What 106 owners told NHTSA about the 2011 GMC Sierra 2500 Hd

On or about [XXX], the Transmission Control Module, FAILED, on my 2011GMC Denali 2500 6.6 diesel. It was a KNOWN faulty part .General Motors was aware of the issue years ago. This part should have been deemed a Safety Recall item. Imagine, pulling a trailer down a busy Freeway, with Semi's presence. Module goes out, truck goes idle, people hurt or worse. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ODI 11544893

When vehicle is warm and shut off, upon restart it will not go in to any gear, there was no warning lamps. An independent repair facility determined the Transmission Control Module was defective. General Motors has no parts available, and I know fro a fact it is a rather large issue.

NHTSA ODI 11542446

TCM failed. Couldn’t find the parts required. Truck sat 700 miles away from me for four weeks. Had to have part repaired in hopes it worked. As of now I still have some issues but would not have the truck at all if I had to wait for a part

NHTSA ODI 11542474

Transmission control module put my truck in limp mode while drinking down the highway.

NHTSA ODI 11517195

The contact owns a 2011 GMC Sierra 2500. The contact stated that while starting the vehicle, the vehicle remained in the PARK and failed to shift into DRIVE. The steering wheel was locked preventing the gear shifter from going into gear. The traction control warning light was flashing. The vehicle was taken to the local dealer but, was not diagnosed or repaired. The manufacturer was not contacted. The approximate failure mileage was 190,000. The VIN was not available.

NHTSA ODI 11448969

VEHICLE WAS EXHIBITING HARSH SHIFTING; UPSHIFTS/DOWNSHIFTS. PULLING INTO DRIVEWAY FROM RURAL HIGHWAY VEHICLE DOWNSHIFTED AND PASSENGER WAS THROWN FORWARD AND ALMOST HIT THE DASH WITH HER HEAD, FELT LIKE IT WAS SHIFTING INTO PARK. HAD VEHICLE TOWED TO DEALERSHIP. VEHICLE WOULD NOT SHIFT INTO ANY GEAR FOR MECHANIC. TRANSMISSION REPAIRED ALONG WITH A WIRING HARNESS THAT PREVENTED THE MAIN COMPUTER TO COMMUNICATE WITH THE TRANSMISSION. REPORTING THIS BECAUSE THIS IS DANGEROUS IF THIS WIRING HARNESS FAILS AS WE COULD BE OUT IN THE MIDDLE OF NOWHERE WITH A VEHICLE THAT WILL NOT DRIVE. ATTACHING INVOICE OF REPAIRS THAT SHOW WHAT PARTS WERE REPLACED BY THE DEALER.

NHTSA ODI 10916670

FIRST OFF WOULD BE MY DASHBOARD AIR BAG, THE DASHBOARD PLASTIC IS CRACKING WITH THE CONCERN ON FLYING DEBRIS I BROUGHT MY GMC 1500 INTO MY LOCAL SERVICE/SALES CENTER AND HE TOLD ME WITH OUT A RECALL THERE IS NOTHING HE COULD DO FOR ME. SECOND I HAVE BEEN DEALING WITH WHAT SEEMS TO EITHER THE POWER TRAIN OR BRAKES FROM DAY ONE I PURCHASED MY TRUCK. WHAT IT DOES IS WHEN I COME TO A COMPLETE STOP, RELEASE THE BRAKE, AND THEN APPLY THE ACCELERATOR I GET A BIG CUR PLUNK SOUND AND FEELING OF THE TRUCK JERK. THIS IS COMING FOR THE REAR END OF MY TRUCK I WOULD ASSUME THE REAR AXIAL. I HAVE BROUGHT THIS UP TO MY LOCAL SERVICE/SALES CENTER , MULTIPLE TIMES. HE HAS NOT STOPPED THE PROBLEM AND TELLS ME THERE IS NOT MUCH MORE HE CAN DO WITHOUT THE MANUFACTURER POSTING A BULLETIN OUT.

NHTSA ODI 10746296

IN VERY COLD WEATHER, THE SHIFTER STICKS AND WILL NOT MOVE TO SHIFT IN ANY GEAR. *JS

NHTSA ODI 10681664

ENGINE LIGHT SYMBOL MESSAGE APPEARED ON VEHICLE DURING THE EARLY PART OF SEPTEMBER. (NOT QUITE SURE OF THE DATE). DEALERSHIP INDICATED THAT THE WORK WAS COVERED UNDER WARRANTY AND WILL REQUIRE A FULL DAY TO REPLACE PARTS. AFTER REPAIR THE VEHICLE SEEM TO OPERATE EXCELLENTLY UNTIL THE MIDDLE PART OF OCTOBER. ENGINE LIGHT MESSAGE APPEARED AGAIN ON VEHICLE. AT THIS TIME THE SERVICE MANAGER IDENTIFIED THE PROBLEM AS A SENSOR OVERHEATING. NEEDED TO BRING VEHICLE BACK WHEN DIESEL MECHANIC IS ON DUTY. REQUESTED ADVICE FOR TRAVEL. SERVICE MANAGER CLEARED CODE. ENGINE LIGHT MESSAGE CAME ON AGAIN IN MINUTES. THE NEXT DAY WHILE TRAVELING ENGINE LOST OF POWER MESSAGE CAME ON WITHIN 150 MILES FROM WHERE WE DEPARTED. BEFORE LOST OF POWER A MESSAGE OF LOW IN EXHAUST FLUID FLASHED ON AND OFF. PULLED TO THE SIDE OF THE ROAD AND TURNED ENGINE OFF FOR ABOUT 30 MINUTES. RESTARTED VEHICLE AND THE VEHICLE DROVE WELL TO OUR DESTINATION OF 248 MILES MORE. CARRIED VEHICLE TO A GMC DEALERSHIP. THE DEALERSHIP IDENTIFIED THE FOLLOWING CODES: P113A-EGR TEMP 3-4 CORRELATION; P2471-EGR TEMP SENSOR 4 HIGH VOLTAGE; P20CC-EXHAUST FUEL INJECTOR PERFORMANCE HISTORY. DEALER STATED REPAIR COULD NOT BE ADDRESS DUE TO OTHER SCHEDULED APPOINTMENTS FOR A WEEK. DEALERSHIP MECHANIC CLEARED CODES. ENGINE SYMBOL RETURNED IN 25 MINUTES. WHILE RETURNING BACK HOME THE VEHICLE AGAIN GAVE THE MESSAGE LOW IN EXHAUST FLUID AND WITHIN MINUTES WENT INTO LOST OF POWER MODE. SCHEDULED APPOINTMENT WITH THE DEALERSHIP AGAIN TO RESOLVE THE PROBLEM. *TR

NHTSA ODI 10649976

GM PERFORMED A RECALL FOR FRACTURED TRANSMISSION DIPSTICK TUBE ON MY TRUCK. THEY TOOK A TUBE OF FOAM AND PLASTIC STRAPPED IT TO THE TUBE. I NEVER SAW THE REASONING! THE TUBE HAS FRACTURED AND NOW HAS TO BE REPLACED. WHY DID THE NOT FIX THIS PROPER IN THE FIRST PLACE. NOW I NEED TO MAKE TWO MORE APPOINTMENTS TO GET THIS FIXED. MY TRANSMISSION IS OPEN TO THE ELEMENTS, WATER AND DIRT! *TR

NHTSA ODI 10638841

AFTER APPLYING BRAKE TO SLOW DOWN TO < 5 MPH (NOT COMING TO A HALT) AND THEN TRYING TO ACCELERATE, VEHICLE BECOMES UNRESPONSIVE FOR 1 TO 2 SECONDS; IT FEELS LIKE THE TRANSMISSION GOES INTO NEUTRAL DURING THE BRAKING PERIOD AND WHEN GAS PEDAL IS APPLIED, THERE IS A 1 - 2 SECOND TIME PERIOD WHERE VEHICLE IS TRYING TO FIGURE OUT SOMETHING AND PREVENTS ANY ACCELERATION. WHY IS THIS DANGEROUS? I FOUND MYSELF IN A LEFT TURN ONLY LANE/GREEN LIGHT WITH OPPOSING TRAFFIC, AND I ATTEMPTED THE LEFT TURN WITH ONCOMING TRAFFIC BECAUSE I THOUGHT THAT I HAD AMPLE TIME BUT THE VEHICLE JUST SAT THERE FOR 1 - 2 SECONDS, AND WITH THAT I FOUND MYSELF IN A DANGEROUS PREDICAMENT BECAUSE THE ONCOMING TRAFFIC WAS GETTING VERY CLOSE. IF THE VEHICLE HAD RESPONDED WHEN I NEEDED IT TO, IT WOULD NOT HAVE BEEN A CLOSE CALL. THIS BEHAVIOR WITH THE VEHICLE CAN BE REPRODUCED AT WILL, EVERY TIME. THERE ARE MANY FORUMS ON THE INTERNET WHERE MANY PEOPLE ARE COMPLAINING ABOUT THIS SAME ISSUE WITH THE DRIVE-TRAIN, GMC KNOWS ABOUT IT, BUT REFUSES TO DO ANYTHING ABOUT IT. *TR

NHTSA ODI 10598600

TL* THE CONTACT OWNS A 2011 GMC SIERRA. THE CONTACT STATED THAT THE VEHICLE WAS PARKED IN A RESIDENTIAL DRIVEWAY WHEN IT ROLLED AWAY IN REVERSE AND INTO THE STREET. A CRASH DID NOT OCCUR. THE VEHICLE WAS TAKEN TO THE DEALER FOR INSPECTION BUT THEY WERE UNABLE TO DIAGNOSE THE CAUSE OF THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOTIFIED AND DID NOT PROVIDE ANY ASSISTANCE. THE FAILURE MILEAGE WAS 28,000. UPDATED 02-08/13 *BF UPDATED 02/11/13

NHTSA ODI 10493059