GMC Complaints

While I was driving on highway, engine shut down and wouldn't restart. I needed to be towed.

2025 GMC Sierra 1500 shifted from Park to Drive uncommanded, accelerated uphill, and crashed while idling, keyfob outside of vehicle, March 2025. ESIS couldn't replicate and falsely claimed I didn't put it in Drive, despite photos and no one inside.

I had taken my vehicle to the dealership for a front grill assembly recall by the end of the day they called me and said I needed to leave my truck at the dealership because of a coolant control valve and they don't recommend me driving it. They told me they would get me a rental car but we're not able to get me one until 11 days after my vehicle was in the shop. I told them I needed a truck for work but was told they could only offer up to 44 dollars a day and I'd have to take a vehicle that was given to me or pay out of my own pocket to rent my own. I had the case escalated but have yet to hear anything back from GMC if they have even recieved the part or what is going on with this backorder part! From what I've been seeing and reading this is obviously an ongoing thing with GMC they have known about this coolant control valve for years now but instead of producing them so they are no longer on backorder they continue to produce plenty of new vehicles to throw on the sales lot. I am out of thousands of dollars because I don't have a truck and only 2 weeks into this mess with GMC. The vehicle is paid off and I continue to wander when a part or gmc will give me a better option. So I can continue with my business.

The contact owns a 2023 GMC Sierra 3500. The contact stated that while hauling a trailer and driving approximately 40 MPH, the contact attempted to merge into traffic and the message "Restricted Power Mode" was displayed. During the failure the transmission failed to properly shift into a higher gear, and the vehicle failed to exceed 67 MPH. The contact stated that later while driving at an undisclosed speed, the check engine warning light illuminated. The vehicle was towed to the local dealer who diagnosed that the transmission valve body was faulty and needed to be replaced. The vehicle was not yet repaired. The manufacturer was notified of the failure. The failure mileage was 33,800.

The vehicle is available for inspection upon request. While utilizing Super Cruise on the interstate in stop and go traffic conditions, the vehicle will come to a complete halt and jerk (as though you I slammed on the breaks). This has happened approximately 4 times and each time, driving conditions were good and during hours of daylight. The halt is very violent and causes the vehicle behind me to slam on their breaks. The latest instance occurred on Tuesday May 29, 2025 and forced the vehicle behind me to swerve off of the road. The emergency breaking warning does not sound nor is there a reason for it to do so as it has happened when the vehicle in front of me is moving with traffic and has not slowed down or applied breaks. The super cruise system also does not disengage or say that the road information is unavailable. The vehicle simply comes to an abrupt halt, to the point where if things are in the seats they will fly forward and then the system behaves as though nothing has happened. Traveling speeds vary between 10-20 mph when it malfunctions. The problem has not been reproduced and it shouldn't because it is a serious safety hazard for the driver and other commuters on the road. I was told a module software update would fix the issue however that did not. There were no warning lights that occurred prior to any of the instances.

The contact owns a 2018 GMC Acadia. The contact stated that after parking the vehicle and shifting to park, the vehicle failed to turn off. During the failure the message "Shift to Park" was displayed even though the gear shifter was in park(P). After several attempts, the vehicle was able to be turned off. The contact also stated that during the failure, the vehicle would roll backwards. The cause of the failure was not yet determined. The manufacturer and local dealer were notified of the failure, but no assistance was offered. The failure mileage was 70,000.

On numerous occasions the key fob is not detected and locked out of vehicle. Key fob notice on panel saying it’s not detected while driving. Took it to Jim Causley GMC dealer several times and then they kept vehicle for a week unable to duplicate and sent me on my way. This is still happening with no help.

The contact owns a 2022 GMC Sierra 1500. The contact received notification of NHTSA Campaign Number: 25V060000 (Structure); however, the part to do the recall repair was unavailable. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The vehicle was taken to the dealer, where it was determined that the chrome front grille deflectors needed to be replaced. The dealer confirmed that parts were not yet available. The manufacturer was not made aware of the issue. The contact had not experienced a failure. Parts distribution disconnect.

The contact owns a 2019 GMC Yukon. The contact stated while driving at an undisclosed speed, there was an abnormal rattling sound coming from the engine compartment, prompting the contact to discontinue driving the vehicle. The check engine warning light was illuminated. The vehicle was taken to the dealer, who diagnosed a failure with the cam shaft. The vehicle was repaired. The manufacturer was notified of the failure, a case was opened, and the contact was referred to the NHTSA Hotline for assistance. The failure mileage was 170,000. The VIN was not available.

While driving My 2019 GMC Sierra I heard a loud Bang And lots of Misfires. The vehicle immediately slowed on its own causing me to pull off the road and endanger myself and traffic around me. Engine light came on and the traction control light was flashing. The Vehicle was brought to Dealer where they Diagnosed the problem all lifter rods were frozen and the cam shaft was cracked. The Dealer has the affected parts.The vehicle was in the repair shop for over two weeks and close to 7,000.00 in repairs.