2015 Gmc Yukon Denali 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.

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

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

GDS 2.

issue.

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.

occurrence.

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.

This is normal operation of the vehicle built with regular production code BTM and without Regular Production Option Code AVF. If the vehicle was built with regular production code BTM and AVF only has a 1 hour idle time.

conductive finish.

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

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

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

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

and improve fuel economy.

service or aftermarket calibrations.

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

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

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.

GDS 2.

engine related shudder.

consumption.

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

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).

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.

may have no Reverse and no 2nd gear.

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

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

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

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

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

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

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

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

We are reminding dealers to review the Applicable Warranties section in IVH to determine if this Special Coverage applies.

GDS 2.

Identification.

consumption.

service or aftermarket calibrations.

internal engine damage.

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

which will need to be installed to correct the repair.

Recommendations.

and improve fuel economy.

engine related shudder.

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

This is normal operation of the vehicle built with regular production code BTM and without Regular Production Option Code AVF. If the vehicle was built with regular production code BTM and AVF only has a 1 hour idle time.

Dealers Only).

Dealers Only).

or the vehicle has sat for a few hours.

engine related shudder.

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.

This is normal operation of the vehicle built with regular production code BTM and without Regular Production Option Code AVF. If the vehicle was built with regular production code BTM and AVF only has a 1 hour idle time.

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.

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

passage seal or incorrect1-2-7-8-R clutch fluid passage seal being install for a no movement concern after valve body replacement on the 8L45 or 8L90 transmissions.

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.

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.

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

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

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

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

repairing vehicles that may have unwanted grade braking, reduced engine power with no Driver Information Center messages ? Brake Pedal Override Feature ?, transmission busy or frequent shifting up or down, and Diagnostic Trouble Codes P057B, P057C, and/or P057D may or may not be set. Technician will use this preliminary information to find the brake pedal position data parameters in the scan tool, and also to provide some additional diagnostic help. These issues may be caused by an incorrect brake pedal position sensor input to the engine control module. Technician will verify with the scan tool if the engine control module has the correct parameters for the brake pedal position sensor. If an engine control module brake pedal position sensor relearn is performed, the truck may be temporarily repaired until the intermittent wiring issue between the engine control module and brake pedal position sensor occurs again. On 2014 and newer trucks inspect and repair any damage to X115 and X119. On the 2014 and previous trucks inspect and repair any damage to X205.

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.

Dealers Only).

Trailer Brake message in the Driver Information Center. Also the vehicle will have a Diagnostic Trouble Code U0415 set. Technician will fill the master cylinder brake fluid reservoir to the maximum level.

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.

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

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

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).

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.

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

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.

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.

characterizationusing the transmission unit number (TUN) off a replacement 8L90 RPO M5U automatic transmission to refer to the TUNslisted in this PI. If the TUN off the replacement transmission is listed they should refer to bulletin 18-NA-355 and perform a transmission fluid exchange due to possible fluid contamination. The dealer technician is to call technicalassistance after the fluid exchange to get the TUN unlocked so they will then be able tocomplete solenoid valve characterization procedure.

This is normal operation of the vehicle built with regular production code BTM and without Regular Production Option Code AVF. If the vehicle was built with regular production code BTM and AVF only has a 1 hour idle time.

This is normal operation of the vehicle built with regular production code BTM and without Regular Production Option Code AVF. If the vehicle was built with regular production code BTM and AVF only has a 1 hour idle time.

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.

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

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

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

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.

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

vehicles that may have a Service Engine Soon Malfunction Indicator Lamp on at low mileage. Technician may find Diagnostic Trouble Codes P0420 and or P0430 stored. Technician should be advised that the catalytic converter efficiency Diagnostic Trouble Codes P0420 and P0430 are disabled for the first hour of engine run time to allow break-in of the catalytic converter. Technician will need to use a Tech2 to check the verify engine run time on the Engine Hour Meter in the Instrument Panel Cluster Data Display/Data 1 List in the scan tool match. If the engine run time is less than one hour, the battery may have been disconnected, or another vehicle power loss event may have occurred, during vehicle manufacturing. Technician will need to clear the Diagnostic Trouble Codes and perform a drive cycle. If the catalytic converter was replaced and the Diagnostic Trouble Codes set it may be a result of the engine run time restrictions no longer being in place since the vehicle is no longer new. Technician will need to clear the Diagnostic Trouble Codes and perform a drive cycle.

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.

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.

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).

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

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

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

Engine Soon Malfunction Indicator Lamp on, engine misfire, and/or engine noise. Technician may find Diagnostic Trouble Codes P0300-P0308. If published Service Information diagnostics does not isolate the cause of this concern technician should check for a worn camshaft lobe and/or lifter roller, a sticking valve, valve leakage, a broken valve spring, and a collapsed active fuel management lifter.

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

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

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.

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

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

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

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.

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

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

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

long crank time during cold ambient air temperatures. Direct Injection systems run at higher pressures, and the mechanical pump on the engine must build up the required pressure before the first injection event occurs. Direct Injection engines may have slightly longer cold crank times than that of port fuel engines.

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

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

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

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

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

vehicles that may have a no crank concern. Technician will need to check the valve train for movement when the engine is cranked. If the valve train is not moving while the crankshaft is moving the front cover will need to be removed to inspect for a sheared cam sprocket locator pin. If the cam sprocket locator pin has sheared, replace the engine assembly. If the valve train is rotating during inspection, disconnect the Camshaft Position sensor and check if the engine will start. If the engine starts front cover will need to be removed to inspect for a sheared cam sprocket locator pin. If the cam sprocket locator pin has sheared, replace the engine assembly. If the engine does not start with the Camshaft Position sensor disconnected the follow published “Engine Cranks But Does Not Run” diagnosis in Service Information. Also perform an Engine Compression Test and Cylinder Leakage Test in Service Information documents all results. If the Service Information procedures above isolate an engine mechanical concern then removed to inspect for a sheared cam sprocket locator pin. If the cam sprocket locator pin has sheared, replace the engine assembly.

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

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

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

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

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

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

repairing vehicles that may have unwanted grade braking, reduced engine power with no Driver Information Center messages “ Brake Pedal Override Feature “, transmission busy or frequent shifting up or down, and Diagnostic Trouble Codes P057B, P057C, and/or P057D may or may not be set. Technician will use this preliminary information to find the brake pedal position data parameters in the scan tool, and also to provide some additional diagnostic help. These issues may be caused by an incorrect brake pedal position sensor input to the engine control module. Technician will verify with the scan tool if the engine control module has the correct parameters for the brake pedal position sensor. If an engine control module brake pedal position sensor relearn is performed, the truck may be temporarily repaired until the intermittent wiring issue between the engine control module and brake pedal position sensor occurs again. On 2014 and newer trucks inspect and repair any damage to X115 and X119. On the 2014 and previous trucks inspect and repair any damage to X205.

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

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

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.

long crank time during cold ambient air temperatures. Direct Injection systems run at higher pressures, and the mechanical pump on the engine must build up the required pressure before the first injection event occurs. Direct Injection engines may have slightly longer cold crank times than that of port fuel engines.

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

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.

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

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

GENERAL MOTORS HAS DECIDED THAT CERTAIN VEHICLES EQUIPPED WITH 8-SPEED TRANSMISSION (RPO M5U) MAY HAVE TRANSMISSION GEAR WHINE NOISE. TO ADDRESS THIS CONDITION WE WILL BE RELEASING SERVICE UPDATE BULLETIN 15178 AS SOON AS A SUFFICIENT QUANTITY OF REPLACEMENT PARTS IS AVAILABLE. IT IS ESTIMATED THAT ONLY 5% OF THE INVOLVED VEHICLES WILL REQUIRE REPAIR.

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 REPROGRAM THE TRANSMISSION CONTROL MODULE (TCM) ON CERTAIN 2015 MODEL YEAR CADILLAC ESCALADE, ESCALADE ESV, CHEVROLET SILVERADO, GMC SIERRA, YUKON DENALI AND YUKON DENALI XL VEHICLES EQUIPPED WITH AN 8L90 8-SPEED (M5U) TRANSMISSION AND 6.2L (L86) ENGINE. THESE VEHICLES MAY HAVE A CONDITION IN WHICH TRANSMISSION CALIBRATION ALLOWS A HIGHER THAN TARGET ENERGY INPUT TO THE TORQUE CONVERTER CLUTCH (TCC) UNDER CERTAIN CONDITIONS. THIS MAY LEAD TO FASTER THAN EXPECTED TORQUE CONVERTER CLUTCH MATERIAL WEAR, AND A SHUDDER FEELING WHEN THE TCC IS APPLIED.

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).

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.

DIAGNOSING A SERVICE DRIVER ASSIST MESSAGE WITH A DIAGNOSTIC TROUBLE CODE B172E AND OR A B172F. THE HAPTIC SEAT MOTOR HAS A PIGTAIL LEAD COMING OFF OF IT. IN MANY CASES THE WIRING PIGTAIL NEAR THE HAPTIC SEAT MOTOR HAS BROKEN AND WILL REQUIRE REPLACEMENT.

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.

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

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.

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

services and maintenance on vehicles originating/sold in Canada.

replacements.

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

Only).

before being sold (prepping) to the customer.

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

a fluid leak, and what is considered fluid seepage.

Assistance Center (TAC).

Only).

programs.

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.

(WPC) Parts Return Program.

Only).

and Canada Dealers Only).

Only).

Only).

submit a Pre-Repair Authorization (PRA).

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.

independent causes (GM Canada Dealers Only).

replacements.

replacements.

Spin-On Oil Filters.

vehicles before sold (prepping) to the customer.

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.

replacement

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.

Allegation Resolution (PAR) claim.

Allegation Resolution (PAR) claim.

offered through GM.

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

Allegation Resolution (PAR) claim.

offered through GM.

offered through GM.

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

offered through GM.

interiors of GM vehicles.

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

loss and/or coolant odor after driving the vehicle. Technician will need to test the cooling system looking for leaks at the outer head bolts. If coolant is found replace the head the concern is present on.

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.

providing additional information on the AFM and DFM systems

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

endedfor the 8L45 and 8L90 park actuator rod.

loss and/or coolant odor after driving the vehicle. Technician will need to test the cooling system looking for leaks at the outer head bolts. If coolant is found replace the head the concern is present on.

memory position.

for the 8L45 and 8L90 park actuator rod. The dealer technician is advised to call the GM Product Quality Center for further assistance.

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.

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.

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.

repairing wiring harnesses.

warranty replacements.

warranty replacements.

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.

block with a loose fuse connection. Technician will need to check terminal tension on the rear fuse block. Technician will need to replace the rear body fuse block if poor terminal tension is the issue. Technician will need to replace the appropriate terminated lead if something other than the main power buss bar has poor terminal tension.

inoperative due to the F2DL and/or the F8DL fuse(s) being open. Inspect the center console harness area at the hinge pivot point for chaffed circuits.

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

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.

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.

inoperative due to the F2DL and/or the F8DL fuse(s) being open. Inspect the center console harness area at the hinge pivot point for chaffed circuits.

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

hesitation when opening and closing the power liftgate. There may be a diagnostic trouble code B153A set in the power liftgate module. This concern could occur if the left liftgate actuator is internally coming apart. The actuator will need to be replaced however care must be taken when removing the actuator from the vehicle. If the internal portion of the actuator had completely separated the end of the actuator could become a projectile when removed. Obtain a number 8 self-tapping screw that measures 1 inches long. Fully open the liftgate and install the screw anywhere in a 30 millimeter space from the bottom of the smooth tube to secure the tubes. Continue with the liftgate actuator by following the liftgate power assist actuator procedure in service information.

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

block with a loose fuse connection. Technician will need to check terminal tension on the rear fuse block. Technician will need to replace the rear body fuse block if poor terminal tension is the issue. Technician will need to replace the appropriate terminated lead if something other than the main power buss bar has poor terminal tension.

programmedfob in the vicinity of the passive liftgate antenna. If the antenna can locate a programmed fob in saidarea, the gate will open if the liftgate open switch or hands free sensor is activated.

position reverse tilt position is inoperative.

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).

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.

concern of the display is showing 32° F (0° C) after a battery or reprogramming a module. The outside temperature will begin to update if driven above 20 mph for at least 5 minutes. If the vehicle speed drops below 20 mph, the timer will reset and the display will stop updating. Once the display starts to update it may take several more minutes of driving above 20 mph for the display to fully update. Also if the vehicle is shut off for more than 8 hours the display will update when the ignition is turned on.

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.

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.

block with a loose fuse connection. Technician will need to check terminal tension on the rear fuse block. Technician will need to replace the rear body fuse block if poor terminal tension is the issue. Technician will need to replace the appropriate terminated lead if something other than the main power buss bar has poor terminal tension.

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

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.

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.

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.

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

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.

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.

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.

Slips, or Flares.

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

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

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

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

Slips, or Flares.

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

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

Start Up/Shift of the Day Under Light Throttle.

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

harnesses for the 8 speed RWD transmissions are not listed in the Electronic Parts Catalog. Technicians are to refer to the information provided in this document to obtain the internal wiring harness part numbers by application.

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

Start Up/Shift of the Day Under Light Throttle.

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

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.

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

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

test.

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.

harnesses for the 8 speed RWD transmissions are not listed in the Electronic Parts Catalog. Technicians are to refer to the information provided in this document to obtain the internal wiring harness part numbers by application.

harnesses for the 8 speed RWD transmissions are not listed in the Electronic Parts Catalog. Technicians are to refer to the information provided in this document to obtain the internal wiring harness part numbers by application.

transmissions and 4 wheel drive may exhibit a condition of grinding/ratcheting type noise when shifting the automatic transmission into park while the transfer case is in 4 wheel drive low (4LO) range. Dealers technician's are advised this condition should be deemed a normal characteristic of 4WD low operation.

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

repaired for the flare and its still noticed.

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 crusing 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.

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 CHECK AND ADJUST TRANSMISSION FLUID LEVELS ON THE VEHICLES LISTED ABOVE. THESE VEHICLES MAY EXPEL EXTRA TRANSMISSION FLUID OUT OF A VENT FITTING AND HOSE ON THE TOP OF THE TRANSMISSION.

addressing underbody component corrosion with customers.

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

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

shipping film.

Guidelines.

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

characteristic.

Aluminum Wheels.

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

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

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

addressing underbody component corrosion with customers.

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

Guidelines.

addressing underbody component corrosion with customers.

characteristic.

Replacement Guidelines.

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

addressing underbody component corrosion with customers.

whistle noise heard from the right or left rear quarter glass area when driving at highway speeds or with a cross wind. Technician will inspect the quarter glass for excessive urethane. If excessive urethane is found use a sharp knife and cut off the excessive urethane. Also the technician will install foam tape along the entire length of the tail light assembly.

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.

Technician is to make sure the rounded side of the cover is positioned towards the outboard side of the vehicle.

sounding when learning new key fobs after the original key fobs were lost. Technician will open the driver?s door and allow the Content Theft Deterrent alarm to activate, which will pulse the horns and exterior lamps for approximately 30 seconds and the alarm will shut off at this time. As long as the driver?s door remains open the alarm will not turn back on and the new transmitters can be programmed.

Front Camera, Service Lane Departure Warning, and Service Lane Keep Assist Message. Technician may find Diagnostic Trouble Code B1008 Sym 4B set. Technician will need to check the windshield to ensure it is not aftermarket. Technician will also check for anything that may impair the front view camera and ensure the camera is properly mounted.

Front Camera, Service Lane Departure Warning, and Service Lane Keep Assist Message. Technician may find Diagnostic Trouble Code B1008 Sym 4B set. Technician will need to check the windshield to ensure it is not aftermarket. Technician will also check for anything that may impair the front view camera and ensure the camera is properly mounted.

whistle noise heard from the right or left rear quarter glass area when driving at highway speeds or with a cross wind. Technician will inspect the quarter glass for excessive urethane. If excessive urethane is found use a sharp knife and cut off the excessive urethane. Also the technician will install foam tape along the entire length of the tail light assembly.

Technician is to make sure the rounded side of the cover is positioned towards the outboard side of the vehicle.

sounding when learning new key fobs after the original key fobs were lost. Technician will open the driver's door and allow the Content Theft Deterrent alarm to activate, which will pulse the horns and exterior lamps for approximately 30 seconds and the alarm will shut off at this time. As long as the driver's door remains open the alarm will not turn back on and the new transmitters can be programmed.

sounding when learning new key fobs after the original key fobs were lost. Technician will open the driver’s door and allow the Content Theft Deterrent alarm to activate, which will pulse the horns and exterior lamps for approximately 30 seconds and the alarm will shut off at this time. As long as the driver’s door remains open the alarm will not turn back on and the new transmitters can be programmed.

whistle noise heard from the right or left rear quarter glass area when driving at highway speeds or with a cross wind. Technician will inspect the quarter glass for excessive urethane. If excessive urethane is found use a sharp knife and cut off the excessive urethane. Also the technician will install foam tape along the entire length of the tail light assembly.

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

TECHNICIAN WILL ENSURE THE ROUNDED SIDE OF THE COVER IS POSITIONED TOWARDS THE OUTBOARD SIDE OF THE VEHICLE.

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

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

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

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

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

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

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

strut due to fluid leak.

strut due to fluid leak.

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.

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.

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.

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

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

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.

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.

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.

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

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

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

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

Vehicles.

repairs requiring balance and Road Force measurement.

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

repairs requiring balance and Road Force measurement.

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

ride characteristics of GM cars and trucks.

EQUIPMENT.

analysis.

additive.

additive.

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

additive.

additive.

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

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

additive.

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

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

Schedules.

Accessories.

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

Fog/Driving Lamp Damage.

Accessories.

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

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

and tail functions inside the tail lamps may become inoperative. Dealers are to replace tail lamps if they are found to be inoperative. The repairs will be made at no charge to the customer.

Dealers are to replace tail lamps if they are found to be inoperative. The repairs will be made at no charge to the customer.

vehicles, stop and tail functions inside the tail lamps may become inoperative. Dealers are to replace tail lamps if they are found to be inoperative. The repairs will be made at no charge to the customer.

that may have a rattle noise from the second row seat. Technician will need to inspect the striker not aligned properly in latch opening. To repair this condition, rework/adjust the striker in the direction to center it in the latch opening. An adjustable wide mouth metal working tool may be used to adjust the striker just enough to center in the latch opening. Technician may find a seat bottom latch may have an unequal latch opening side-to-side for the striker to seat into. To repair this condition, with the affected seat in the tumbled forward position, while applying steady, firm pressure, cycle the seat down into the latched position. Some vehicles built prior to 09/21/2015 with 60/40 Split Bench Seat may have 60-percent long side bench, inboard latch may not be properly aligned in striker opening. Technician will need to place a 2.6 mm thick flat washer over the 40 percent seat base stud, not the floor stud. Some vehicles may have a seat base plat that rattles against the rib in the floor pan. Apply Mylar tape to the floor pan under the seat plate to provide relief for the rattle condition.

weather climates and testing those batteries.

COMMENTS ONE LOOSE OR BROKEN.

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.

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.

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.

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.

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

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

REGARDING THE SEAT BELT WEBBING OR LATCH PLATE COMING TWISTED.