GMC Complaints

Engine failure at highway speed. My wife and I were driving approximately 65 miles per hour when suddenly my vehicle engine RPMs shot up but I lost all engine power and the truck became inoperable. Stranded out of state. No loaner or safe alternative transportation offered. No repair timeline provided. GM Case #: 9-15084178121. GM Customer Care provided no help whatsoever.

I’m contacting you regarding my 2019 GMC Sierra 1500 with the 5.3L V8 engine. The vehicle is currently experiencing a cylinder 8 misfire (code P0308), accompanied by engine backfiring, ticking noise, and exhaust fumes inside the cabin. Additionally, the ESC (Electronic Stability Control) warning light is on, and performance is noticeably affected. To date, I have: •Replaced all spark plugs and fuel injectors •Verified proper ignition coil function •Had an oil change on September 23, 2024, during which I reported early concerns about engine performance (shortly after the powertrain warranty expired) •Had a transmission flush on March 17, 2025, in an attempt to resolve continued drivability issues Despite these efforts, the issue persists. Given the known issues with AFM lifters and camshaft wear on this engine, I suspect a mechanical failure related to that system.

My truck is currently experiencing the connecting rod and/or crankshaft engine components that may have manufacturing defects that has lead to engine damage and engine failure. My truck is currently being looked at a shop for this exact issue. GM recently recalled more than 597,000 vehicles due to engine failures, according to you, the National Highway Traffic Safety Administration. The recall however only lists vehicles within the years of 2021-2024. My vehicle has the same engine 6.2L V8 gas as the recall and I don't find it a coincidence that I have the same EXACT engine experiencing the same EXACT issue! I attempted to speak to GM but they just kept saying my vehicle is not listed on the recall and refuse to investigate this. I included my conversation with them.

The contact owns a 2022 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, the contact became aware of an abnormal roaring sound coming from under the hood. The contact stated that the abnormal roaring sound was persistent and became louder over time. The vehicle was not diagnosed or repaired by an independent mechanic or the dealer. The dealer was made aware of the failure. The contact received notification of NHTSA Campaign Number: 25V274000 (Engine and Engine Cooling); however, the part to do the recall repair was unavailable. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was not made aware of the failure. The failure mileage was 12,000. VIN tool confirms parts not available.

Truck lost all power while towing a trailer driving on the highway. Got it over to the side of highway and lost all power and wouldn't start after parking. Dealership jad truck for over 6 weeks and replaced the motor and would not reset the milage due to manufacturer not allowing it. Since then my rods have a knocking noise occuring while vehicle is running and doesn't sound normal. Rubs rough since the engine replacement.

When i get in my truck to leave after my truck is parked for awhile, and take off after i stop i get a rattling which sounds like its coming from the engine. I brought my truck into the dealship when i noticed the probelm but of course the techs " couldnt hear it". I hear it everyday since!

The engine has 160,000 miles and just driving the camshaft and the lifters went out during normal driving. It showed no problems before hand. I’ve heard from multiple people that this is a big issue with the 6.2l gmc Sierra engines. The mechanic also stated it’s there biggest problem. The repair cost are $4,000 - $6000 dollars and the have to pull the whole engine and just fixing those two things. The cost of an engine is $7000 for a used with 100,000 miles and to me it would just happen again in around 60,000 miles or less. For a new engine non oem so an off brand it would cost $8,00 - $10,000 just for the engine. Almost as much as the truck cost not including the labor. This is completely unacceptable cost for repair for a common problem with this truck.

Engine light keeps appearing and when checked it shows catalytic converter needs replaces and its sensors need replaced. Brake light has short in it and I repaireable

While driving on a two lane highway at approximately 60 MPH the powersteering on my truck failed with warning lights on the dash. I limped it to a town where I could get it scanned and they could not figure out the issue. The issue was intermittent for a few days until it was non-stop. It took over a month to get the reconfigured part from GM to complete the repair, GM had to reconfigure the part to fix the issue I was having. A faulty powersteering control module was the probelm and it required replacement of the entire steering rack and alignment. GM is aware of this issue clearly due to their choice to rework the affected part, but not issuing a recall in light of the issue to take full repsonsibility/reimburse customers that have suffered monetary damage due to their failure to propperly engeineer parts.

El motor de mi camioneta falló por completo empezó a hacerle unos ruidos muy fuertes dentro del motor con solo 80,000 millas es del 2021 la compré el año pasado no llegó ni un año de uso una camioneta que supuestamente era muy buenas Estaba en el momento de lo sucedido estaba con mi mujer y mi hijo en el auto regresábamos de un restaurante acá en Miami y la camioneta se paró de pronto La camioneta fue inspeccionada por la garantía extendida la cual no asumió la reparación Luego del problema si salieron luces amarillas y rojas en la pantalla de mi camioneta