*Median odometer reading when the problem happened, where owners gave one. One complaint can name several problem areas.
Engine
Recall N262576260 has just come out. My truck has the same symptoms/conditions consistent with the recall. I have a code P0420, check engine light, high oil consumption and loss of power. also, the GM representative i spoke with told me i have an open recall N242450631. it does not show on the NHTSA website and it does not show at the dealer. the high oil consumption has allowed the turbo to damage the catalytic converter and something in the engine to tap due to less lubrication.
Oct 20, 2026Engine
I was driving my truck (2019 GMC Sierra 5.3L) while pulling a travel trailer to go camping. As I was getting onto the interstate, without any prior warning, all at once the truck began to shake, make a concerning noise, and various warning lights began displaying on the driver information panel. I pulled the truck off as safely as possible and had the truck towed to a GM Dealer for service. After investigating the engine, the service department informed me that an exhaust lifter failed, camshaft lobe was damaged, and a cylinder wall was scored resulting in the engine having to be replaced. As this happened while on the interstate with many other passenger vehicles and semis around us, and…
Aug 1, 2026Engine
The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving at 65 MPH, the vehicle experienced a slight loss of motive power, an abnormal sound emitted from the engine, and all warning lights illuminated. The contact pulled over to restart the vehicle; however, the vehicle failed to restart. The vehicle was towed to the contact's residence and was later towed to the dealer, where it was diagnosed, and the contact was informed that the engine failed and needed replacement. The manufacturer was notified of the failure. The failure mileage was 139,802.
Jun 18, 2026 · 139,802 milesPower train
Engine died while on the freeway. Had the truck sent to my dealer via flatbed with AAA. They diagnosed it as the known lifter issueâlifter broke and metal went into the camshaft and scored it. So I need to replace the camshaft and lifters. Theyâre quoting me $12k for that. I have 83000 miles on this car and I take very good care of it.
Oct 15, 2026Engine
VEHICLE STARTED RUNNING VERY ROUGH & DISPLAYING ERROR CODES FOR "STEERING ASSIST IS REDUCED", "SERVICE PARKING BRAKE", AND "SERVICE ESC". WHILE DRIVING VEHICLE IT WOULD ACCELERATE & DECCELRATE ON ITS OWN. LIMPED THE TRUCK TO OUR LOCAL REPUTABLE MECHANIC WHO RAN TESTS & DETERMINED IT AS AN ISSUE WITH THE LIFTERS. IT IS KNOWN GM IS CURRENTLY HAVING ISSUES WITH THE 6.2L V8 ENGINES. CLEARLY THIS ISSUE IS WIDER SPREAD THAN THE CURRENT FEW YEARS THEY ARE ADMITTING TO. WE ARE HAVING TO HAVE A NEW ENGINE INSTALLED AT OUR EXPENSE.
Sep 12, 2026Engine
The engine started making a loud knocking noise and lost power. Luckily the event happened in a neighborhood and no one got hurt. The check engine has been on for brief periods prior to this event.
Oct 11, 2026Engine
The engine developed a noise while driving. The engine has been replaced. So inspection of the original engine is not available. The failure happen on the interstate system in a large metropolitan city, in heavy traffic. Our independent service center confirmed that one cylinder was not working. We had messages about brakes needing service, the ECS needed servicing. check engine light was flashing. These items came on about 5 minutes before we pulled off the interstate system.
Sep 26, 2026Fuel system, gasoline
The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving 25 MPH, the accelerator pedal was depressed; however, the vehicle failed to accelerate as intended. The contact stated that later while attempting to start the vehicle, the vehicle failed to start. The contact's son later attempted to start the vehicle, and the vehicle started. The vehicle was taken to the dealer, but the diagnostic report was incomplete. The contact referenced an unknown recall; however, the VIN was not associated with a recall associated with the failure. The manufacturer was contacted and made aware of the failure. The failure mileage was approximately 50,000.
Aug 8, 2026 · 50,000 miles
Owner complaints are submitted to NHTSA by the public and are not verified. Shown as filed (NHTSA removes personal details); long reports are shortened.