GMC Complaints

Twice in the last few weeks my tailgate has opened while driving the vehicle. Prior to this, the tailgate has never dropped while driving since the vehicle has been new. The tailgate was not down whenever I left, but it was down whenever I got to my location. I did not hit the tailgate button to drop the tailgate at any time before during or after this trip. On the one occurrence, items were lost from the bed of the truck, which could cause a road hazard for other motorists. There were no warning lights or notifications that the tailgate was open on the driver information center or elsewhere. I have service scheduled with the dealer on 5/2/25 to inspect the vehicle. I am unsure at what point in the trip the tailgate opened.

Vehicle began idling rough then check engine came on. Acceleration would then vary while driving. Took to GM dealership and they said lifters, head gaskets and cam shaft are bad. The charge to repair is $7,736. Saw GM just did a “voluntary “ recall for this same issue on year models starting 2021-2024. 2019 year should be added as this is a costly repair.

The contact owns a 2021 GMC Yukon XL. The contact stated while starting the vehicle, the engine made an abnormal sound. Additionally, the low engine oil warning light was illuminated while driving. The vehicle was taken to the dealer, who diagnosed that the lifters and camshafts needed to be replaced. The vehicle was not repaired. The contact related the failure to NHTSA Campaign Number: 25V274000 (Engine and Engine Cooling); and the VIN was included in the recall; however, the contact had not yet received a notification. The manufacturer was not made aware of the failure. The failure mileage was approximately 24,000. VIN tool confirms parts not available.

On March 28, my 2023 Yukon Denali stalled on a 4 lane road forcing me to make an emergency stop on the side of the road in a right hand turn lane. The vehicle required towing to a local GMC dealership. They could not restart the vehicle and upon evaluation found metal shavings in the oil. They have recommended an engine replacement. There was no warning, it just stalled and would not restart. My Yukon remains at the dealership and we are still waiting for an engine.

Motor seized up while going around 65mph. Truck lost all power and would not start brought to dealer and they said that it was the crankshaft bearings and something with the connecting rods, the deal told me that they don’t know what to do and is waiting on GM. There is a recall for these issues but no fix. I’m just waiting for the dealer to tell me what’s next but they don’t even know.

The contact owns a 2019 GMC Sierra 1500. The contact stated that while his wife was driving at an undisclosed speed and approaching a stop, the vehicle lost motive power. There was an abnormal exhaust odor and smoke coming from the exhaust pipe. The engine and fuel lights were illuminated. The vehicle was towed to the local dealer and was diagnosed with a misfire in cylinder #5, and the exhaust lifters and camshaft needed to be replaced. The vehicle was not repaired. The manufacturer was not contacted. The failure mileage was approximately 50,000.

The contact owns a 2023 GMC Sierra 1500. The contact stated that upon starting the vehicle, there was an abnormal ticking sound coming from the engine. There was no warning light illuminated. The contact discovered that the VIN was included in NHTSA Campaign Number: 25V274000 (Engine, Engine and Engine Cooling); however, the part to do the recall repair was not yet available. The local dealer was made aware of the issue and confirmed that parts were not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The failure. mileage was approximately 100. VIN tool confirms parts not available.

Driving approx 60mph on expressway and engine stuttered for 3-4 seconds, check engine light came on and vehicle completely shut down. Wouldn't restart. Family with kids had to cross 4 lanes of traffic to make it to the shoulder of an on-ramp. Towed to dealership and they stated the motor seized and needs a complete replacement. Vehicle has 72,000 miles on it, always stored in a temperature controlled attached garage, oil changes before schedule at the local dealership.

Merging onto highway, lost engine power. Cylinder lifter failed, damaged cam shaft, caused damage to coolant system via metal debris, and engine needs to be replaced. 76,000 miles on vehicle, regularly serviced at dealership. I inspected the parts, and was shown the cylinder lifter that had failed and fragmented as well as the galled cam shaft. There were no prior indications of impending failure (no hard shifts, jumping, warning lights, etc). Warning lamps turned on after failure. I asked the mechanic at the GMC Dealership what caused the failure, and wasn't given a definitive answer.

We were driving on the interstate and the car completely shut off. It went to the 'restart engine' screen. My husband put it in neutral and tried to coast off the interstate almost getting hit by cars going 70+ mph. Cars were swerving not to hit us as we coasted across three lanes. One car almost hit another car because they quickly tried to go around us because of our decreasing speed and made that car swerve into the other lane. We ended up only inches off the right lane. We had 2 teenagers and our 1 year old baby in the car with us in the Florida heat. Sitting in that car was truly traumatizing because every semi that passed us, the whole car was shaking because we were so close to the line. I just knew that someone was going to veer off inches and wipe us completely out. Because the engine just shut off, we barely made it off the road so cars were honking at us because they knew the danger we were in not being far enough off the shoulder. We all had to climb out the doors on the right because opening the left side doors would be in the right lane of the interstate. There we sat for 2 hours in 99 degree weather with a 1 year old (who also got bit by ants being in the high grassy area off the interstate) waiting for a tow truck to pick up the Yukon to tow it in to a location that isn't even where we live. We had to wait on someone to come pick us up that could hold 5 people and a car seat plus all of our sports equipment that we had for our tournament that weekend that we were headed home from. A nightmare, truly a nightmare. There was no warning, no lights came on, no heads up that the car was about to completely shut off going 75 mph. It just did, without warning. I was never informed about the POTENTIAL of a recall, or I would have been the first one at the door to get it checked out. My family was put in tremendous danger because of the irresponsibility of GMC. This is a nightmare, truly a nightmare.