Public cases

The 2001 GMC Yukon suddenly lost reverse and park while driving and imploded the transmission in the process. The 2004 Buick Rendezvous started slipping and ceased to move by it's own power when at operating temperature. The 2006 GMC Yukon Denali stopped shifting gears while on the freeway at 55 mph and systematically lost all moving gears within a day also while at operating temperature.

Observed

The 2001 GMC Yukon suddenly lost reverse and park while driving and imploded the transmission in the process. The 2004 Buick Rendezvous started slipping and ceased to move by it's own power when at operating temperature. The 2006 GMC Yukon Denali stopped shifting gears while on the freeway at 55 mph and systematically lost all moving gears within a day also while at operating temperature.

Inspection

Not stated

Repair

Not stated

Outcome

Not stated

Why selected：The source's vehicle field says Yukon; whether it is an XL is not stated.

GM is receiving damaged (cracked or broken) transmission cores returned to the reman facilities. 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.

Communication summary

GM is receiving damaged (cracked or broken) transmission cores returned to the reman facilities. 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.

Why selected：The source's vehicle field includes the trim.

This bulletin provides information on the harmful effects of water or ethylene glycol in transmission fluid.

Communication summary

This bulletin provides information on the harmful effects of water or ethylene glycol in transmission fluid.

Why selected：The source's vehicle field includes the trim.

This Warranty Admin service bulletin provides guidelines for Dealers Not Required and for Dealers Required to Contact 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.

Communication summary

This Warranty Admin service bulletin provides guidelines for Dealers Not Required and for Dealers Required to Contact 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.

Why selected：The source's vehicle field includes the trim.

This PI bulletin advises the technician on the proper way to install the pistons in an engine.

Communication summary

This PI bulletin advises the technician on the proper way to install the pistons in an engine.

Why selected：The source's vehicle field includes the trim.

This service bulletin provides a vibration analysis worksheet the technician can use in conjunction with the appropriate Vibration Analysis-Road testing procedure when diagnosing vibration concerns.

Communication summary

This service bulletin provides a vibration analysis worksheet the technician can use in conjunction with the appropriate Vibration Analysis-Road testing procedure when diagnosing vibration concerns.

Why selected：The source's vehicle field includes the trim.

The service bulletin advises the tech of a normal transmission shift condition and the delay in throttle response when the throttle plate is opened rapidly and advises the customer that it is normal for the delay.

Communication summary

The service bulletin advises the tech of a normal transmission shift condition and the delay in throttle response when the throttle plate is opened rapidly and advises the customer that it is normal for the delay.

Why selected：The source's vehicle field includes the trim.

This bulletin provides information on the harmful effects of water or ethylene glycol in transmission fluid.

Communication summary

This bulletin provides information on the harmful effects of water or ethylene glycol in transmission fluid.

Why selected：The source's vehicle field includes the trim.

This Warranty Admin service bulletin provides guidelines for Dealers Not Required and for Dealers Required to Contact 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.

Communication summary

This Warranty Admin service bulletin provides guidelines for Dealers Not Required and for Dealers Required to Contact 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.

Why selected：The source's vehicle field includes the trim.

This bulletin provides information on Policies Applicable to All U.S. Dealers for Engine and Transmission Assembly Replacement Under Warranty, Policy or Customer Enthusiasm and information on Submission of Warranty Transaction in Global Warranty Management.

Communication summary

This bulletin provides information on Policies Applicable to All U.S. Dealers for Engine and Transmission Assembly Replacement Under Warranty, Policy or Customer Enthusiasm and information on Submission of Warranty Transaction in Global Warranty Management.

Why selected：The source's vehicle field includes the trim.

This Preliminary Information communication provides information to the technician to not remove the torque converter bolts and start the engine as this may cause damage to the torque converter of the crankshaft on vehicles equipped with an automatic transmission.

Communication summary

This Preliminary Information communication provides information to the technician to not remove the torque converter bolts and start the engine as this may cause damage to the torque converter of the crankshaft on vehicles equipped with an automatic transmission.

Why selected：The source's vehicle field says Yukon; whether it is an XL is not stated. The trim (Denali) is not stated.

This service bulletin provides information on OEM and Remanufactured Engine and Automatic Transmission/Transaxle Identification.

Communication summary

This service bulletin provides information on OEM and Remanufactured Engine and Automatic Transmission/Transaxle Identification.

Why selected：The source's vehicle field includes the trim.

This diagnostic tip advises the tech not to separate the flexplate from the torque convertor or damage my occur if the engine is started while diagnosing for noise from the engine or transmission.

Communication summary

This diagnostic tip advises the tech not to separate the flexplate from the torque convertor or damage my occur if the engine is started while diagnosing for noise from the engine or transmission.

Why selected：The source's vehicle field includes the trim.

OEM and Remanufactured Engine and Automatic Transmission/Transaxle Identification

Communication summary

OEM and Remanufactured Engine and Automatic Transmission/Transaxle Identification

Why selected：The source's vehicle field includes the trim.

This bulletin provides information on the harmful effects of water or ethylene glycol in transmission fluid.

Communication summary

This bulletin provides information on the harmful effects of water or ethylene glycol in transmission fluid.

Why selected：The source's vehicle field includes the trim.

This Warranty Admin service bulletin provides guidelines for Dealers Not Required and for Dealers Required to Contact 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.

Communication summary

This Warranty Admin service bulletin provides guidelines for Dealers Not Required and for Dealers Required to Contact 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.

Why selected：The source's vehicle field includes the trim.

This bulletin provides information on Policies Applicable to All U.S. Dealers for Engine and Transmission Assembly Replacement Under Warranty, Policy or Customer Enthusiasm and information on Submission of Warranty Transaction in Global Warranty Management.

Communication summary

This bulletin provides information on Policies Applicable to All U.S. Dealers for Engine and Transmission Assembly Replacement Under Warranty, Policy or Customer Enthusiasm and information on Submission of Warranty Transaction in Global Warranty Management.

Why selected：The source's vehicle field includes the trim.

This Bulletin provides guidelines for Dealers Not Required and for Dealers Required to Contact 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.

Communication summary

This Bulletin provides guidelines for Dealers Not Required and for Dealers Required to Contact 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.

Why selected：The source's vehicle field includes the trim.

This bulletin provides information on Policies Applicable to All U.S. Dealers for Engine and Transmission Assembly Replacement Under Warranty, Policy or Customer Enthusiasm and information on Submission of Warranty Transaction in Global Warranty Management.

Communication summary

This bulletin provides information on Policies Applicable to All U.S. Dealers for Engine and Transmission Assembly Replacement Under Warranty, Policy or Customer Enthusiasm and information on Submission of Warranty Transaction in Global Warranty Management.

Why selected：The source's vehicle field includes the trim.

This Bulletin provides guidelines for Dealers Not Required and for Dealers Required to Contact 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.

Communication summary

This Bulletin provides guidelines for Dealers Not Required and for Dealers Required to Contact 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.

Why selected：The source's vehicle field includes the trim.

This Bulletin provides guidelines for Dealers Not Required and for Dealers Required to Contact 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.

Communication summary

This Bulletin provides guidelines for Dealers Not Required and for Dealers Required to Contact 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.

Why selected：The source's vehicle field includes the trim.

This bulletin provides information on the harmful effects of water or ethylene glycol in transmission fluid.

Communication summary

This bulletin provides information on the harmful effects of water or ethylene glycol in transmission fluid.

Why selected：The source's vehicle field includes the trim.

This Bulletin provides guidelines for Dealers Not Required and for Dealers Required to Contact 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.

Communication summary

This Bulletin provides guidelines for Dealers Not Required and for Dealers Required to Contact 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.

Why selected：The source's vehicle field includes the trim.

This informational bulletin provides information for Automatic Transmission Oil Cooler Flow Test Essential Tool J-45096 TransFlow.

Communication summary

This informational bulletin provides information for Automatic Transmission Oil Cooler Flow Test Essential Tool J-45096 TransFlow.

Why selected：The source's vehicle field includes the trim.

This informational bulletin provides a process to the service agents that are not required to contact PQC, to determine when to replace a assembly as opposed to repairing and if an engine or transmission is being returned, that it has all the information in relation to that part being returned.

Communication summary

This informational bulletin provides a process to the service agents that are not required to contact PQC, to determine when to replace a assembly as opposed to repairing and if an engine or transmission is being returned, that it has all the information in relation to that part being returned.

Why selected：The source's vehicle field includes the trim.

This technical bulletin provides a procedure for replacing the throttle position sensor cover for concerns regarding a indicator lamp illuminated reduced power message displayed and DTC P2135 set.

Communication summary

This technical bulletin provides a procedure for replacing the throttle position sensor cover for concerns regarding a indicator lamp illuminated reduced power message displayed and DTC P2135 set.

Why selected：The source's vehicle field says Yukon; whether it is an XL is not stated. The trim (Denali) is not stated.

This information was created to inform the technician that the 2-3 upshift and the 3-2 downshift clunk is caused by the releasing of the 2-4 band and application of the 3-4 clutch assembly during an upshift. Also during a 3-2 downshift, the releasing of the 3-4 clutch during the application of the 2-4 band, can cause torque reversal down the output shaft creating a clunk. This is a normal condition.

Communication summary

This information was created to inform the technician that the 2-3 upshift and the 3-2 downshift clunk is caused by the releasing of the 2-4 band and application of the 3-4 clutch assembly during an upshift. Also during a 3-2 downshift, the releasing of the 3-4 clutch during the application of the 2-4 band, can cause torque reversal down the output shaft creating a clunk. This is a normal condition.

Why selected：The source's vehicle field includes the trim.

This bulletin provides information on the harmful effects of water or ethylene glycol in transmission fluid.

Communication summary

This bulletin provides information on the harmful effects of water or ethylene glycol in transmission fluid.

Why selected：The source's vehicle field includes the trim.

This technical bulletin provides a procedure on aftermarket ALSL or DLC devices causing multiple issues due to suspected tampering.

Communication summary

This technical bulletin provides a procedure on aftermarket ALSL or DLC devices causing multiple issues due to suspected tampering.

Why selected：The source's vehicle field includes the trim.

This informational bulletin provides information of suspected tampering or vehicle modifications for non-GM (Aftermarket) engine and transmission calibrations for V6 and V8 gasoline engines Using Tech 2® or global diagnostic system 2 (GDS 2)

Communication summary

This informational bulletin provides information of suspected tampering or vehicle modifications for non-GM (Aftermarket) engine and transmission calibrations for V6 and V8 gasoline engines Using Tech 2® or global diagnostic system 2 (GDS 2)

Why selected：The source's vehicle field includes the trim.

This informational bulletin provides information for service agents not required to contact product quality center for CNG, LPG or gasoline engine, transmission and/or transfer case.

Communication summary

This informational bulletin provides information for service agents not required to contact product quality center for CNG, LPG or gasoline engine, transmission and/or transfer case.

Why selected：The source's vehicle field includes the trim.

WHILE AT A STOP, THE VEHICLE LOST POWER AND THE TRACTION CONTROL WARNING INDICATOR ILLUMINATED. THE VEHICLE ACCELERATED EVENTUALLY.

Observed

WHILE AT A STOP, THE VEHICLE LOST POWER AND THE TRACTION CONTROL WARNING INDICATOR ILLUMINATED. THE VEHICLE ACCELERATED EVENTUALLY.

Inspection

THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC WHO PERFORMED AN ON-SCREEN DRIVING TEST, BUT WAS UNABLE TO FIND THE FAILURE CODES.

Repair

THE FAILURE WAS NOT REPAIRED.

Outcome

Not stated

Why selected：The trim (Denali) is not stated.

This warranty administration bulletin provides information on the change in automatic transmission add conditions documentation and claim submissions

Communication summary

This warranty administration bulletin provides information on the change in automatic transmission add conditions documentation and claim submissions

Why selected：The source's vehicle field includes the trim.

This Preliminary Information communication provides information to the technician on the steps to diagnose and repair 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.

Communication summary

This Preliminary Information communication provides information to the technician on the steps to diagnose and repair 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.

Why selected：The source's vehicle field includes the trim.

This Preliminary Information communication provides information to the technician about vehicles that have a Service 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.

Communication summary

This Preliminary Information communication provides information to the technician about vehicles that have a Service 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.

Why selected：The source's vehicle field includes the trim.

This Preliminary Information communication provides information to the technician about vehicles that may have a planetary gear whine noise in first and second gear. Technician should compare the noise to a like vehicle. Technician will need to check the build date of the transmission, if it was built after 09/01/2003 and it is determined that a vehicle has an abnormal amount of noise, perform the rear unit end play check. Technician will replace the output planetary gear set if end play is out of specification. The transmission assembly will need to be replaced if the end play is with in specification.

Communication summary

This Preliminary Information communication provides information to the technician about vehicles that may have a planetary gear whine noise in first and second gear. Technician should compare the noise to a like vehicle. Technician will need to check the build date of the transmission, if it was built after 09/01/2003 and it is determined that a vehicle has an abnormal amount of noise, perform the rear unit end play check. Technician will replace the output planetary gear set if end play is out of specification. The transmission assembly will need to be replaced if the end play is with in specification.

Why selected：The source's vehicle field includes the trim.

THE ENGINE REMAINS ON, THE SHIFTER (AUTOMATIC) HAS NOT MOVED AND INDICATES "DRIVE".

Observed

THE ENGINE REMAINS ON, THE SHIFTER (AUTOMATIC) HAS NOT MOVED AND INDICATES "DRIVE".

Inspection

Not stated

Repair

Not stated

Outcome

Not stated

Why selected：The source's vehicle field says Yukon; whether it is an XL is not stated.

THE CONTACT STATED THAT WHILE DRIVING APPROXIMATELY 30 MPH, THE BRAKE PEDAL TRAVELED TO THE FLOORBOARD ABNORMALLY UPON ENGAGING. THE VEHICLE FAILED TO DECELERATE UNTIL AFTER THE GEAR LEVER WAS SHIFTED INTO NEUTRAL. THE CONTACT ALSO NOTICED BRAKE FLUID LEAKING ON THE GROUND.

Observed

THE CONTACT STATED THAT WHILE DRIVING APPROXIMATELY 30 MPH, THE BRAKE PEDAL TRAVELED TO THE FLOORBOARD ABNORMALLY UPON ENGAGING. THE VEHICLE FAILED TO DECELERATE UNTIL AFTER THE GEAR LEVER WAS SHIFTED INTO NEUTRAL. THE CONTACT ALSO NOTICED BRAKE FLUID LEAKING ON THE GROUND.

Inspection

Not stated

Repair

THE VEHICLE WAS TOWED TO AN AUTHORIZED DEALER WHERE THE DRIVER'S SIDE BRAKE LINE WAS REPLACED. IN ADDITION, THE TRANSMISSION OIL LINE WAS PREVIOUSLY REPLACED.

Outcome

Not stated

Why selected：The source's vehicle field includes the trim.

MY VEHICLE WAS NOT RUNNING THE KEYS WERE IN THE VEHICLE THE RADIO WAS PLAYING, I WAS STANDING 3 FEET FROM THE VEHICLE WITH MY BACK TO IT. I HEARD THE TRANSMISSION SHIFT.

Observed

MY VEHICLE WAS NOT RUNNING THE KEYS WERE IN THE VEHICLE THE RADIO WAS PLAYING, I WAS STANDING 3 FEET FROM THE VEHICLE WITH MY BACK TO IT. I HEARD THE TRANSMISSION SHIFT.

Inspection

THE SERVICE WRITER AND MECHANIC CHECKED A FEW OTHER VEHICLE AROUND THE SHOP AND FOUND THIS TO WORK ON EVERYONE THEY TRIED.

Repair

Not stated

Outcome

Not stated

Why selected：The source's vehicle field says Yukon; whether it is an XL is not stated. The trim (Denali) is not stated.

ONE OF THE OWNERS OF THE CAR WAS DRIVING IT TO WORK WHEN THE CAR STOPPED PULLING AND WOULD NOT SHIFT GEARS. BEFORE THIS HAPPENED, ON A FEW OCCASIONS THE CAR HAD TO GET A JUMP FROM ANOTHER CAR TO START. LAST, THE LIGHTER DID NOT WORK.

Observed

ONE OF THE OWNERS OF THE CAR WAS DRIVING IT TO WORK WHEN THE CAR STOPPED PULLING AND WOULD NOT SHIFT GEARS. BEFORE THIS HAPPENED, ON A FEW OCCASIONS THE CAR HAD TO GET A JUMP FROM ANOTHER CAR TO START. LAST, THE LIGHTER DID NOT WORK.

Inspection

Not stated

Repair

Not stated

Outcome

Not stated

Why selected：The source's vehicle field says Yukon; whether it is an XL is not stated.