GMC Complaints

Loss of power steering. Loss of engine propulsion at high rates of speed. Engine would not start.

My vehicle was a well maintained 2018 GMC Sierra 1500. It has 58000 miles. I was driving in 30 mph zone thank God. Heard a loud boom and the truck lost power and shut off. I got out and oil was pouring out. I took it to the GMC dealership and they told me the engine failed. They didn’t know why or what caused the failure. But said they is a hole in the block and all they can say is something in the engine failed.

I had a 2019 GMC Sierra with a 6.2L gas engine. The engine failed while I was driving on the highway at 65 mph. The truck began shaking badly, check engine light and all kinds of warning lights came on. I pulled over and drove slowly 10 miles to a GM dealer who then told me that I should not be driving the truck due to safety concerns and it could lose power and lead to an accident. I had it towed back to my home town ($500 later) to the GMC dealer where I purchased the truck. They told me the same thing, it could not be driven. GM has since recalled vehicles with this same 6.2L engine manufactured in model years 2021-2024. I believe that recall should have included my 2019 truck. I was at risk of serious injury or death due to engine failure, fortunately I did not crash. However, I lost $14,000 in value of the truck thanks to the faulty engine. I believe the recall should be expanded and I should be compensated by GM for the engine failure. I have attached the estimate for the repair.

SUV appears to get stuck in gear or struggle shifting causing jerky behavior and erratic drivability. Stopped driving and had it towed to dealer. Dealer stated Engine Code P0747 shown. Dealer stated faulty transmission valve body but no ETA on parts. Told to keep driving unless condition gets worse. Vehicle is less than 2 years old and 20,000 miles. Check engine light goes on and off relating to the same condition and sometimes having shift issues.

The contact owns a 2014 GMC Sierra 1500. The contact stated that while her husband was driving at various speeds, the front headlights failed to function as intended. The contact stated that the headlights were dim and foggy. The failure limited the driver's visibility, preventing the driver from safely operating the vehicle. There were no warning lights illuminated. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure recurred, and the contact was no longer driving the vehicle at night due to the safety concern. The failure mileage was unknown.

The contact owns a 2021 GMC Sierra 1500. The contact received notification of NHTSA Campaign Number: 25V274000 (Engine and Engine Cooling); however, the part to do the recall repair was unavailable. The dealer was not contacted and confirmed that parts were not yet available. The manufacturer was not made aware of the failure. The contact had not experienced a failure. VIN tool confirms parts not available.

The contact owns a 2019 GMC Yukon. The contact stated while driving 40 MPH, there was an abnormal ticking sound coming from the vehicle. There were no warning lights illuminated. The vehicle was taken to the local dealer where it was diagnosed and determined that the water pump needed to be replaced. The vehicle was repaired; however, the failure recurred. The vehicle was taken to the dealer where it was diagnosed with engine failure, and lifters and cam phaser failures. The vehicle was not repaired. The manufacturer was not contacted. The failure mileage was approximately 7,000.

The recall has been performed over a year ago. The dealership failed to update their records, our company continues to receive notices that we need to have this recall completed.

My 2022 Acadia does not go into park at times even though the control button shows that it is in park. On May 15, 2025, I pulled under my carport and put the car in park. As I reached for my purse in the passenger seat, the car started moving forward even though it was in park. It ran through my privacy fence and injured my daughter who happened to be on the other side of the fence. She had some pretty severe bruising and scrapes on her hip, thigh, and upper body. The pain is bad enough, but her arm and shoulder was injured. It continually feels like something running up and down her arm. This is three weeks later and she still has the problem. The horrifying fact is the reality that I could have killed her through no fault of my own. I had the car towed to the dealership because I was afraid to drive it. Of course, the service department said they ran a test through the electrical system and found no problem with it. They brought my car to the front and told me there was nothing wrong with it. In fact they said they had not heard of that kind of problem. When I have to park I find a parking spot that would be least likely to have someone walk in front of it. If I have to park facing anything I will not pull up fully into the parking space so if my possessed car decided to go for a joy ride while in park again, at least someone would have a running chance to stay alive. I consulted the internet trying to find a fix to the problem. What I found was that GM has had the problem for years and has no idea how to fix it, yet they are allowed to continue to sell vehicles that are a potential safety hazard to society. My vehicle is a safety hazard to me and to society. Also learned that if you take you car to the repair shop you are appeased thinking they repaired the problem and yet it continues. When your warranty runs out, GM expects you to pay for any further visits to the shop. As far as I'm concerned selling GM products could be considered A FRAUDULENT ACTIVITY!

Hi I have always taken good care of my 2020 gmc Sierra 1500 at4 6.2 Kept up with its regular and recommended maintenance. I had no warning signs on the dash. So it surprised me that while on my way to work early one morning I was getting off the highway exit and the truck lost power, my steering wheel hardened and it posed a great threat to my life and others on the road, as it suddenly decelerated in a area where people are driving at accelerated speeds. The whole truck was loosing power and shaking hard as I attempted to steer it to a safe location on the side of the road. Had a mechanic inspect it and they determined The truck ended up with a seized engine. I have since not been able to use my truck for 8 months and still currently paying monthly payments of 1000 to pay it off.