GMC Complaints

Control Valve Engine Coolant which is a well known issue with back orders taking months for the part and GMC not acknowledging responsibility and having loyal customers pay out of pocket.

Catastrophic engine failure while in motion. Clicking sounds while traveling 70 miles or more on interstate. Exited interstate and traveling 15-20 mph when vehicle came to sudden stop in roundabout. No lamps or alerts prior to failure. Vehicle would not transfer gears and was towed to Chevrolet dealership where diagnostic was completed. Engine replaced after 6 weeks but unknown if replaced engine is under recall.

The contact owns a 2021 GMC Yukon XL. The contact stated while her husband was driving at an undisclosed speed, the engine made an abnormal loud sound, and the vehicle became undrivable. The vehicle was taken to Midas, where an unknown repair was performed. Additionally, the contact stated while driving 50-55 MPH on the expressway, the vehicle shuddered significantly, and the engine made an abnormal loud knocking sound. Unknown warning lights were illuminated. The contact was able to exit the expressway and drove back to Midas, where the contact was informed that the engine needed to be replaced, and the mechanic provided an estimated fee for the repair. The vehicle was towed to the dealer, where it was diagnosed that the engine needed to be replaced; however, the part was not available. The vehicle remained at the dealer for approximately three months. The vehicle was not repaired. The contact related the failure to NHTSA Action Number: PE25001(Engine, Engine and Engine and Cooling). The manufacturer was notified of the failure and informed that the part was not available. The failure mileage was approximately 73,000.

The contact owns a 2014 GMC Sierra 1500. The contact stated while driving at an undisclosed speed and attempting to turn the steering wheel, the vehicle lost power steering functionality. The contact stated that the failure had recurred intermittently and had progressively worsened. A message advising of a power steering failure and to drive safely was displayed. The vehicle was not diagnosed or repaired by an independent mechanic or the dealer. The manufacturer was not made aware of the failure. The failure mileage was approximately 150,000.

The contact owns a 2012 GMC Terrain. The contact stated that while the vehicle was parked in the garage, the front driver's side air bag unexpectedly deployed without an impact to the vehicle. 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 148,116.

Parking brake locking up. There is recall on the brake module for my year make and model but my vehicle isn't on the list and I feel it should be. I'm having the same issues as they are. I can't drive it until it is fixed. Very dangerous.

I was driving on the freeway with my family when the dashboard lights went off and the car started making a noise. The car then started shaking and I immediately pulled over. I was with my family and my children got scared. Previously to this the car had not shown any signs of problems. I had the car towed to the dealership. I received a call 2 days later from dealership stating my car needed a new engine. The car only has 42K miles and has had all oil changes.

The engine seized on us. It only has 18,000 miles on it. This could have caused a serious accident! There was no warning, no indication, it just died and would not restart. We had to have it towed over an hour to get to our closest dealer (and don't get me started on how they treated me!). We were stopped at a stop sign at the intersection and it just died. Thankfully we weren't driving down the highway or in the middle of traffic, we just ended up blocking people from using our lane for quite sometime. The cops were called for traffic control, but no police report was filed.

The contact owns a 2025 GMC Yukon. The contact stated while driving at an undisclosed speed, the vehicle was vibrating abnormally, and the engine seized. No warning light was illuminated. The vehicle was restarted and taken to the dealer to be diagnosed. The contact was informed that there were metal shavings in the oil pan, causing engine failure. The contact was informed that the engine needed to be replaced. The vehicle was being repaired. The manufacturer was made aware of the failure and a case was filed. The contact was advised to contact the NHTSA Hotline to report the failure. The failure mileage was approximately 3,000.

The contact owns a 2018 GMC Sierra 1500. The contact stated that while driving at various speeds, while depressing the brake pedal to slow down, the brake pedal lost pressure, and the vehicle experienced a reduction in braking power. The contact had to depress the brake pedal with additional force to properly slow the vehicle. There was no warning light illuminated; however, the message "Brake Assist" was displayed on the instrument panel. The local dealer was not contacted, and the vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 135,000.