GMC Complaints

Unknown, The vehicle will begin to jerk or shake when it gets up to about 30 - 40mph then levels out. Sometimes it will repeat the jerking when traveling at speed of 50 - 60mph for a few seconds then levels out. Sometimes the vehicle hesitate on take off from a stopped position.

Tailgate opened while in park.closed garage door.Came back out to leave and garage door got caught on tailgate that had released open on its own causing body damage.

My wife was driving the vehicle down a major highway in Tulsa and it immediately shut down and started slowing down. She was in the left hand lane had to cross 3 lanes of traffic with a dead engine. Luckily she wasn’t ran into because traffic was very heavy. This could have resulted in injury or even worse. She made it off the highway by about a foot and had to sit there for 30 minutes before I could get there. The vehicle had to be towed to a dealership and they just confirmed that the engine was blown. The vehicle only has 70,000 miles on it and has had regular oil changes.

Catastrophic engine failure to the GM 6.2L engine. Mechanical issue - cam or crankshaft came apart. Safety to myself and/or others as I was driving on the road in traffic when the issue occurred and had complete loss of power. I was able to avoid traffic and get the SUV to the shoulder of the road. The issue was confirmed by my auto service provider. No warning lamps or messages prior to failure. Once failure occurred, the check engine light started to blink.

The contact owns a 2019 GMC Sierra 1500. The contact stated that the vehicle was taken to the local dealer for a routine oil change. The dealer informed the contact that the oil level was low. The contact stated while driving at 25-30 MPH, the low oil pressure message was displayed. The contact pulled over and there was oil on the ground. There were no warning lights illuminated. The contact stated that the failure was related to NHTSA Action Number: PE25001 (Engine and Engine Cooling). The vehicle was towed to the local dealer again, where it was diagnosed that the engine needed to be replaced. The vehicle was not repaired. The manufacturer was not contacted. The approximate failure mileage was 127,000.

The contact owns a 2025 GMC Hummer EV. The contact stated that while the vehicle was stationary, the brake pedal was depressed, and several unknown warning lights illuminated. The contact stated that while the vehicle was idling for several minutes, several unknown warning lights illuminated. The vehicle was then taken to a dealer where it was inspected by an engineer who stated that the system was extremely sensitive, and the dealer stated there was no additional assistance that could be provided. The vehicle was not repaired. The contact stated that while driving at an undisclosed speed on another occasion, several unknown warning lights illuminated. The contact was informed the system was extremely sensitive and the issue would reoccur. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 2,300.

The contact owns a 2022 GMC Sierra 1500. The contact stated that while depressing the brake pedal, the transmission would downshift, and the vehicle was aggressively shaking while idling and while depressing the brake pedal. While driving approximately 35 - 40 MPH, the Electronic Stability Control (ESC) Service message was displayed, and the check engine warning light was illuminated. The contact was able to pull over to the side of the road, the vehicle was turned off for a while and then restarted to continue driving. The vehicle was taken to the dealer, who diagnosed that the crankshaft, bearings, and tie rods needed to be replaced due to engine failure. The engine was rebuilt and the vehicle was repaired. The manufacturer was not informed of the failure. The failure mileage was 86,636.

Power steering system fails intermittently. Power steering goes and comes back on without warning, causing the driver to oversteer the vehicle. Mechanic performed software update, which did not fix the problem and told me the power steering module needs to be replaced, which would be over $1,000 for the part, plus labor and re-alignment. Additionally, the replacement power steering module is not currently available - it is on backorder.

For about a week my engine seemed to be bogging down. I thought maybe it was bad gas purchased that week . I was traveling on [XXX] in Ky a day later as I do everyday . My state speed limit is 70 mph, suddenly my car was bucking and felt like the engine was going to stall and speed immediately went from 70mph to 20 and a huge plume of white smoke came out of the tailpipe and check engine light came on . I was terrified I could have been killed or killed somebody else. I was able to get the car to my mechanic who diagnosed it as cylinder 4 complete fail this vehichle has AFM ( active fuel management ) lifters get stuck , loss of power and engine failure. It cost me 11k for a new engine. And car rental for 1k . After doing research, I was able to find that some vehicles from 2014 to 21 including mine Cadillac GMC Chevrolet among many other vehicles with AFM active fuel management had issues GM knew about this failure and that they engines were defective during production and sold the vehicles anyways upon further investigation because GM was aware of this They were offering to replace the vehicle if it was under warranty or the engine several states Atlanta in California have lemon laws for this. Unfortunately my state does not when I call GM to request a refund since they were aware that the engines should not have been sold while they were defective. They told me because I took it to my mechanic it was out of their hands. There was nothing they can do. . This is not acceptable. They have put consumers lives at risk knowing these engines were defective and decided to sell them anyways I want to know why there was not a lemon law at the beginning and how do I go about getting my money back for the cost of this engine.. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

The contact owns a 2015 GMC Sierra 1500. The contact stated that while the vehicle was parked and occupied at the residence, the contact exited the vehicle and went inside his home; however, forty minutes later, while attempting to start the vehicle, the vehicle failed to respond as needed. The contact stated that a bystander inspected the vehicle and assumed the starter had failed. No warning light was illuminated. The vehicle was towed to the dealer, where it was diagnosed and determined that the engine needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure and suggested that the contact take the vehicle to the local dealer for assistance. The approximate failure mileage was 141,000.