GMC Complaints

I took my vehicle to a dealer to repair something unrelated to the engine. They said the oil pan was leaking and pulled the pan to discover the crank shaft bearings were failing. The vehicle has 53,765 miles at this point. This appears to be the same defect being recalled on the 2022 through 2024 models.

Had my oil changed Wednesday and noticed a new noise. Brought to dealership, this particular year is known for 6.2 L engine failure but was told mine wasn’t in the recall. Well I was told today I have engine issues and they are replacing

Severe transmission shuttering destroyed my transmission and I need a new one according to a local body shop and a GMC service center. This is a KNOWN issue with these 10 speed transmissions, but they will not recall the ones from this year, they only recalled newer models. Car has been inspected by a local autobody shop, a 3rd party warranty company, and a GMC dealership service center. Shuddering causes severe shaking while driving between 25-65mph. No lights or other symptoms, just started occurring randomly. Purchased car Feb 2025, brought it in to local auto shop November 2025 and they could not get a transmission for months. They stated one was set to be delivered by GMC Feb 6th 2026 and they day before arrival GMC called them saying it was back on back order. Called the dealership in April 2026 and they stated they were not backordered. Had vehicle transferred to dealership service center and they say it’s still on national back order with no ETA. I have been waiting for over 6 MONTHS for a new transmission. This car has been undrivable for almost longer than I have been actually able to drive it.

I am filing this complaint regarding my GMC Yukon Denali, currently at Greg Lair GMC in Canyon, Texas, for GM Safety Recall N252494000, NHTSA Campaign Number 25V274, L87 Engine Loss of Propulsion. My vehicle has been at the dealership for over two weeks for this recall, which in my case requires a complete engine replacement. I have been advised the repair may take another 4 to 5 weeks. During this time, neither General Motors nor Greg Lair GMC has provided a comparable loaner vehicle or adequate transportation. This is not routine maintenance, elective service, or damage caused by me. My vehicle is unavailable because of a GM safety recall involving potential engine damage, engine failure, and loss of propulsion. The burden of this manufacturer issue should not be placed on the customer. I was told GM only can reimburse $44 per day for a rental. That amount does not reasonably cover a comparable vehicle to a Yukon Denali and may not even cover a basic rental in the current market. A compact sedan or small vehicle is not an acceptable substitute for a full size SUV. I pay for and rely on a Yukon Denali because my family needs the seating capacity, space, size, safety, and functionality of a full size vehicle. My family has more people than seats available in many compact vehicles. Being forced into a smaller vehicle is not only inconvenient, it creates a safety and functionality concern. If this recall is widespread and repair times are expected to take several weeks, General Motors should have ensured that dealerships had access to comparable loaner vehicles or adequate rental authorization. I should not have to compromise my family’s safety, transportation needs, work obligations, or daily responsibilities because of a manufacturer safety recall and complete engine replacement. I am requesting that this complaint be documented and reviewed. General Motors and Greg Lair GMC should provide a comparable full size SUV loaner, arrange and pay for a full size SUV

6.2L V8 engine. 2020 build, GMC Sierra 1500 series. Same engine in the existing recall for 2021-2024 models. Received a call from the service department of the dealership that after changing the oil and restarting the truck to reset the oil change indicator the engine shut down. Assistant service manager, Stephen Poulson [XXX] ) called and provided information that the engine seized and that the technician cannot manually forward or reverse the engine with a breaker bar. According to the technician, this is indicative of a catastrophic failure consistent with the existing recall. The vehicle is currently at Carr Vancouver Buick GMC and is available for inspection. NHTSA has permission of this owner to inspect this vehicle involved if they choose. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

I was driving and noticed a very strong smell of an electrical fire. The truck popped up a High Voltage Battery warning and several warning lights came on. We stopped, restarted the truck and the lights came on again, the smell returned as soon as we started driving. We drove the truck to Cable Dahmer GMC in Kansas City, MO. Service advisor Kracinda asked us to exit the vehicle as quickly as possible as it needed to be moved away from the building ASAP. It was parked several blocks from the building in a col de sac away from all vehicles. The electrical fire smell was very strong. The manufacturer is now saying that a software update is all that is required.

The contact owns a 2019 GMC Sierra. The contact stated that while driving at 20 MPH, the check engine light began to flash. The driver pulled over. The vehicle was knocking. The contact stated that failure was due to premature engine failure. The vehicle was towed to the local dealer, where it was diagnosed with a cylinder 3 lifter malfunction. The vehicle had misfired. The vehicle was not repaired. The manufacturer was notified, but no assistance was provided. The failure mileage was approximately 77,000.

1 month after warranty was up the dash light came on. After researching and speaking with the dealers. Pull the F11 fuse then try un hooking the negative battery terminal. This worked for a few weeks. Then told it could be a software issue. I spent many hours search the internet only to find out there are thousands of trucks dealing with the same issue. Why is there a recall on a grill and not this issue? Lots of very unhappy GMC truck owners!!!

The vehicle drove normally earlier in the day with no major drivability concerns. Later, reverse gear suddenly stopped functioning and the engine would rev abnormally without the vehicle moving properly while in reverse. Shortly afterward, while driving, the vehicle displayed the warning message “Reduce Acceleration – Drive with Care” and began losing acceleration and propulsion. The vehicle would not accelerate normally and later could not exceed approximately 20-35 MPH. The condition created a significant safety concern due to sudden loss of acceleration and propulsion while operating in traffic. The engine RPM would increase abnormally while the vehicle failed to respond properly in drive and reverse. An independent mechanic inspected the transmission and found diagnostic trouble codes P0747, P0776, and P0700 related to transmission pressure control and valve body operation. Inspection also revealed significant metal contamination, sludge, and clutch material inside the transmission pan and filter. Reverse and 2nd gear were determined to be failed/burnt internally. The vehicle was later transported to an authorized GMC dealer for inspection. Dealer confirmed reverse gear would not engage even after adding transmission fluid. Vehicle is currently available for inspection.

The contact owns a 2020 GMC Terrain. The contact stated while the vehicle was parked, the contact noticed that the tire well was filled with water. The contact stated that the unknown box on the side was filled with water. In addition, the contact stated that the water dripped onto the ground underneath the rear tire. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The manufacturer was not made aware of the failure. The failure mileage was approximately 70,000.