GMC Complaints

My truck supposedly passed the initial recall for the 6.2L GM engines. AT THIS TIME THEY CHANGED THE OIL AND SAID THE ENGINE WAS FINE! 5 months and one oil change (performed at the same GM dealership using the new recommended oil) my engine seized up while driving approximately 55 mph in rush hour traffic. The engine made a banging and clanging noise and lost power approximately 1/4 miles after the initial noise. This almost caused two accidents as the traffic had to come to a sudden stop, That’s engines are extremely dangerous to both the owners and the driving public on the highways alongside them. p the failure of the engine put me in a highly dangerous situation. This “oil” Fix is not doing what GM is saying it will do. I was told yesterday that my vehicle will need a new engine and radiator. This is simply dangerous and it makes for a horrible financial situation with the truck already needing a new engine.

Drastically reduced power on highway resulting in reduced acceleration due to code P0198 engine coolant control valve position sensor. Required me to drive at reduced speed on highway to get to dealer. Safety issue.

The contact owns a 2012 GMC Yukon. The contact stated that years ago, the engine was replaced with a rebuilt engine. Recently, after starting the vehicle, there was an abnormal banging sound coming from the engine. The banging sound continued, and the vehicle shut off without warning. Due to the failure, the vehicle was towed to an independent mechanic, and it was discovered that an engine bearing had failed, and the vehicle was diagnosed with engine failure. Neither the dealer nor the manufacturer was notified of the failure. The vehicle was not repaired. The failure mileage was approximately 47,000.

At 22,000 miles I experienced issues while driving on a 150 mile trip. We frequently take this particular drive. We choose to driver later in the evening to miss commuter traffic. This even we pull over for a late dinner and hear a loud ticking noise while the the truck seems to lose power. I turn the vehicle off and start it again and its worse, it barely idols and shuts down. I'm in a parking lot and drive down the block to a gas station where serves only gas and no mechanics onsite. I turn off the car and wait 5 mins and restart, same results but this time all the warning lights come on. We end up finding a hotel and in the morning i find a Chevrolet dealership down the block, I ask if I can take it in, there the advisor connects to my obd port and says there are many issues and needs to see a mechanic. I manage to get it towed 80's to the original dealership. Advisor says the engine is bad and replaces it. Now my vehicle has 38,000 miles and I run into the same issue, loud ticking sounds and low power. Immediately I drive it home and the next day have it towed to the dealership to have it looked at. The advisor said during their analysis they saw metal in the air filter so another engine has to ordered and installed.

On Star module quit working in our Yukon, which in turn makes it useless to have any of the safety features. On Star and GM know this is an ongoing problem, but no recall has been issued. Neither company will repair unless an $1100 fee is paid. Why install On Star if you know it will malfunction. Since there is a monthly service fee I think they need to make sure the vehicle has the correct parts.

The contact owns a 2015 GMC Sierra 1500. The contact stated that while at a complete stop and attempting to shift into reverse(R), Drive(D) or park(P), the gear shifter was stuck, and the contact had to go underneath the vehicle to move the shifter cable into the intended gear. The vehicle was taken to an independent mechanic, where the upper and lower shifter cables were replaced. The contact stated that upon returning to the residence and attempting to park the vehicle, the gear shifter failed to remain in the intended gear and was moving unintendedly. The vehicle was not repaired. The dealer and the manufacturer were not contacted. The failure mileage was approximately 225,740.

The engine has been burning oil since purchased but really highlighted when at 47k miles I got a dashboard message saying “reducing power to engine” I checked the oil and it didn’t register in dipstick. I added 3quarts of oil to show up on dipstick. When I changed the oil which I did at my own garage only 2.5qrt came out including what was in filter. It’s since take an average of 2.5qrt between oil change at 7500. Also the transmission is slipping which happened after warranty expired at about 69k miles and I don’t want it to repair or repair until gm fixes these issues which they know are problem in2020-2021 models but they haven’t addressed it. My truck has been serviced at the dealership except fo 3 oil changes. The issue are noted but the answer is car burn oil typically between changes. Yeah they do if it was 20yrs old not 3yrs. The issue lies with GM. It’s Needs to be addressed.

Vehicle experiences multiple simultaneous failures including “Steering Assist Reduced / Drive With Care” warning, extremely loud cooling fan operation, temperature gauge not functioning, tire pressure monitoring system failure, and widespread electrical issues (windows, mirrors, infotainment delay). Issues occurred together and are consistent with numerous owner reports for 2019 GMC Acadia models. Condition affects steering assist and engine temperature monitoring, creating a potential safety risk.

The contact owns a 2022 GMC Yukon. The contact stated that the vehicle was consuming an excessive amount of oil. The vehicle was taken to the dealer, where it was diagnosed, and metal shavings were found in the engine oil. The dealer replaced the camshaft and lifters; however, the failure worsened. The contact stated while driving approximately 65-70 MPH, the vehicle stalled and lost power steering functionality. The contact's husband was able to pull over to the side of the road. There was no warning light illuminated. The vehicle failed to restart and was towed to the residence. The vehicle was then picked up and diagnosed by the dealer. The dealer determined that the engine had seized and needed to be replaced. The contact had opened a case with the manufacturer for buyback assistance due to safety concerns. The vehicle was not repaired. The failure mileage was approximately 46,000.

Rear camera for in cabin rear view is improperly sealed for cold weather and constantly fogs which renders the camera worthless. I was also sent brand new side lights from gm that were improperly sealed and built condensation them after a month or two.