GMC Complaints

Just had my 2019 GMC sierra 1500 Denali engine fail. My truck has 75k miles oil changed regularly no codes, issues or dash lights. Recently had it at GMC I Folsom California for a rear window replacement. Full inspection with no issues and nothing found wrong. Sunday 12/7 with my girlfriend and son in the truck about to get on the freeway felt a weird shift as I got on the freeway on-ramp. As I went to accelerate I had my traction control lights come on, lost power, and flashing check engine lights limped the truck off the side of the freeway and exited to a gas station. My truck wasn’t leaking anything and oil pressure was good but it sounds like popcorn was being made in my engine when it was on. Had my truck towed to Folsom GMC and yesterday 12/8 got a call I need a new engine. Called GM corporate to talk to them and opened a claim. GMC dealership got an initial help with 15% of the bill telling me I would need to pay $13,315. Talked to the service advisor and they put in a request for help from GM. Today at 9:00 a.m. they offered 50% coverage and I was able to get a little more but it still has me paying $7,500 and it will be 2-3 weeks to get the repair done. The dealership also will be getting me a loaner vehicle. This dealership has not been great but with this they are trying and doing a lot. However 75k on a truck that does not haul or have heavy use and is 7 years old with no prior issues is crazy. I was told cylinder 8 showed a misfire. Once they opened it up there was damage to the pushrods, valves and lifters with significant metal throughout the motor. I’m still waiting for corporate GMC to get back to me and hoping they will help or offer more money off as this is still a very large bill for a single father of 2 around the holidays. I bought the truck used with about 32k on it in 2022 and have had no mechanical issues or codes related to the motor or transmission.

Clicking/rubbing noise when turning slowly. Rear differential issue diagnosed by dealer.

I brought my 2023 Yukon in for the 6.2 GM inspection, and was told my engine was good, and the engine oil was changed. Approximately 3 weeks later the engine in the Yukon failed (seized) while I was towing my boat at 55mph, nearly causing an accident. I was able to pull the vehicle and boat to the side of the highway in a precarious location, which put me, my family and property in danger. There were no warning signs or messages on the dash, and no engine sounds. I believe GM's recall inspection and "preventative" oil change did nothing, and gave me a false sense that the truck was safe to tow with. I want to make sure the NHTSA is aware that the engine failed even after being screened with the recall. THIS FALSE REASURRANCE THAT THE TRUCK IS SAFE IS PUTTING THE PUBLIC AT RISK

Engine coolant thermostat failed under 55,000 miles and had to have it repaired on my 2020 Acadia. The 2021 Acadia has a recall on the thermostat.

I'm vehicle has experience both active recalls for similar model year but my VIN isn't listed as been one that is covered by the call. 25V274000 and 21V739000.

onstar telematic module failed. dealer stated it shorted internally. upon researching online this is a pretty common issue. this module is important to safety as it can detect & report crashes, help get first responders on scene in the event of a crash, etc. my vehicle was less than three years old and had an active onstar subscription at the time of failure.

The contact owns a 2021 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, the engine seized. The contact was unaware of a warning light being illuminated. The contact stated that while attempting to start the vehicle, the vehicle failed to start. The vehicle was towed to the dealer, where it was diagnosed with engine failure. The contact was informed that the engine needed to be replaced. The vehicle was not repaired. The contact referenced an unknown engine recall; however, the VIN was not under recall. The manufacturer was made aware of the failure, and a case was filed. The contact was advised to report the failure to the NHTSA Hotline. In addition, the contact was informed that the VIN for the vehicle was a Canadian VIN, and the mileage was displayed in kilometers. The failure mileage was approximately 120,000.

The contact owns a 2015 GMC Yukon XL. The contact stated that when the vehicle was started, the vehicle started shaking with a tapping sound coming from the engine compartment. The contact stated that there were no warning lights illuminated. The contact stated that while driving at an undisclosed speed around the block, the failure persisted. The vehicle was parked at the residence. The vehicle was taken to a dealer, where it was diagnosed and determined that the lifters in the engine were loose, and the lifters and the right side of the engine needed to be replaced. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 100,000.

Engine began knocking noise at around 150k miles, noise became faster with throttle speed. Brought in to repair shop, mechanic confirmed connecting rod failure, suggested replacing engine. Replaced engine as suggested.

The contact called on behalf of her son who owned a 2022 GMC Canyon. The contact stated while her son was driving at an undisclosed speed, the brake pedal was depressed, and the brakes failed to engage. Additionally, the infotainment screen was inoperable. The front camera module warning light was illuminated. The vehicle was taken to an independent mechanic where it was diagnosed and determined that the front camera module needed to be replaced. The dealer made the contact aware of NHTSA Campaign Number: 24V133000 (ELECTRICAL SYSTEM, FORWARD COLLISION AVOIDANCE); however, the VIN was not included in the recal. The vehicle was not repaired. The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline to report the failure. The failure mileage was unknown.