GMC Complaints

The contact owns a 2015 GMC Sierra 1500. The contact stated that the vehicle failed to start. The vehicle was towed to the dealer and the contact was informed that the fuse box had caught on fire during the failure. There were no occupants inside the vehicle at the time of the failure. No injuries were sustained. There was no Police or Fire report filed. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 60,218.

The engine continues to slip and slows down when driving. The following codes are returned back from the onstar diagnostics, Transmission Control Module Requested Malfunction Indicator Lamp Illumination. The DTC is an informational DTC. The DTC indicates an emission related DTC set in the Transmission Control Module. The vehicle has only 132,000 miles, and I have maitain the vehicle in excellent shape. With maitainance, the transmission should last at least 300,000 miles. The Engine and Transmission System is not performing as expected. An issue has been detected in the Transmission System that transfers power from the engine to the drive wheels.

The contact owns a 2019 GMC Acadia. The contact stated that upon parking the vehicle and attempting to shift the vehicle into park(P), the "Please Shift into Park” message was displayed. After restarting the vehicle, the vehicle returned to normal functionality, but the failure became a regular occurrence. The Not-in-Park warning light was illuminated. The vehicle was taken to the dealer, who diagnosed a failure with the transmission control module. The vehicle was repaired. The manufacturer was notified of the failure but provided no assistance. The failure mileage was 11,000.

My vehicle is 2012 GMC Terrain. Oil changes on my vehicle we kept up and i had no major issues with this vehicle. I had an oil change done about a month before i went to start my car and all the lights came on and my car would rumble and wouldn't stay started and was longer drivable. After towing it a service shop they stated the following: The timing chains are damaged, skipped teeth, metal debris found in oil and screen of intake and exhaust camshaft solenoids due to many oil leaks coming form engine and serious internal issues w/engine we recommend replacing the engine. Est cost, 11,061. I had no reason to think my car was in any trouble, as it was driving fine with no problems. I received no such recall letter or phone call and no mention from the dealership i bought the car from back in 2018 that this was an issue or that it was "taken care of" if I had i wouldn't have paid over $20,000. into my car. Reading several complaints online about this exact issue is all new to me. Knowing i could have been driving a vehicle and it could have started a fire in my engine is crazy to think. Because I may have been driving a car with a serious recall on it. I am at a loss right now, financially i am screwed.

The contact owns a 2023 GMC Canyon. The contact stated while driving at an undisclosed speed, he became aware that the defroster had failed to properly defrost the windshield. The contact also stated that because of the failure, the windshield wipers had failed to function properly after becoming frozen. No warning lights were illuminated. The vehicle was taken to the dealer, who determined that the defroster was operating as intended; however, the design was inadequate to defrost the entire front windshield. The vehicle was not repaired. The manufacturer was notified of the failure, and a case was opened. The failure mileage was 3,000.

My tailgate has been unlatching while driving and I do not understand why. It came down while I had my trailer attached and it damaged the tailgate. No one is touching the button that unlatches the tailgate and it is closed when I start driving, but sometime before I arrive to the next destination it's miraculously down. This is very dangerous and I would like help getting it taken care of

The truck is a 2015 GMC Sierra 2500 HD. With less than 51,000 miles, the transmission is gone due to a design flaw. Around march 8th, the transmission went out when I hydroplanned on a two lane road. Haley GMC Airport was wanting $6700 for a new transmission. I contacted GMC and they offered a 15% discount after raising the price to over $7500. GMC has replaced and volunteered recall on their 2015 1500 and 2015 2500 8 speed transmissions but will not do anything about the 2015 2500 6 speed transmission. The transmission where I received a second opinion advised that they changed the transmission on the 2015 after realizing there was a design flaw. I feel that myself and many others whose transmissions died before 100,000 due to GMC design should not pay full price for a new transmission. If this is not the correct channel, please let me know. thank you.

I received a p0747 and p0700 transmission codes on my GMC sierra 3500. It would not engage above 3rd gear and I almost was rear ended by a Semi truck because I was unable to speed up. The vehicle CEL turned on and "Engine power reduced" notification appeared on my cluster. Engine RPMS were at 2800 rpm and my speed limit would not go past ~40mph. I currently have my vehicle being inspected by the local dealership. The vehicle currently has ~19,300 miles

The contact owns a 2015 GMC Sierra 1500. The contact stated that while buckling the front driver’s side seat belt, the bottom half of the seat belt attached to the floorboard snapped and came apart. The contact stated that the failure rendered the seat belt inoperable. The vehicle was taken to a dealer where the contact was informed that there was no recall or warranty on the vehicle related to the failure. The manufacturer was not notified of the failure. The vehicle was not repaired. The failure mileage was approximately 137,000.

Rear window leak causing whole inside back to get soaked. Have paid hundreds of dollars to have sealed didn’t work. New window didn’t work it still leaks. It’s going to cause interior to mold and body to rust. Dealership and glass business both say it’s body issue and they have seen many GMC and Chevrolets with this issue. Google show 1000s with same problem.