IS AWAKENED BY OPENING THE CAR DOOR OR USING THE KEY FOB) DOES NOT MATCH THE SEASON ODOMETER READING WHEN THE VEHICLE IS IN THE RUN POWER MODE. THE TRIP A/B AND FUEL ECONOMY DISPLAYS MAY ALSO BE INCORRECT. THIS CONDITION OCCURS, WHEN THE VEHICLE SITS FOR AN EXTENDED PERIOD OF TIME AND, NORMAL PARASITIC CURRENT DRAWS DEPLETE THE BATTERY STATE OF CHARGE TO LESS THAN 12 VOLTS AND, THE VEHICLE IS IN THE OFF POWER MODE WHEN THE CLUSTER IS AWAKENED AS DESCRIBED ABOVE.

THIS BULLETIN PROVIDES A SERVICE PROCEDURE TO RELOCATE THE SEPARATE 250 AMP FUSE INTO THE PRE-FUSE ASSEMBLY ON TOP OF THE VEHICLE BATTERY ON CERTAIN VEHICLES EQUIPPED WITH A 220 AMP GENERATOR (RPO KW5). THESE VEHICLES MAY, DUE TO CORROSION AT THE ENDS OF THE FUSE, EXPERIENCE A RESISTANCE BUILD-UP THAT DOES NOT ALLOW CURRENT TO FLOW THROUGH THE FUSE, RESULTING IN THE GENERATOR NOT BEING ABLE TO CHARGE THE VEHICLE BATTERY. THE BATTERY SYMBOL MAY APPEAR ON THE IP AND A MESSAGE IN THE DRIVER INFORMATION CENTER WILL SHOW SERVICE BATTERY CHARGING SYSTEM. AS THE BATTERY LOSES CHARGE, THE VEHICLE MAY STALL OR NOT BE ABLE TO START WHEN THE BATTERY GOES BELOW 11.3 VOLTS. DEPENDING ON THE STATE OF CHARGE OF THE BATTERY WHEN THIS OCCURS, THE VEHICLE MAY HAVE BETWEEN 50-85 MINUTES BEFORE ANY POTENTIAL STALL CONDITION.

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.

DEAD BATTERY AFTER LEAVING THE VEHICLE DURING A BLUETOOTH CALL.

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

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.

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.

DEAD BATTERY AFTER LEAVING THE VEHICLE DURING A BLUETOOTH CALL.

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.

TESTER/CHARGER FOR DIAGNOSING BATTERY REPLACEMENTS AND MAINTAINING BATTERIES ON NEW VEHICLES IN DEALER INVENTORY.

CONTROL MODULES

MESSAGE TO BE DISPLAYED IN DRIVER INFORMATION CENTER (DIC). MODEL 2014 SILVERADO 1500, SIERRA 1500, 2015 SIERRA 2500/3500, YUKON, YUKON XL, SILVERADO 2500/3500, SUBURBAN, TAHOE. *PE

MODULE FOR CERTAIN TRUCKS THAT GENERATE EXCESSIVE HEAT, CAUSING A SHORT CIRCUIT IN TRANSISTOR AND/OR FIRE. MODEL 2015 SILVERADO & SIERRA HD CREW, DENALI, REGULAR EXT. *PE

an OnStar In-Vehicle Voice Message Is Heard.

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

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

reception is poor.

NAV screen audio content is unavailable via speech recognition, display screen is stuck on incoming call view after phone call finished, rear view camera display blank, USB issues, Bluetooth/Favorite Bar/Voice, iPod unable to detect via USB, recognition concerns, XM speech recognition inoperative, traffic messages, clock display.

display does not always return to the previous call/source screen when a Bluetooth call has ended and/or that the call timer may continue to flash and increment. The call/source screen staying displayed is a normal operating characteristic and cannot be changed. Technician should updated the Human Machine Interface to prevent the call timer from flashing and incrementing after the call has ended.

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

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

and to correct the customers concern of the radio being loud during navigation.

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.

techline/service programming systems.

correct the customers concern loss XM services, noise and/or water leak.

Display, NAV Screen Audio Content is Unavailable via Speech Recognition, Display Screen is Stuck on Incoming Call View After Phone Call Finished, Rear View Camera Display Blank, USB Issues/Bluetooth/Favorite Bar/Voice, iPod Unable to Detect via USB, Recognition Concerns, XM Speech Recognition Inoperative, Traffic Messages, Clock Display

locks up, slow response time, vertical lines between the clock and temp guage, and poor FM reception.

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.

the radio "maximum number of phones are currently paired to the vehicle". Dealer should advise the customer this is normal operation of the vehicle due to the maximum number of five phones can be paired to a vehicle.

DISPLAYS, FLASHING DISPLAYS, ERROR OR UPDATE FAILED MESSAGES, NAVIGATION MAP NOT LOADING, BLUETOOTH OR USB CONCERNS. TECHNICIAN SHOULD INSPECT THE USB/SD CARD PORT FOR A SD CARD OR A DEVICE PLUG INTO ANY OF THE USB PORTS.

NEW SOFTWARE HAS BEEN RELEASED TO CORRECT THIS CONCERN.

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

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

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

NEW SOFTWARE HAS BEEN RELEASED TO CORRECT THIS CONCERN.

THE RADIO IS ON, IT DOES NOT MUTE ENOUGH WHEN THE ONSTAR TURN-BY-TURN NAVIGATION DIRECTIONS ARE ANNOUNCED DUE TO CUSTOMER IMPROPERLY SETTING THE RADIO VOLUME HIGH ENOUGH WHEN THE TURN-BY-TURN NAVIGATION MESSAGES ARE PLAYED. "

BLUE SCREEN, AM CLIPPING NOISE, HD ON/OFF STATUS NOT RETAINED IN STATIONS, TIME LAG ON TRANSITIONS, NO AUDIO WITH INTERNAL AMP, PARK ASSIST SYMBOL POSITION WRONG IN REAR VIEW CAMERA.

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

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

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.

transmission installation.

part number 24236933 is currently transitioning from a kit to the filter (24236517) and seal (24225347) being sold individually.

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.

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

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.

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

test.

for metal.

repaired for the flare and its still noticed.

in addressing torque converter clutch shudder concerns.

that shift feels to be too firm (harsh) or may slip or flare.

Indicator Lamp (MIL) illuminated and a technician finding DTC P0741:Torque Converter Clutch Stuck Off, set.

manual transmissions that repair attempts will not change.

test.

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

repaired for the flare and its still noticed.

The different noises caused by driver habit, weather conditions , and normal manual transmission noises.

Allison transmission and to gather information on the transmission.

customer concern of low milage harsh shifting.

Technician may find Diagnostic Trouble Codes P0601, P0603, P0604, P062F or P1621 stored in the Transmission Control Module. Technician will need to ensure that the Diagnostic Trouble Codes are set in the Transmission Control Module. If the Diagnostic Trouble Codes are only set in the Transmission Control Module reprogram the Transmission Control Module.

THAT MAY HAVE A GRIND, POP, SHUDDER OR BIND FEELING/NOISE IN THE STEERING COLUMN WHEN TURNING LEFT OR RIGHT. TECHNICIAN WILL INSPECT FOR THE LOWER COLUMN BEARING TO BE OUT OF POSITION AND THE UPPER INTERMEDIATE STEERING SHAFT TO LOWER COLUMN SHAFT BOLT AND NUT MAY BE CONTACTING THE INHIBITOR/SHIFTIER CABLE BRACKET. TECHNICIAN WILL REPLACE THE STEERING COLUMN FOR THIS CONCERN.

ON CERTAIN VEHICLES EQUIPPED WITH 8-SPEED AUTOMATIC TRANSMISSION (M5U), THE CUSTOMER MAY COMPLAIN ABOUT HARSH SHIFTING. THIS CAN OCCUR IF THE VEHICLE EXPERIENCED MULTIPLE TRANSMISSION REPROGRAMMING EVENTS DURING MANUFACTURING, CAUSING THE CALIBRATION TO OVER-ADJUST THE SHIFT PARAMETERS. THIS BULLETIN PROVIDES A SERVICE ADAPTIVE LEARN PROCEDURE THAT SHOULD BE RUN TO RESET THE CALIBRATION TO THE BASELINE PARAMETERS.

THIS BULLETIN PROVIDES A SERVICE PROCEDURE TO REPLACE THE TORQUE CONVERTER ON CERTAIN 2015 MODEL YEAR CHEVROLET SILVERADO HD, GMC SIERRA HD AND GMC SIERRA DENALI HD VEHICLES EQUIPPED WITH AN ALLISON 6-SPEED AUTOMATIC TRANSMISSION (RPO MW7). THESE VEHICLES MAY HAVE BEEN ASSEMBLED WITH AN INCORRECTLY MACHINED TORQUE CONVERTER. CUSTOMERS MAY EXPERIENCE NOISE, POOR PERFORMANCE AND, IF THIS CONDITION IS NOT CORRECTED, EVENTUAL TRANSMISSION FAILURE.

THIS BULLETIN PROVIDES A SERVICE PROCEDURE TO REPLACE THE TORQUE CONVERTER ON CERTAIN 2015 MODEL YEAR CHEVROLET SILVERADO HD, GMC SIERRA HD AND GMC SIERRA DENALI HD VEHICLES EQUIPPED WITH AN ALLISON 6-SPEED AUTOMATIC TRANSMISSION (RPO MW7). THESE VEHICLES MAY HAVE BEEN ASSEMBLED WITH AN INCORRECTLY MACHINED TORQUE CONVERTER. CUSTOMERS MAY EXPERIENCE NOISE, POOR PERFORMANCE AND, IF THIS CONDITION IS NOT CORRECTED, EVENTUAL TRANSMISSION FAILURE.

THIS BULLETIN PROVIDES A SERVICE PROCEDURE TO REPLACE THE TORQUE CONVERTER ON CERTAIN 2015 MODEL YEAR CHEVROLET SILVERADO HD, GMC SIERRA HD AND GMC SIERRA DENALI HD VEHICLES EQUIPPED WITH AN ALLISON 6-SPEED AUTOMATIC TRANSMISSION (RPO MW7). THESE VEHICLES MAY HAVE BEEN ASSEMBLED WITH AN INCORRECTLY MACHINED TORQUE CONVERTER. CUSTOMERS MAY EXPERIENCE NOISE, POOR PERFORMANCE AND, IF THIS CONDITION IS NOT CORRECTED, EVENTUAL TRANSMISSION FAILURE. "

ON EXTERIOR CASE OF GEAR DUE TO THE MANUFACTURING PROCESS."

CARRIER ASSEMBLY DUE TO WHINNYING NOISE OF TRANSMISSION GEAR. MODEL ESCALADE, ESCALADE ESV, SILVERADO LD CREW, LTZ, SIERRA LD CREW, LD CREW DENALI, YUKON, YUKON DENALI, YUKON XL, XL DENALI. *PE

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.

shipping film.

Guidelines.

characteristic.

Aluminum Wheels.

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

addressing underbody component corrosion with customers.

Guidelines.

addressing underbody component corrosion with customers.

characteristic.

Replacement Guidelines.

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

addressing underbody component corrosion with customers.

labels that are visible on the frame The frame labels are only required during the manufacturing process and can be removed during pre-delivery inspection (PDI). There are two labels on the frame: the left front label (1) visible underneath the driver's door and the right front label (2) visible through the wheelhouse. Use care when removing the labels to prevent damage to the wax coating on the frame. Use a plastic trim tool to lift up on the edge and then pull the label off. The time required to perform this action is included in the PDI base time.

Some customers may comment that one or more of their vehicle's underbody components are showing some form of corrosion. This corrosion may be red in appearance (rust) if the component is steel, forged iron or cast iron. This corrosion may also be grey or white in color if the component is constructed of an aluminum alloy.

Some customers may comment that one or more of their vehicle's underbody components are showing some form of corrosion. This corrosion may be red in appearance (rust) if the component is steel, forged iron or cast iron. This corrosion may also be grey or white in color if the component is constructed of an aluminum alloy.

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

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

rearview mirrors on a vehicle not originally equipped with them.

rearview mirrors on a vehicle not originally equipped with them.

when the protective shipping film is removed from certain vehicles.

chromed aluminum wheels, along with warranty information regarding these conditions.

Technician should test another panel on a clean surface above room temperature. Technician will use a 2 inch wide piece of masking tape to the body, and pull upward quickly. If the paint flakes or peels away, the panel in question should be repaired.

front side door glass area.

mirror and the reverse tilt

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

driver or passenger front door armrest area.

rearview mirrors on a vehicle not originally equipped with them.

THIS BULLETIN PROVIDES A SERVICE PROCEDURE TO REMOVE AND REINSTALL THE DOOR LATCH FASTENERS ON THE DRIVER'S SIDE FRONT AND REAR DOOR ON CERTAIN VEHICLES. THESE FASTENERS MAY HAVE BEEN INSTALLED BELOW PROPER TORQUE SPECIFICATIONS, AND OVER TIME, COULD ALLOW A REDUCTION IN CLAMP LOAD, RESULTING IN A POTENTIAL DOOR RATTLE.

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

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

AND SIDE WINDOWS WHEN THE VEHICLE IS IN THE SUNLIGHT.

CORROSION WITH CUSTOMERS.

analysis.

additive.

additive.

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.

Driver Information Center Messages

additive.

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.

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.

DIC, DTC P2463 May be set

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

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

fuel tank from Chassis Cab trucks with RPO N2N dual fuel tanks.

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

documents and scan 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 may be observed.

customer concerns of XM/Cellular Mobile Phone/OnStar antenna looseness or damage, XM/Cellular/OnStar reception performance degraded, rattle/flutter/squeak noise, wind noise/whistle at highway speeds, and/or a water leak on headliner at sunvisor.

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.

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.

and Utilities may ask if they can lower their tire pressures. Tire pressures being set to the "Tire and Loading Label" will ensure the safe handling and ride characteristics of the truck and should not be lowered.

Vehicles.

and Utilities may ask if they can lower their tire pressures. Tire pressures being set to the "Tire and Loading Label" will ensure the safe handling and ride characteristics of the truck and should not be lowered.

and Utilities may ask if they can lower their tire pressures. Tire pressures being set to the "Tire and Loading Label" will ensure the safe handling and ride characteristics of the truck and should not be lowered.

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.

The Communication ID field did not permit me to enter the complete Communication ID as it is in our internal system. This product is a steel wheel. The customer communication requested return of unsold inventory to inspect the wheel for material dimension. If the material fails to meet the manufacturing specification, the wheel may not perform as expected. If the wheels are not returned, then warranty rate may increase. This product affects the following vehicles: 2011-2019 Chevrolet Silverado 2500HD & 3500HD, 2011-2019 GMC Sierra 2500HD & Sierra 3500HD.

The customer communication requested return of unsold inventory to inspect for the shape of the centerpiece of the tire hoist being round when it should be square. If the centerpiece is the incorrect shape then the tire hoist cannot be operated with the OE tools, and the end user would therefore not be able to lower the spare tire with the vehicles original tools.

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.

matching depth of socket used on the wheel nut.

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

EQUIPMENT.

strut due to fluid leak.

strut due to fluid leak.

disk on gasket sealing surfaces or reused parts.

Turns.

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.

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.

bounce, bucking from the rear of the truck while braking when towing a gooseneck or fifth wheel trailer. Technician will need to measure the actual truck and trailer weights, with the trailer loaded to the point that exhibits the condition. If any weight parameter is exceeded such as the Front Gross Axle Weight Rating, Rear Gross Axle Weight Rating, Gross Vehicle Weight Rating, or Gross Combined Weight Rating the load must be reduced before investigating further. If evaluation of the trailer’s brakes indicates trailer brake capability is adequate, adjust brake controller per the Trailer Gain Adjustment Procedure described in the Driving and Operating section of the Owner’s Manual and evaluate truck and trailer combination for braking shudder.

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.

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).

THIS BULLETIN PROVIDES A SERVICE PROCEDURE TO INSPECT AND, IF REQUIRED, RETIGHTEN THE TORQUE ON THE RIGHT-REAR-BRAKE-LINE-BRACKET BOLT TO THE REAR-AXLE ON CERTAIN FORT WAYNE ASSEMBLY PLANT BUILT 2014-2015 CHEVROLET SILVERADO LD, 2015 CHEVROLET SILVERADO HD, 2014-2015 GMC SIERRA LD, 2015 GMC SIERRA HD AND 2015 GMC SIERRA DENALI LD VEHICLES. THESE VEHICLES MAY HAVE BEEN ASSEMBLED WITH AN INCORRECTLY TORQUED RIGHT-REAR-BRAKE-LINE-BRACKET BOLT TO THE REAR AXLE. THIS CONDITION COULD ALLOW THE BRAKE LINE TO WEAR AGAINST THE REAR-AXLE HOUSING AND CAUSE A BRAKE-FLUID LEAK.

THIS BULLETIN PROVIDES A SERVICE PROCEDURE TO INSPECT AND, IF REQUIRED, RETIGHTEN THE TORQUE ON THE RIGHT-REAR-BRAKE-LINE-BRACKET BOLT TO THE REAR-AXLE ON CERTAIN FORT WAYNE ASSEMBLY PLANT BUILT 2014-2015 CHEVROLET SILVERADO LD, 2015 CHEVROLET SILVERADO HD, 2014-2015 GMC SIERRA LD, 2015 GMC SIERRA HD AND 2015 GMC SIERRA DENALI LD VEHICLES. THESE VEHICLES MAY HAVE BEEN ASSEMBLED WITH AN INCORRECTLY TORQUED RIGHT-REAR-BRAKE-LINE-BRACKET BOLT TO THE REAR AXLE. THIS CONDITION COULD ALLOW THE BRAKE LINE TO WEAR AGAINST THE REAR-AXLE HOUSING AND CAUSE A BRAKE-FLUID LEAK.

VEHICLES INVOLVED IN THIS SERVICE UPDATE WERE PLACED ON STOP DELIVERY OCTOBER 16, 2015. THIS BULLETIN PROVIDES A SERVICE PROCEDURE TO INSTALL A MIRROR SWITCH, BEZEL AND WIRE HARNESS IN CERTAIN VEHICLES EQUIPPED WITH POWER OUTSIDE REAR VIEW MIRRORS (RPO DL8 OR DPN). THESE VEHICLES WERE BUILT WITHOUT A MIRROR ADJUSTMENT SWITCH ON THE DRIVERS SIDE DOOR PAD CAUSING THE INABILITY TO ADJUST THE GLASS POSITION OF THE POWER OUTSIDE REAR VIEW MIRROR.

BRACKET BOLT TO REAR AXLE DUE TO INCORRECTLY BEING TORQUED ALLOWING BRAKE LINE TO WEAR AGAINST REAR AXLE HOUSING AND BRAKE FLUID LEAKAGE. MODEL 2014-15 SILVERADO LD, SIERRA LD, 2015 SILVERADO HD, SIERRA HD, SIERRA DENALI HD. *PE

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

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

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).

link between the tools were to become dis-connected.

GM remote start doesn't work with the Onstar remotelink phone application.

CERTAIN VEHICLES MAY HAVE INACCURATE TOWING CAPACITY VALUES REPORTED IN THE OWNERS MANUAL. USE OF HIGHER THAN RECOMMENDED MAXIMUM TRAILER WEIGHT COULD RESULT IN A POWERTRAIN COOLING SYSTEM OVERHEAT CONDITION IF OPERATING THE VEHICLE UNDER CERTAIN HIGH AMBIENT TEMPERATURE AND ROAD GRADE CONDITIONS. DEALERS ARE TO PLACE A COPY OF AN UPDATED TOWING CAPACITY TABLE SUPPLEMENT IN THE OWNER MANUAL. GM WILL MAIL THE SUPPLEMENT TO CUSTOMERS OF RECORD.

THE TOTAL NUMBER OF U.S. VEHICLES INVOLVED HAS BEEN EXPANDED.

THE TOTAL NUMBER OF U.S. VEHICLES INVOLVED HAS EXPANDED.

THIS MESSAGE IS TO INFORM DEALERS THAT THE TOTAL NUMBER OF U.S. VEHICLES INVOLVEDIN THIS FIELD ACTION PLACED ON STOP DELIVERY ON OCTOBER 16, 2015, HAS BEEN CONDENSED TO 871.

THIS MESSAGE IS TO INFORM DEALERS THAT THE TOTAL NUMBER OF U.S. VEHICLES INVOLVEDIN THIS FIELD ACTION PLACED ON STOP DELIVERY ON OCTOBER 16, 2015, HAS BEEN CONDENSED TO 871.

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

EFFECTIVE IMMEDIATELY, STOP THE DELIVERY OF CERTAIN VEHICLES. ALL VEHICLES THAT ARE IN DEALER INVENTORY AND LISTED MUST BE HELD AND NOT DELIVERED TO CUSTOMERS, DEALER TRADED, OR USED FOR DEMONSTRATION PURPOSES UNTIL FURTHER INSTRUCTIONS ARE RECEIVED. INSTRUCTIONS FOR RELEASING THE INVOLVED VEHICLES FROM THIS STOP DELIVERY WILL BE PROVIDED IN THE NEAR FUTURE.

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.

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.

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

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.

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.

weather climates and testing those batteries.

cold weather climates and testing those batteries.

odors emitted from the HVAC system at vehicle start-up in hot, humid conditions.

Select 2015 model year vehicles will receive a software download via OnStar to update the software for the Electronic Climate Control (ECC) system. This over-the-air update is being piloted on a few hundred customer vehicles in the mid-October thru mid-December timeframe. Pending the successful completion of the pilot, rollout to the general vehicle population will begin in January 2016.

Upholstery, Accessory Seat Heaters or Other Comfort Enhancing Devices

SELECT 2015 VEHICLES WILL RECEIVE A SOFTWARE DOWNLOAD VIA ONSTAR TO UPDATE THE SOFTWARE FOR THE ELECTRONIC CLIMATE CONTROL (ECC) SYSTEM. THE UPDATE WILL BE PERFORMED ON DEALER INVENTORY VEHICLES, WITH THE UPDATE OCCURRING DURING THE NIGHT TIME HOURS OF 1AM TO 5AM EDT. UPDATES WILL BE ROLLED OUT TO THE INVENTORY STARTING 6/29/2015 AND COMPLETE BY END OF SEPTEMBER 2015. NO FURTHER ACTION IS REQUIRED BY THE DEALER. THIS UPDATE WILL TAKE APPROXIMATELY 15 MINUTES.

PERIOD OF TIME AND/OR SET IN COLD WEATHER CLIMATES AND TESTING THOSE BATTERIES.

fluid leak concern that is caused during extremely low temperatures.

fluid leak concern that is caused during extremely low temperatures.

experience a steering hose leak.

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

reservoir.

THE BULLETIN PROVIDES A FURTHER SERVICE PROCEDURE TO INSPECT VEHICLES AND REPLACE THE POWER STEERING COOLER ASSEMBLY AS NEEDED ON CERTAIN 2015 MODEL YEAR CHEVROLET SILVERADO 2500/3500 HD AND GMC SIERRA 2500/3500 HD VEHICLES THAT WERE PREVIOUSLY SERVICED PRIOR TO SEPTEMBER 9, 2014 PURSUANT TO RECALL BULLETIN 14356 (SINCE SUPERSEDED BY BULLETIN 14356A). THESE VEHICLES MAY HAVE BEEN BUILT WITH A HOSE CONNECTION WITHIN THE POWER STEERING COOLER ASSEMBLY THAT IS MISSING THE FERRULE OR FERRULE CRIMP. IF THE VEHICLE IS DRIVEN WITHOUT THE FERRULE OR FERRULE CRIMP, THERE MAY BE A LOSS OF POWER STEERING FLUID.

THIS BULLETIN PROVIDES A FURTHER SERVICE PROCEDURE TO INSPECT VEHICLES AND REPLACE THE POWER STEERING COOLER ASSEMBLY AS NEEDED ON CERTAIN VEHICLES THAT WERE PREVIOUSLY SERVICED PRIOR TO SEPTEMBER 9, 2014 PURSUANT TO RECALL BULLETIN 14356 (SINCE SUPERSEDED BY BULLETIN 14356A). THESE VEHICLES MAY HAVE BEEN BUILT WITH A HOSE CONNECTION WITHIN THE POWER STEERING COOLER ASSEMBLY THAT IS MISSING THE FERRULE OR FERRULE CRIMP. IF THE VEHICLE IS DRIVEN WITHOUT THE FERRULE OR FERRULE CRIMP, THERE MAY BE A LOSS OF POWER STEERING FLUID.

from Rear Leaf Springs.

from Rear Leaf Springs.

from Rear Leaf Springs.

noise from the metals making contact.

Technician will need to replace the wheel for a rolled lip of aluminum in the hub opening.

concern of a squeaking noise from the rear suspension.

Technician will need to replace the wheel for a rolled lip of aluminum in the hub opening.

has a fluid residule from a possible external source from a leaking shaft seal.

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.

CUSTOMER CONCERN OF A CLUNKING NOISE COMING FROM THE REAR OF THE VEHICLE.

REGARDING THE SEAT BELT WEBBING OR LATCH PLATE COMING TWISTED.