GMC Complaints

While driving in traffic on a 2 lane road with small shoulders, the engine stopped, dash indicated automatic shift to neutral, restart vehicle. vehicle coasted to a stop partially blocking the lane due to lack of shoulder and size of vehicle. Turned off ignition and attempted to restart. there was a click and the dashboard/electronics all went blank/off for several seconds then came back on. Attempted this 4 times with the same results. Called GMC roadside assistance for a tow to the dealership. The vehicle could not be shifted to neutral due to not being able to start. The tow driver had to forcefully pull the vehicle onto the flatbed with the vehicle still in park. I do not know what method was used to get the vehicle off the flatbed tow truck. Vehicle was partially blocking the roadway for an hour before the tow truck arrived leaving me vulnerable to a high speed crash. And leaving the tow operator open to an accident during the 30 minute loading Upon diagnostic the dealer informed me the engine has seized/locked up. All recalls for loss of propulsion were completed at 48,711 miles on September 7, 2025 passing inspection and dealer performing an oil change to 0W40 oil. Engine failure was 3429 miles after the recall was performed with 52,140 miles. There was no warning or difference in driving characteristics prior to failure. There was not a loss of oil pressure prior to failure according to dash gauges.

My engine has metal flake in it and once which is a sign of engine failure. I reported it to GM they said it was a normal amount and to keep an eye on it the next day toil change. They issued a recall on the 6.2L motors and they have not on the 5.3L motors and this one is doing the same thing. I want to get ahead of the ball before my engine give out on the highway but GM is treating it like it’s not a big deal.

My complaint does not involve an accident. The brakes on the 2024 Acadia Elevation are squealing very loudly, and have been doing so for the past six months or so. I have approximately 18,000 miles on it. I took my vehicle to the dealership twice for this issue, and I was told this time that the brakes are still good (still 8mm of pads) - even though it was showing 22% brake pad. They told me about the malfunctioning sensor and they fixed that, but the squealing is still there. I was told that it was the metal composition of the brake pads that is making that noise, and GM does not cover brakes past 7,500 miles (this 7,500 warranty is pointless because who would need brakes replaced in that short time frame, anyway?). That means I would have to pay out of pocket for the brakes! There is clearly something wrong with the structure of the brakes and I see on the Acadia forum that this is a common complaint. If the brakes are good, then why are the brakes squealing? Why am I being told that I just have to deal with the squealing sound? What can be done about this issue. It seems unfair to me that I have to come out of pocket to fix something that should not be "broken".

My vehicle experienced complete engine loss while driving due to a crankshaft failure. There were no warning lights, no messages, and no indication of a problem. The vehicle suddenly lost all power in traffic and then the engine seized completely. This is extremely dangerous and could easily cause a crash. The dealership confirmed this is part of the known national crankshaft defect, but the replacement engine is on backorder for over a month, leaving me with an unsafe and unreliable vehicle. GM has replaced or attempted to replace the motor multiple times, and the defect continues. This truck should not be on the road. I am reporting this because it is a serious safety hazard to me and other drivers. A vehicle losing all power with no warning is a life-threatening defect

The contact is an attorney who was representing a client who owns a 2010 GMC Sierra 1500. The contact stated that while the vehicle was being driven at an intersection, the front end of the vehicle crashed into the side of another vehicle, where it came to a stop. The contact stated that the passenger side dash air bag ruptured, related to a Takata Inflator. The driver's side air bag deployed as well. The vehicle speed was undisclosed. The vehicle was towed to an impound lot. A police report was filed. Both the driver and passenger were injured in the accident. The injuries sustained were lacerations to the passenger's leg and hearing trauma to both the driver and passenger. It was unknown if the occupants of the other vehicle were injured. The dealer was not notified of the failure. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was unavailable.

The plastic piece above the front grill detached and flew off the truck. I’m not sure the name of the part.

Loss of power while driving on highway, would not speed up. Shaky driving. Appeared to go into limp mode. Dealer informed me that the transmission valve body will need to be replaced. No prior messages or alerts, check engine light came on after power loss.

The contact owns a 2025 GMC Acadia. The contact stated that while driving 70 MPH, the sunlight reflecting off the dashboard chrome onto the windshield was blinding, forcing the driver to use a cardboard to protect their eyes. The contact stated that the failure had been recurring while driving. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The manufacturer was notified of the failure via an online chat. The failure mileage was approximately 10.

While driving at high way speeds the radio volume went to maximum high. I was unable to turn the volume down by any inputs. Mute was inoperative. Volume controls were overridden by the glitch. My hearing has been affected as well as the infant that was in the back seat. This is a serious condition that has now happened 4 times. No assistance from General Motors. My ears have been ringing for 3 straight days now. This issue had happened since I bought the truck new in 2022.

The contact owns a 2020 GMC Yukon XL. The contact stated that while driving 70 MPH and attempting a lane change, the vehicle failed to accelerate as intended. The contact pulled over to the shoulder and restarted the vehicle, but the vehicle struggled to restart and failed to accelerate as needed. The vehicle was driven to the residence at a reduced speed. The contact referenced NHTSA Campaign Number: 25V274000 (ENGINE AND ENGINE COOLING); however, the VIN was not included in the recall repair. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 70,000.