GMC Complaints

The contact owns a 2024 GMC Acadia. The contact stated there was an abnormal squeaking sound coming from the vehicle while depressing the brake pedal. There was no warning light illuminated. The vehicle was taken to a dealer and the brake pads were replaced; however, the failure returned several days later after the repair. In addition, the contact stated that transmission fluid was leaking from the vehicle. The contact also stated that both taillights had failed to operate as needed and the message "Check Left Rear Turn Lamp" and "Check Right Rear Turn Lamp" messages were displayed a day apart. The vehicle was taken back to the dealer where the mechanic confirmed that there was a transmission fluid leak due to defective bolts. The dealer also replaced the rear taillights. The contact was also informed that there were no issues with the brakes, even though there was a noise coming from the vehicle. The manufacturer was not notified of the failure. The vehicle was not repaired and remained with the dealer. The failure mileage was approximately 1,000.

The Yukon was driving normally and just lost power while driving 55mph on the highway. Then I got off the highway to pull over and check it out and the Yukon started shaking while running and in Park. The truck would not drive over 30mph without shaking and what sounds like misfiring.

The contact owns a 2024 GMC Sierra 3500. The contact stated that the exterior lights of the vehicle were flashing erratically, and the tailgate was opening unintendedly. The contact stated that while driving at various speeds, the vehicle experienced erratic transmission shifts, and the vehicle was jerking and made an abnormal clunking sound. The check engine warning light was illuminated. The contact pulled over to a truck stop and parked the vehicle. The contact stated that the battery became fully drained while parked with the windows rolled down in snowy weather. The contact stated that after waiting 6 hours for AAA to arrive, the vehicle jump-started. The contact stated that the battery had drained on several occasions. The vehicle was taken to the dealer, where it was diagnosed that the two batteries needed to be replaced. The vehicle was repaired; however, the failure persisted, and the vehicle overheated while driving. The contact stated that GMC OnStar was contacted and informed the contact that diagnostic trouble codes related to the transmissions were retrieved. The vehicle was taken to another dealer Weston Buick GMC (22555 SE Stark St, Gresham, OR 97030) to be diagnosed. The vehicle was being diagnosed. The vehicle was not repaired and remained out of the contact's State of residence. The contact related the failure to an unknown recall; however, the VIN was not included. The manufacturer was notified of the failure and covered vehicle rental expenses that allowed the contact to return to their residence. The contact stated that the vehicle was used for load transportation, and the failure had caused both the contact and her husband to be stranded while delivering loads, which caused lodging expenses and loss of wages. The failure mileage was unknown.

I have taken my vehicle to 3 seperate mechanics (GMC, AAMCO and Independent). They all agree that my valve body inside the transmission must be replaced. The problem is that valve bodies are on a national back order and cannot be fullfilled for months, putting my transmission at risk for further failure. Reading online forums, there are many GMC owners facing this same issue. The mechanics at GMC are requesting that I change out my entire transmission, since that will be a quicker solution than waiting months for that valve body. Now, I am being told that they are having difficulty locating an original manufactured transmission. This puts me in a serious bind because my truck is my only vehicle and there are no valve bodies or transmissions to fix this issue. My truck is only a 2020 and I just surpassed 100k miles. There were no dashboard warning lights that indicated my trucks problem. Only the fact that my truck is shuddering when shifting gears and that a diagnostic tool had to find the source of the problem. This problem started about 5 months ago and has progressivly gotten worse.

The contact owns a 2021 GMC Yukon. The contact stated that there was an abnormal sound coming from the vehicle. While the contact’s wife was driving at undisclosed speeds, the vehicle stalled. The driver was able to coast off the roadway. The vehicle was taken to the local dealer, where it was diagnosed that the camshaft needed to be replaced. The vehicle was repaired, but the failure recurred. The vehicle was slow to start. The contact stated that after refueling the vehicle, the vehicle failed to start. The vehicle was towed to the local dealer, where it was diagnosed that there was an oil pump failure. The vehicle was repaired, but the failure persisted. The contact stated that the failure was related to NHTSA Campaign Number: 25V274000 (Engine and Engine Cooling). The vehicle was taken to the local dealer, where it was diagnosed that the engine needed to be rebuilt. The vehicle was repaired, but the failure recurred. The contact stated that the rod bearing had failed, and the engine seized. There was no warranty on the vehicle. The vehicle was repaired, but there was an issue with the payment. The manufacturer was contacted, and informed the contact that the dealer was in charge of the process. The failure mileage was approximately 120,000.

My 03 Yukon Denali is experiencing all of the same things that the recall on the 2021 Yukon is experiencing. What do I do? The recall notice I am referring to is N252494000

The contact owns a 2020 GMC Sierra 1500. The contact stated that occasionally while driving at various speeds, several unknown warning lights remained illuminated, and the vehicle lost motive power. The vehicle was taken to a local dealer to be diagnosed, and the contact was informed that DTC: P0016 was retrieved, and it was confirmed that the engine had failed and needed to be replaced. The vehicle was not repaired. The contact referenced NHTSA Campaign Number: 25V274000 (ENGINE AND ENGINE COOLING). The contact expressed a concern that the remedy was the same engine that was prone to failure. The manufacturer was notified of the failure. The approximate failure mileage was 150,000.

While driving 75 on the highway the vehicle shut off completely, shifted to neutral and a message flashed on the dashboard to "press start again". This has happened previously when my 16 y/o was driving but we chalked it up to user error. Scheduled appointment with dealership. There were no warning lamps, no lights illuminated on the dashboard. The vehicle just cut off and I have not been able to reproduce the issue.

The engine on my vehicle has been consuming approximately a quart of oil every thousand miles for months. I have made this issue known to the dealership who services my vehicle over that time period. The dealership (Radley Chevrolet in Fredericksburg, Virginia) and particularly the management has not been concerned about my issue. I have also contacted GMC. I've explained to Radley Chevrolet and GMC that as a [XXX] while in the military [XXX] that my vehicle will leave me and my family stranded somewhere without recourse. Both are aware of the ongoing issues and have not addressed my many documented concerns. I have an extended warranty, so I'm covered for parts and labor for years. Again, the concern is for my safety and the safety of my family. This vehicle could possibly leave me as [XXX] and my family on the side of the road. I have reported these concerns numerous times. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

The engine is not shifting properly, and the vehicle loses speed while driving and hesitates to accelerate. At time, it feels as though the car is not moving at all. This issue has occurred on multiple occasions, affecting both me and my family, and has forced us to pull over because the vehicle could barely move forward. This happed once on the highway and almost caused an accident. Additionally, the check engine light remains on at all times.