The contact owns a 2020 GMC Sierra 2500. The contact stated that the check engine warning light was illuminated, and the message "Reduced Power" was displayed. The vehicle was taken to the dealer, where the turbo actuator and wastegate position sensor A-circuit were replaced; however, the failure persisted. The vehicle was taken back to the dealer, and the contact was advised that another diagnostic test was needed. The contact declined to pay for the diagnostic test. The vehicle was taken to a retired GM mechanic, who diagnosed the vehicle with turbo charger failure. The vehicle was not repaired due to the cost. The manufacturer was notified of the failure, but no assistance was provided. The failure mileage was approximately 100,000.

Source: NHTSA complaint ODI #11747347 · view all complaints for this vehicle at nhtsa.gov

The main tailgate will not go down or function properly and it says online there is a national recall for this, but does not come up when I search my vehicle. When I turn on my left turn signal the brights flash for no reason and this is a known major issue with the vehicles as well. The trucks computer is telling me low on coolant even though it is not that has already been fixed through a 3rd pARTY WARRANTY Parking brake was stuck on when I bought the vehicle and had been for a long time you could tell and I had to pay over $1100 to fix it at GM. The Ford collision system does not work properly and the cameras will come on at certain times when they're not supposed to be and not come on when they are supposed to be

Source: NHTSA complaint ODI #11706292 · view all complaints for this vehicle at nhtsa.gov

TL* THE CONTACT OWNS A 2020 GMC SIERRA 2500. THE CONTACT STATED THAT UPON DRIVING OVER A HILL AT 45 MPH, A VEHICLE WAS STOPPED IN THE MIDDLE OF THE ROAD. IN AN EFFORT TO AVOID HITTING THE VEHICLE, THE CONTACT DROVE THE VEHICLE OFF THE ROAD AND INTO A CONCRETE CULVERT AT THE END OF THE RAVINE. THE AIR BAGS DID NOT DEPLOY UPON IMPACT. THE AUTHORITIES WERE CALLED TO THE SCENE AND THE CONTACT WAS RUSHED TO A LOCAL HOSPITAL VIA AMBULANCE. THE CONTACT WAS DIAGNOSED WITH FRACTURED VERTEBRAE THAT MAY REQUIRE POSSIBLE SURGERY. A POLICE REPORT WAS FILED AT THE SCENE. DUE TO THE ACCIDENT, THE VEHICLE WAS TOWED TO AN INDEPENDENT MECHANIC WHERE THE VEHICLE WAS REPAIRED. THE DEALER NOR THE MANUFACTURER HAVE YET TO BE NOTIFIED OF THE FAILURE. THE VEHICLE WAS REPAIRED AND SOLD. THE FAILURE MILEAGE WAS APPROXIMATELY 15,500.

Source: NHTSA complaint ODI #11413345 · view all complaints for this vehicle at nhtsa.gov

Cracks in the rear sliding window plastic upper rail glass guide causing Rear window leaking water and causing mold from water leaking. GMC has a service bulletin number 18-NA-383 knowing of this issue and not telling customers purchasing the GMC vehicle. The service bulletin was released in 2019 before purchasing the truck and they still didn't inform the customers. My child rides in the back in a car seat and now has been breathing in this mold and mildew for how long. I have had my vehicle in with Titus will Gmc in olympia multiple times for service and inspection of various recalls and still didn't inform me of this issue.

Source: NHTSA complaint ODI #11660995 · view all complaints for this vehicle at nhtsa.gov

The rear defroster massively overheated. It started heavily smoking and eventually exploded the rear windows. Only warning sign was the smoke which we noticed quickly because the windows were up. Had the windows been down we might not have noticed before a fire started. I'm taking it to a dealership now. This module also triggers on from a remote start. Extremely dangerous!!!

Source: NHTSA complaint ODI #11701143 · view all complaints for this vehicle at nhtsa.gov