GMC Complaints

The coolant sensor was faulty and required a replacement coolant reservoir. No cause for this provided other than it went bad.

My truck is currently experiencing shuddering when driving. This happens at random times but is becoming more frequent. I have taken it into service shops on numerous occasions, and they have not been able to identify the cause due to my truck not exhibiting these conditions when they are diagnosing it. I have run out of funds to continually pay for diagnostic fees, so I have had to let it go until recently. Now it shudders, shifts very harshly, rpms fluctuate continuously, knocking noise when driving, and in the mornings when I first leave for work, my truck will not shift out of first without revving high in rpms. I took it to a mechanic and was told that it was my torque converter, which has now damaged my transmission. All of which I have to pay for out of pocket. These symptoms started when my vehicle was still under warranty (around 30,000 miles). I even flushed the transmission, and it did not help. This is my daily driving truck, and I use it to go to work and transport my 3 young children around. Most of our driving is done on the highway at high speeds (70 mph). When my truck shudders or shifts harshly, I feel that it is going to cause me to lose control or wreck, putting not only my life but my children's lives in danger. I have not consulted a lawyer, as I do not have enough money to do so. I have not had the manufacturer look at it, because when I called about it, they told me I would have to pay for all service fees since it is out of warranty. The only warning lamps I get is when it goes into limp mode (which is at least once or twice a month) and by the time I used to get it to a mechanic, the light was off and they said there is nothing they could do about it. All of this has been happening to some degree since it was around 30,000 miles and only getting worse. The fact that I have put over $20,000 into this (not including my monthly payments of $990) and now have to replace the transmission & torque converter is ridiculous.

I was driving down the street and suddenly lost all motive Power, vehicle became difficult to control. I have a video. The car also made a grinding feeling and very loud whining noise

The front upper grille deflector/hood bulge flew off randomly while driving. No signs of it previously detaching or anything. Just came off.

bought car brand new at 427 miles car started bucking shaking pulsating while driving bought to brennen gmc plattsburgh ny at 811 mile did same thing but worse brought back to dealership they put camshaft actuater and solenoid in at 6041 mile car was motor started knocking stalling controlable in traffic back at shop

2019 GMC Yukon XL. Purchased pre-owned from a dealership in July 2023. This month, August 2025, my transmission has failed. Apparently this defect is notorious for this particular year of GMC Yukon XL. There was a lawsuit against GMC but it was closed in June 2025. The issue is real and widespread and GMC should ABSOLUTELY be responsible. There’s no reason a six year old vehicle should require this extensive repair.

I bought 2016 Yukon XL 9/2020. At 74k miles (2022), the transmission was replaced by warranty. Now (2025), at 126k miles, the transmission needs replaced again. This can’t be normal.

The contact owns a 2011 GMC Yukon XL. The contact stated that while attempting to refuel the vehicle at the gas station, fuel was leaking out of the fuel tank. The vehicle was towed to an independent mechanic, where the vehicle was lifted. The mechanic then informed the contact that the fuel pump was rusted and that the frame were severely rusted. The contact was informed that the frame was fractured and had holes and was being held up by the body. Additionally, the mechanic informed the contact that the alignment had failed due to the failure. The vehicle was not repaired. The used car dealer where the vehicle was purchased was notified of the failure, but no assistance was provided. The manufacturer was not notified of the failure. The failure mileage was approximately 271,000.

The contact owns a 2018 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed toward the residence, the accelerator pedal was depressed and traveled to the floorboard, and the vehicle failed to drive forward as intended. The vehicle started rolling backwards and the contact carefully maneuvered the vehicle while attempting to park. There was no warning light illuminated. The vehicle was towed to the dealer and diagnosed with transmission failure. The contact was informed that the transmission needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 101,000.

The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving on three occasions and stopped, the vehicle started shaking abnormally. The check engine warning light was illuminated, and the message to "Check Parking Brake" was displayed. The contact engaged and disengaged the parking brake. The vehicle was taken to the dealer where it was diagnosed and determined that the lifers and cam shaft needed to be replaced. The vehicle was repaired. The manufacturer was notified of the failure. The failure mileage was 74,000.