GMC Complaints

Carr paused, and then stopped in the middle of the highway, without any warning lights or identifiers. Other vehicles had to come to abrupt stops or even veer to avoid hitting me the manufacturer is aware, and has had a large lawsuit settlement due to a faulty rear seal causes massive internal oil consumption without any warning to the operator of of the vehicle. My research has shown that it is a catastrophic common issue with this vehicles model and year a certified GMC dealership has identified this as the reason for the sudden shut down without warning, not one warning light illuminated to indicate low or any other issue. The car has had regular oil changes and maintenance. This well-known defect should normally be caused for alarm and the safety of drivers would also for a mass recall.

I have a recall on this vehicle that GMC has failed to provide me parts/repair and this recall will be 3 years old in June. I have emailed the local dealer, the manager of the local dealer, GM corporate, and no one has followed through. The best I came to getting the repair was that Corporate made sure I had an appointment and dealer had my part, I went to that appt at my local dealer in Jan 2025 (Premiere GMC of Carlsbad, CA) and waited 2 hours with cars ahead of me (even thought I had an appt) only to be told the part was not there, they would order it and get back to me. Happy to [provide proof of emailing local dealer, GM Corporate etc. with no resolution. I cannot sell my vehicle without this repair done. And I continue to drive daily in an unsafe car.

Top radiator hose is leaking coolant. Radiator hose O ring appears to be faulty.

The contact owns a 2018 GMC Sierra 1500. The contact stated that while driving at various speeds, there was an abnormal vibration in the steering wheel. There was no warning light illuminated. The contact stated that the tires were replaced, and the wheels and bearings were inspected by an independent mechanic, but no failure was found. The independent mechanic related the failure to an undisclosed transmission recall; however, the dealer informed the contact that the VIN was not under recall. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure, but no assistance was provided. The failure mileage was approximately 28,000.

The contact owns a 2022 GMC Yukon XL. While the contact’s wife was driving at an undisclosed speed, the vehicle unexpectedly went into LIMP Mode, and the check engine warning light illuminated. The vehicle failed to accelerate to exceed 30 MPH. The vehicle was taken to the dealer, where it was diagnosed, and it was determined that the transmission valve body had failed and needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure and referred the contact to the NHTSA Hotline for assistance. The approximate failure mileage was 65,000.

2023 Yukon Denali XL 6.2l: GM oil change recall performed (October 2025) and GMC dealership noted no issues. Prior to recall oil change, at aprox 5k miles interval (45K total miles), check engine oil light on dash and was over 1 quart low. Next oil change at aprox 50K miles, no check engine light came on, but certified mechanic drained and measure oil level, 1.5 quarts low. Engine often sounds odd at cold start, ticking sound. Now an oil change is $100 more, due to special oil, but not compensated for extra cost. Brake calibers failed. February 2026, engine light on, then off, then hood latch dash light warning now on and off. Huge safety concerns with the 2023 GMC Yukon 6.2L.

I was on the interstate and when I was passing a vehicle in the middle lane the engine lost power, shifted to N. I tried going back to drive it would not shift. Stopped the suv and tried restarting it. When I pushed on the brake and tried to start it the whole vehicle would loose power to all my screens. I had this vehicle towed in back in September 2025 due to not cranking over when starting. They did the recall for the engine at that time. The engine light would randomly turn on but would go back off within the same day.

The contact owns a 2022 GMC Yukon. The contact stated that while operating the vehicle, the computer system malfunctioned, causing the instrument cluster to turn off unintendedly. Additionally, the doors failed to immediately unlock, and the driver’s side mirror could not be adjusted. The vehicle was taken to the local dealer, who was unable to determine the cause of the failure. The manufacturer was not contacted. The failure mileage was 22,000.

Upper radiator hose gasket leaks at connection point to radiator and no gasket replacement part. GMC forces you to buy entire hose

While driving 13-15mph down the road the front right upper control arm ball bearing sheared off causing the tire to lean in rubbing the wheel well, forcing my truck to veer to the left across the other lane of traffic. Luckily there wasn't any car next to me.