GMC Complaints

1. The electrical system and driver-assistance/safety features malfunctioned, including intermittent power loss and dashboard system failures. The vehicle is available for inspection upon request. 2. The malfunction caused the vehicle to lose power to the braking system while driving, which created a risk of collision. Essential safety features such as power steering, brakes, and warning systems were impacted, putting both myself and other drivers at risk. 3. Yes. The issue has been reproduced and documented by the dealership during multiple service visits and reported to GM customer service. However, the safety claim was denied by GM and I have been advised to continue to drive this unsafe vehicle. 4. The vehicle has been inspected by the authorized dealership and GMC technicians. It has not been inspected by police or insurance representatives at this time. 5. Yes. Warning messages appeared on the dashboard, including system errors and power failure alerts. These issues first appeared around 20,000 miles, and have recurred intermittently since then. I have communicated with the dealership where the car was purchased and GM corporate requesting replacement with a safe and reliable vehicle. To date, I have not received a satisfactory resolution. I have researched and found that other 2024–2025 GMC Acadia owners are experiencing the same issue. This vehicle is unsafe to operate until GM identifies and resolves the defect. Losing control of the brakes constitutes a catastrophic safety failure that makes this vehicle unfit for road use. Immediate investigation and corrective action are necessary to prevent potential accidents or injuries.

Engine developed a clicking sound. Took to dealership and was diagnosed with rod and bearing damage requiring an engine replacement. Was fortunate to have inspected before engine failure while driving. No warning before the failure. I believe there is a known issue with the 6.2 L engines.

The first occurrence (post recall 21V213000 completion 8/24/2021), was Sunday 9/21/2025 . I was just accelerating after a stop sign turning left and I lost power steering and stabilitrak. Yes it is available for inspection if requested. I was at risk of being in an accident. No it has not been confirmed by a dealer or independent service. No it has not been inspected by manufacturer, police, insurance reps or others. No there were no warning lights, messages or other symptoms prior to the failure. They first appeared as the failure was occurring. The second occurrence occurred on Sunday 10/5/2025. I was on a straight away part of the road when the power steering, stabilitrak failure occurred again just before I was slowing down to turn right into a parking lot. Yes it is available for inspection if requested. I was at risk of being in an accident. No it has not been confirmed by a dealer or independent service. No it has not been inspected by manufacturer, police, insurance reps or others. No there were no warning lights, messages or other symptoms prior to the failure. They first appeared as the failure was occurring.

The contact owns a 2022 GMC Sierra 1500. The contact stated that while driving approximately 80 MPH, the vehicle suddenly lost power, the engine began knocking, and the vehicle began to decelerate quickly until there was complete engine failure. The contact was able to coast to the emergency lane on the side of the highway. After the failure, several unknown warning lights illuminated on the instrument panel. The vehicle was towed to the dealer, who diagnosed the vehicle with engine failure. The vehicle was included in NHTSA Campaign Number: 25V274000 (Engine and Engine Cooling). The contact stated that the engine was replaced. However, with less than 3,000 miles on the new engine, the knocking sound reoccurred while starting the vehicle and while the vehicle was idling. No warning lights were illuminated. The vehicle was returned to the dealer, who diagnosed the vehicle with engine failure and determined that the engine needed to be repaired, but confirmed that an engine replacement was not covered under warranty or recall. The manufacturer was informed of the first failure; however, they were not informed of the latest failure. The failure mileage was approximately 117,457.

My Acadia has the shift to park default it has been fixed 3 times and now it is popping up again for the 4th time which means I can't turn my vehicle off it takes forever to get it to go off please help please help

Engine check light on, Code P0302 cylinder 2 misfire. loud mortar ticking, car makes abrupt jump/move forward.

When putting the truck in reverse it did not go, then suddenly squealed the tires and engaged reverse. This happened 2 days in a row. On the 3rd day, it would not go into reverse at all and had to be pushed in neutral from a parking space to be able to drive forward. At that time, it was at first jerky but did go forward. Subsequently, I did not drive it until my appointment with the dealership and I was able to put it in reverse.

GM has identified my vehicle as having a problem "If the engine fails during vehicle operation, the vehicle will lose propulsion, increasing the risk of a crash.". It has been almost 6 months since this issue was identified and yet GM has failed to address the issue in my vehicle. I believe this problem should be immediately corrected and if it results in my or my families injory GMC should be considered grossly negligent for their failure to promptly correct the issue.

Push rod failure in #4 cylinder at 104,000 miles. Bent push rod. Possibly due to AFM.

The engine lost all power while driving down the road and code says p0016 Truck is now at a GMC service station being torn down