GMC Complaints

Vehicle "Low Oil Warning" light appeared at approximately 3000 miles after an oil change. Checked the oil and it was nearly 3 quarts low. Without any visible leaks or loss of oil, I called local GMC service department and had them inspect. They found that 4 pistons and other components needed replaced due to failure. There was no signs or symptoms other than the warning light. The car has been in the shop for 3 weeks. I currently do not have my vehicle, but I was going to use this vehicle for a long road trip and I'm sure this would have been a catastrophic loss, and possibly a safety issue for my family traveling 1k miles at highway speeds.

Truck died and had to have it towed to the dealership. They called me and told me they engine had seized from from bearing failure.

The lifters failed on one side and the dealer replaced only that side under warranty. I paid over 64k for this veh and I am scared the other side will fail while driving.

upon applying brake pedal at low speeds the brake is hard to depress and "choppy" in reacting. this seems same as N192268490 Increased Brake Pedal Effort yet the gmc denali is not apparently in the recall. This has happened on several occassions.

Rear axle locked up driving down the interstate at 65mph. Had I been towing, the incident could very well have caused an accident. Truck taken to dealer and was inspected. Gave an error code of P0747. Per the dealer it was caused by a faulty valve body in the transmission. Part is on back order for months to get fixed. Truck is not drivable as it will not go out of 5th gear. Was told that the problem was found in many models from 2020-2024.

The contact owns a 2022 GMC Sierra 1500. The contact stated that while one of his employees was driving 45 MPH, there was an abnormal sound coming from the engine compartment. The check engine warning light illuminated, and the vehicle lost motive power. The vehicle was pulled over to the side road and turned off. The vehicle was towed to a dealer and the contact was informed that the lifters had caused the cam to become unglued, and the engine needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was 75,000.

My engine blew up while merging onto the interstate. The vehicle completely shut down. A few minutes prior I could tell there was an issue but until that moment there were no warning lights or issues that could be detected. Vehicle has been at the GMC dealership almost a month waiting for a new engine that is currently on back order

The contact owns a 2014 GMC Acadia. The contact stated that the air bag warning light was illuminated. The vehicle was taken to the dealer, where the recall repair of NHTSA Campaign Number: 23V334000 (Air Bags); was performed; however, the failure persisted. The dealer was contacted and informed the contact that the failure was related to the front passenger's side air bag. The vehicle was not repaired. The manufacturer was notified of the failure and informed the contact that a complaint could not be filed. The failure mileage was unknown.

Reported electrical issues beginning one month after purchasing the vehicle. I reported issues for the first year including the running boards not working, entertainment system not operating, hard engine restart/stalling and the reverse camera not engaging. February 2024 the car was driving down the highway and a loud noise began in the engine. Entire car stopped running. Placed in the shop for 29 days to replace the engine, battery, computer, and other items. The next day engine began to stall again. Monday at 10am the car stalled again and was unable to be turned back on. Car was then taken for another 15 days fuel injectors, spark plugs and other items changed. Again received the car back and had issues with stalling and engine revving issues. Turned into dealership and bought another GMC Yukon. GMC refused to admit an issue and refused to help.They only changed out the initial engine and paid for the rental. Car under full warranty for manufacturer plus maintained my extended warranty. Reported to BBB.

RPM’s started to fluctuate while driving with cruise on. Noticed no issue with shifting until torque converter grenaded blowing metal through the transmission 2 days later. Transmission has been replaced with GM reman by a GM dealer. New transmission lags going into gear when it’s cold and shifts hard. GM tech said this is common and no way to correct it without replacing it again.