GMC Complaints

While out of Town driving back home Wheel lock up on my 3500hd dually 2023 gmc .. vehicle had shudder effect and from 75 to 25 mph drasticly and engine reduced power light came on and wouldn’t come out of drive and then after stopping vehicle To cement parking safety block the vehicle had multiple codes for valve body and transmission failure relating to the na242454441 issue on previous year models and gmc is not working properly on a resolution but admitting that it is having the exact issue of previous models and with this issue I was promised for full replacement at no cost I am currently working with executive team to help fix the issue that the dealership in Levelland Texas is not honest about what codes are within parameters when infact have A dtc code reader and was able to get a photo and have history of code showing etc

I was driving down the hwy and all of a sudden the car went into reduced power mode and the dealership is saying it’s a high pressure fuel pump which is not covered under the standard warranty My vehicle only has 46000 miles Fennigan GMC Rosenberg tx

2022 Limited GMC Sierra AT4 1500 motor seized on highway with loss of propulsions on highway while towing an empty horse trailer. Truck had 64,000 miles. While driving it had lack of power and then flashed on dash to shift neutral and press start/stop button. Coasted to a stop on the side of the highway and shut truck off at which point it would not turn back on. Officer stopped to check as complaints about a truck partially on the side of the road. Had someone come to assist and try to diagnose. Had to tow truck off highway with trailer while officer followed behind with lights. Dropped truck off in empty lot unhooked trailer and left truck to be towed to dealer the next day. Dealership confirmed that day engine had failed under the L87 6.2L V8 motor recall. Gave approx estimate of two weeks to fix. Currently at day 38 with no fix completed yet. GM and dealer have both given run around blaming each other for the delay in providing a comperable "like" vehicle that can supplement towing needs broken truck was used for.

catastrophic internal engine failure on my 6.2L engine. Several times vehicle was to Gm Gunn Buick GMC regarding power loss knocking noises. Received the run around that vehicle past all their initial inspection and test. They only replaced a VALVE LIFTER REPLACEMENTS BANK 2 without further assessment of the engine or components. I took my vehicle to another shop to conduct a thorough inspection and they found broken metal from the piston/skirt and likely connecting rod damage inside the crankcase. Broken piston skirt/piston material • Cylinder wall damage/scoring • Metal debris throughout lower end • Possible bent/broken connecting rod • Potential crankshaft/journal damage from debris circulation • Oil pickup area contaminated with metal Lifter failure leading to dropped valve/ piston contact • Rod bearing failure • Oil starvation • Spun bearing • Piston failure/detonation Advised GM Gunn Buick and GMC of the secondary engine inspection by another shop. Manager told me it was my issue now and they wouldn’t replace my engine it wasn’t there problem. I had to pay out of pocket for a new engine replacement due to the negligence of GM and their agency lack of maintenance and customer care and service

I keep getting this warning "Action Required Steering Assist Is Reduced Drive With Care" . This warning has occurred randomly for several years. Recently, after getting this warning the check engine light came on and the engine temp gauge stopped indicating. I have seen a bulletin from GM that this condition is covered under a 'special warranty extension' for a single model year, but it is common over at least 5 model years. This should be a recall because of the steering assist issue.

Crash on 5/5 rear ended car - airbags did not deploy . Received concussion and neck injury.

Truck does not automatically shift into park when the door is opened. Getting out of my truck, I forgot to shift into park and opened the door, and the truck moved forward with automatically shifting into park, or applying the parking brake. I have a 2015 Jeep Grand Cherokee that did the same thing. There was a safety recall set forth by the NHTSA to have the car go into park when the door opened to prevent someone for being run over by the vehicle. My 2025 GMC Sierra is experiencing the same issue. I was not harmed, but can definitely see someone getting hurt.

Truck was started using auto start and I drove roughly a mile down the road smelt burning and looked in the back seat, I saw smoke and promptly pulled to the side of the road shut the vehicle off then I heard a loud pop and saw the back drivers side window shattered.

I started my vehicle and as I accelerated I started to hear a knocking noise. The vehicle and engine have been inspected by the dealership. The problem has also been confirmed by the dealership.There were no warning lights or messages before the knocking noise started.

Lifegate wont open all the way airbag light is on and truck shimmering when I drive it