GMC Complaints

I have a 2021 GMC Sierra 1500 AT4 3.0L diesel pickup truck with 98,500 miles. The coolant control valve failed on my vehicle and for some reason it is not covered under GM's special bulletin that covers this part 15yr/150,000. Ridiculous.

The contact owns a 2021 GMC Yukon XL. The contact stated that while driving approximately 50 MPH and merging onto the freeway, the check engine warning started flashing and the vehicle started losing automotive power. The vehicle was driven back to the residence. After stopping the vehicle, the vehicle was idling roughly and was shaking abnormally. The vehicle was towed to a local dealer. The dealer diagnosed the vehicle and determined that the engine needed to be replaced. The vehicle was not repaired. The manufacturer was not informed of the failure. The contact researched online and became aware that there were two open investigations for engine failure that included the year and the model vehicle. The failure mileage was approximately 94,000.

Engine failed at high speeds on interstate. When my Truck shut off the steering and braking system went out and getting to shoulder of interstate was difficult with others around me. Express lanes were limited on emergency shoulder therefore my truck was partially on the high speed driving lane. 911 was called out to block freeway lane. Check engine light blinked right when truck shut down.

We were driving down the interstate at speed and the Engine shut off unexpectedly. The truck flashed a notification on the dash asking to turn it back on. Pressing the on button would not turn the truck on. The tow truck company also couldn't get it to shift into neutral so he had to drag it up the tow truck After getting towed to a dealership they told us they had no one to look at it that day so we got a hotel room 5 hours from home and in the morning they said the engine is siezed and will need to be replaced.

“Service Driver Assist System” message appears every time I turn on my truck. Vehicle would randomly break when driving at slow speeds and show the forward collision alert even if no objects/ car are approaching or being approached. I am concerned about my safety because those sudden hard-breaks could cause an accident.

Top grill assembly blew off in high winds scratching the windshield and cracking part of it.

Complete engine failure at 1838 miles. Need complete engine replacement. Estimated time unknown for replacement parts.

While accelerating from a stop, the oil pressure warning illuminated. The driver immediately pulled over within approximately 0.15 miles and shut the engine off. Oil was actively leaking from the vehicle. The truck was towed and diagnosed with oil cooler line separation at the crimp fitting, resulting in rapid oil loss and catastrophic engine failure. Sudden oil loss while driving creates a safety hazard. This failure appears consistent with known issues involving oil cooler line assemblies on similar vehicles.

While idling, my vehicle has a strong exhaust smell inside the cabin. Per the GM Dealer, this is due to faulty flex hose.

This is separate for VIN [XXX] I had to change dealerships because Beck & Masten South / GMC would NOT provide me with a loaner after being told I was on the list and I was next in line. I waited a month and drove to them and spoke with the girl who oversaw loaners. I explained I had severe safety issues such as front-end wobble which is related to transmission issues. And the oil consumption issue and oil light. Once again, I was re-assured the loaner program was indeed still active and I would be put on priority. Again to no avail I had wasted too much time with Beck & Masten. After months of this I found out I did not have to take it to the dealer I bought it from. So, I took it to Monument Chevrolet. I explained my concerns related to the front-end wobble which was very intermittent. And the oil consumption issue which I was very concerned with due to the year model and mileage of the truck. Also, the 75,000.00 price tag was really has me extremely upset... Monument Chevrolet treated me well. I had actually brought it in and called about the steering which was greatly affected by the severe front end wobble more than one time. I was told at first the oil consumption was pretty normal. Until I told them how much I had to add between changes. I have attached two work orders to this complaint. These work orders show what was done at 18017 miles and 18323 miles. The later work order was when the PICO test was done. Also, an oil consumption test was started once I picked the truck up. After I had driven it for 2077 miles and was bringing the vehicle back to Monument Chevrolet, as instructed for the oil consumption results, when a loud squeeling, then hard knock, power loss and I pulled over. I called Monument and was instructed if I could get it to start and bring it. I drove it to them while knocking and rough running. It has been in the shop for over 2 months for an engine replacement. 2077 miles after recall work! REFER TO: COMPLAINT XXX INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOI