GMC Complaints

The contact owns a 2026 GMC Acadia. The contact stated that while at a stop sign and depressing the brake pedal, the vehicle unintendedly accelerated and crashed into the rear passenger's side of a Semi Truck. Both the AEB and the IAEB failed to engage during the incident. The vehicle sustained severe front-end damage. The contact stated that the air bags failed to deploy, and the Forward Collision Avoidance System failed to engage to prevent the crash. The driver sustained a neck and right shoulder injury. The front passenger seat occupant sustained a right arm and left leg injury, and a headache. No medical treatment was received. A police report was filed. The vehicle was towed away. The cause of the failure was not yet determined. The manufacturer was notified of the failure. The failure mileage was 4,700.

Power steering went out for 2-3 seconds as I was making a turn into a street , this happened twice to be exact

2024 Engine failed while moving at 70mph out of state. De-accelerated rapid as I was changing lanes and was almost hit by two vehicles. Once of the interstate, I made it to the shoulder of an exit ramp that was a blind spot. Cars exiting to this ramp almost always had to veer to keep from hitting me. I purchased this vehicle in October 2024, never knew anything about a recall, was never disclosed to me about recalls. To this day, if I enter my VIN, there is no recall and I have never received any communication stating this vehicle was on recall. I complained to the dealer twice about unusual noise from vehicle, which they dismissed. I took it back to the dealer because my oil light indicated I was "low", this oil is too low, my concern was a leak. Took into GMC dealer, they stated we did not see any leak. Now this. Problem, GA law states in order to qualify for buyback, 24,000 miles or under 2 years. Well, I have 24,986...this automatically disqualifies me. SMH The options I was given are all a NO WIN for me! I was almost killed on the interstate, not to mention the level of stress and issues this car nightmare has caused me. $100k vehicle and I still owe 87K

lost power going down highway and coasted to a stop on the side of the road. car was towed to a nearby gmc dealership and after inspection a new 6.2 motor is needed. I did not notice any warning signals when I lost power.

Was driving down the road at 35 mph and the truck started to shake and the the transmission shifted really hard check engine light came on. Pulled over truck wouldn’t go into reverse and wouldn’t shift correctly. Had my truck towed home called the dealership they said I will need to have it towed in. Several days later the check engine light was off I took the truck around the block it was running okay. Drove it the next day it did the same thing shook really bad shifted hard and wouldn’t shift correctly my go I took reverse. Had it towed to the dealership. The dealership said it was the same problem they are having on other trucks with this same transmission truck is out of warranty and GM will not cover the cost to fix it.

OnStar module failure. No communication with vehicle in the event of emergencies. Safety systems disabled. No remote access to unlock/ lock doors. No remote start. No speed limit notification. All built in apps and wi-fi no longer functioning.

Drivers side seat belt broke where it connects to floor part. Cable broke. Never have had this to happen in my life!!!

I was driving and all of a sudden my break pedal was inoperable. It was stiff and unable to be used. Luckily I was only going 40 MPH. I pulled into a parking lot and my car started shaking and apparently the metal parts from the vacuum pump blew into my engine, which completely wrecked my engine. I nearly could have died and now my 2021 car is completely destroyed.

I was driving down the highway and the top grill trim 84957848 part number, flew off. Hit my windshield. Could’ve caused the small car behind me to blow a tire or damaged their vehicle.

While towing Jetski's the #2 Cylinder has a persistent misfire. Was able to limp to Chapman Chevrolet where it took 2 days to diagnose. Vehicle is below 70K, which just recieved a brand new transmission and torque converter due to metal shavings from converter getting pushed through to the transmission. Service Advisor's Message below: "Performed further diagnosis and requested engine teardown to determine root cause of misfire. During disassembly, found cylinder #2 intake/exhaust valve train failure, including a bent pushrod and a severely scored/collapsed lifter. Inspection revealed the damaged lifter had caused abnormal contact with the camshaft lobe, resulting in significant scoring and wear of the camshaft. The failed lifter and bent pushrod led to loss of proper valve operation and cylinder misfire. Point of failure is lifter #2 that resulted in camshaft failure as consequence. I am in the process of generating a quote and taking pictures for the extended warranty." Seems like another AFM/DFM issue has brought down another GM Motor. Why are these motors not part of the recall, when they are going down the same was as the recall? My safety and my family were put at risk for a possible catastrophic failure and loss of power due to the engine being faulty. There were no warning laps, just Check engine Light, Parking Break Wrench Light. The only other sign was a quite tick that is with most Chevy/GM Motors.