GMC Complaints

The contact owns a 2018 GMC Yukon. The contact stated that the message "Transmission Hot - Idle Engine" was intermittently displayed. The vehicle was taken to the dealer, where the TCM was reprogrammed, and the thermostat and the water pump were replaced; however, the failure persisted. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 101,000.

The contact owns a 2021 GMC Yukon XL. The contact stated while his wife was driving 25 MPH and depressing the accelerator pedal, the vehicle failed to respond. The contact pulled over to the side of a parking lot waiting for towing assistance. A dealer was contacted. The vehicle was towed to a dealer where it was diagnosed and determined that the engine needed to be replaced. The vehicle was not repaired. The contact related the failure to NHTSA Campaign Number: 25V274000 (ENGINE AND ENGINE COOLING); however, the VIN was not included in the recall. The manufacturer was notified of the failure but offered no assistance. The contact was referred to the NHTSA Hotline for assistance. The failure mileage was 60,000.

The contact owns a 2020 GMC Sierra 1500. The contact stated while driving at an undisclosed speed, there was an abnormal knocking sound coming from the engine compartment before the vehicle lost motive power with the check engine warning light illuminated. The vehicle was towed to the residence. The dealer was contacted; however, the vehicle was not diagnosed or repaired. The dealer referred the contact to the manufacturer for further assistance. The manufacturer was made aware of the failure. The approximate failure mileage was 138,000.

When I am in park my engine shuts off the light goes from green to orange which indicates it’s still on electrically. I have to turn on/off my vehicle multiple times for it to turn off fully. It’s an intermittent problem.

Check engine light on, Abnormal engine noise and very significant loss of power. Info registered in the repair invoice: tech verify customer concern, check for code found code p0300 and looking to the live data found miss fire on cylinder number 6, tech swap the coil and spark plug with wire, miss fire still on the same cylinder, tech inspect the injector no problem found, remove the valve cover for inspection found, that the rocker arms is loose, customer approve tear down, tech remove the head on the right side to inspect the lifter and the camshaft, tech found damage on the camshaft, camshaft replacement and lifter is necessary, customer decline repair, tech assemble the engine back and returned to the customer. Customer decide to replace the engine, tech replace the engine test to verify repair vehicle working as design

Lifters and rollers failed. Vehicle is at a repair facility and it has been confirmed that the rollers on the cam seized causing metal shavings to build up in the oil. No symptoms or warning lights showed up before the problem was identified.

while traveling at 45 mph, vehicle starting jerking violently and lost most power. the engine began rattling very bad and extreme noises came from engine compartment.

The CP4 pump failed while driving causing vehicle to stall. Upon failure, lost power to steering. Luckily we were on an access road for a rest area and not yet on the interstate. This resulted in a 14.5 thousand repair. No prior warning to pump failure. GM has recently settled a class action related to this pumps failure and has never recalled trucks with this pump to avoid failure.

Throttle position system all of a sudden went bad. My 2017 Terrain started shaking. I was holding up traffic. The sun couldn't go over 5mph. I've read online where this is happening alot in 2010'2017 GMC Terrains.

The passenger side rear wheel went into a pothole while making a right turn on a city street. This resulted in the right rear leaf spring breaking at the forward mounting point. This caused thr rear axle to swivel impacting the rear of the wheel well. The ESC malfunction indicator and impact sensor malfunction llights illuminated appropriately 2-3 miles later after I was in a highway. This is a significant safety concern as I was at an increased speed in heavy traffic by the time the lights illuminated. This not only puts the vehicle occupants at risk, this is potentially a significant risk to other motorist. There were no noticeable indications of damage besides pulling until I was at appropriately 55mph on the highway. The vehicle is currently at a dealership for repair.