Automatic Transmission Problems of GMC Sierra 1500

The contact owns a 2024 GMC Sierra 1500. The contact stated that while attempting to reverse out of a parking space, the transmission failed to respond while in reverse. Additionally, the vehicle operated in limp mode. The vehicle was driven in limp mode to the nearest dealer, who diagnosed the vehicle and determined that the transmission valve body was faulty and needed to be replaced. The transmission valve body was replaced. The vehicle was towed back to the residence from out of state. The manufacturer was notified of the failure. The failure mileage was 6,400.

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See attached document for complaint.

The contact owns a 2022 GMC sierra. The contact stated that while attempting to park their vehicle inside of a parking lot, the contact had attempted to shift the vehicles gear into park however the shift handle broke off, and the vehicle remained in drive. The contact stated that they restarted their vehicle and that on the display a message appeared stating "vehicle in gear", however the vehicle remained in drive with the wheels locked up. The vehicle had to be towed to a local dealer where the vehicle was diagnosed. The contact was advised that the shifter cable was stuck by the transmission and that the contact would have to replace the shifter handle. The vehicle was not repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 35,000.

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The contact owns a 2018 GMC sierra. The contact stated that while driving at 70 mph, the vehicle began to shake violently, prompting him to pull to the shoulder of the roadway. The vehicle returned to normal functionality, but upon the contact continuing on to his destination, the failure reoccurred. The contact stated that the rpm's rapidly increased and the temperature gauge began to indicate that the vehicle was overheating. No warning lights were illuminated. The vehicle was taken to an independent mechanic, who diagnosed a failure with the auxiliary transmission oil cooler line, resulting in damage to the transmission. The contact was informed that the transmission needed to be replaced. The vehicle was not repaired. After investigating the failure, the contact related the failure to special coverage adjustment n182188930. The manufacturer was notified of the failure and referred the contact to the NHTSA hotline for assistance. The failure mileage was 131,000.

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The contact owns a 2018 GMC sierra. The contact stated while driving 50 mph the contact felt the vehicle shaking hard without any warning. The vehicle was not diagnosed. The vehicle was taken to the dealer, and they stated that they may needed to flash the transmission oil. The vehicle was not repaired. The manufacturer was not contacted. The failure mileage was 71,000.

The contact owns a 2022 GMC Sierra 1500. The contact stated after purchasing the vehicle and leaving the local dealer, he heard an abnormal noise and the check engine warning light was illuminated. The contact drove the vehicle back to the local dealer, where it was diagnosed with needing the transmission to be replaced. The vehicle was not repaired. The manufacturer had been informed of the failure. The failure mileage was approximately 170.

The contact owns a 2019 GMC sierra. The contact stated while driving approximately 5 mph as the vehicle was placed into "drive" the transmission, would hesitate and would not slip into gear. The contact stated that when the "drive" engaged, the shift was very hard and shook the vehicle, which then lunged forward. The contact stated that the "check engine" warning light was illuminated. The contact had taken the vehicle to a local dealer, where it was diagnosed and determined that there was no transmission failure. The vehicle was not repaired. The contact stated that the transmission failure is recurring. The manufacturer had not been informed of the failure. The failure mileage was approximately 7,000.

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The contact owns a 2017 GMC Sierra 1500. The contact stated that while driving at various speeds, the vehicle would hesitate and jerk upon acceleration without warning. The contact also stated that while driving at an unknown speed, the vehicle stalled with the check engine warning light illuminated on the instrument panel. The contact had taken the vehicle to a dealer and was informed that there was a service bulletin that was linked to the failure. Moisture could enter the vehicle through the headlights and cause the electrical and transmission failures the contact was experiencing. The contact was given an estimate for the repair. The contact then called tameron Buick GMC (27161 us-98, daphne, al 36526) and it was stated that they were unaware of such a failure. The manufacturer had yet to be notified of the failure. The failure mileage was approximately 12,000.

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The contact owns a 2011 GMC Sierra 1500. The contact was driving up an incline approximately 5 mph and plowing snow in a residential driveway. When the contact shifted into reverse, the vehicle began to roll forward and the engine stalled. The vehicle came to a stop after the contact applied the brakes repeatedly. The contact stated that the failure would also occur when driving forward on an incline. The vehicle was taken to a dealer where the technician performed a road test and informed the contact that the vehicle was operating as designed. The vehicle was not repaired. The failure mileage was approximately 800.

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The contact owns 2011 GMC Sierra 1500. The contact was driving 50 mph when the vehicle hesitated and was slow to accelerate. The vehicle was taken to the dealer and they advised that there were no failures and the vehicle was operating as designed. The vehicle was not repaired. The failure and current mileage was 1,500 updated 02/23/11 the consumer stated the vehicle would hesitate on acceleration. Whenever he attempted to accelerate, the engine would lag behind for a split second. When the engine did engage, the drive train would bang from the engine accelerating. The consumer also stated the vehicle would not hold in steady speed high gear. The transmission would continually go between 5th and 6th gear. When in 6th gear, the vehicle would lose speed. Updated 05/05/11.

On November 18, 2010, returning from vacation, driving a new 2011 GMC sierra sle pick up with less than 2,000 miles use, pulling a 24' travel trailer. The truck was in "tow" mode descending a 15% grade hill at approximately 45 mph. I was not accelerating when the truck down shifted itself automatically from 5th to 3rd gear and the engine accelerated to 4000 rpm. I applied brakes and truck shifted back to 5th gear. Fortunately conditions were dry and no accident occurred. Cruise control was not engaged at the time as terrain was very hilly and twisting. Truck shifted and accelerated without warning. Continued trip without further problems.

Loss of 3rd gear. Tries to shift into 3rd gear and just red line's.

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While driving through a stop light I heard and felt a metallic bang. The transmission dropped into 1st gear and wouldn't shift up. I lost reverse too.

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The contact owns a 2005 GMC Sierra 1500. When the vehicle is shifted into fifth gear, the fan stops blowing. When switching back to fourth gear, the fan will blow. The failure began in December of 2007. In August of 2008, the wiring plug and resistor melted. The wiring plug was replaced; however, the metal connector is defective and will not allow the plug to properly connect. As a result, the vehicle can only be driven in third gear. The dealer stated that they needed to diagnose the vehicle. The failure mileage was 34,100 and current mileage was 37,000.

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Gm technical bulletin 00-07-30-022c (automatic transmission) failure of reaction sun gear with only 36,xxx miles (2002 GMC Sierra 1500 4. 8l). This appears to have been a problem for at least a decade with continual failures until gm upgraded the defective components in 2003. Repair estimates could be over $2,000. Cash available = $200. Gm should take responsibility for known defective parts.

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Steering column clunking, speedometer not working, transmission stopped working . Everything started going wrong about. 63,000 k . I have 116,000 know. 2004 z71 crewcab.

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: the contact stated while the vehicle was parked with the key in the ignition accessory mode, an unattended child switched the column gear shift from park to drive and the vehicle rolled downhill crashing into a tree. Minor injuries were sustained. There was extensive damage to the front of the vehicle. The police were alerted and a report was taken. The vehicle was taken to a body shop for the body damage. The manufacturer was not alerted. Updated 10/4/2006 -.

1997 GMC sierra does not decelerate when the accelerator is released. Braking and/or downshifting only increased the rpm. Transmission can be put into neutral then back in the desired gear and the vehicle will then slow down slightly. Service dealer claimed no problem found.

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When driving at any speed vehicle jerked. Consumer took the vehicle to the dealership for inspection, and mechanic determined that transmisson failed.

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Transmission shop stated he has seen many failures with this model. Keeps new parts in stock and ready for more to come.

I have heard of other incidents where this part failed. If this part had failed at high speed this could have resulted serious damage and possible injury.

When driving at any speed and shifting vehicle from first to second gear, the vehicle is shifting very hard due to a faulty valve within the transmission.

The contact owns a 1995 n/a GMC Sierra 1500. The contact stated that after parking, turning the vehicle off, and exiting, the vehicle suddenly rolled forward, down a slight incline, and crashed into another parked vehicle. The cause of the failure was not determined. The manufacturer and local dealer were not contacted regarding the failure. In addition, while making a left turn into an intersection, a second vehicle crashed into the front of the vehicle. During the crash, no air bags deployed. The contact sustained injuries to both the shoulder and the chest. No medical treatment was required. A police report was filed at the scene. The cause of the failure was not determined. No further information was available. The VIN was not available. The failure mileage was 4,000.

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No summary listed for above vehicle.