GMC Complaints

Truck just made a year old and killed on me in the middle of road. They are saying I need a new engine and maybe transmission. Could not shift truck into neutral, which left me stranded on busy road. For unsafe and had me nervous. Trying to get GMC to buy me out of this vehicle. Had same problem with 6.2 liter prior to this truck. Engine and transmission was replaced. They promised if I bought new truck, I wouldn’t have the issues and here I am again. This is terrible.

I have had nothing but issues with this vehicle from the day I purchased it. I should have been more leery of purchasing a vehicle with so few miles on it as a certified vehicle. First issue lift gate wouldn’t work. Had to have sensors replaced twice. Next was the purge valve sensor that has went bad 3 separate times. Then the crankcase vent sensor. Paid a fee for diagnostics, it was not repaired took it back when the engine light came back on, they replaced it without charging but I was advised it’s not covered under warranty. And most recently my check engine light came on yet again today now reading an issue with the engine cooling system. Unfortunately the dealer is so booked out, my only option is to drop it off and hope they can get it in by a cancellation or no show. Seems there are new issues ever 3-6 months with the car.

Having issues with inner tailgate opening on its own and items falling out of bed/box onto road!

When it rains, within 24 hours, the windows do not automatically move down enough to open the door on command of pulling the door handle. This disallows the ability to close the door back if the door is open, barely underneath the lip of the sky panels. Because of this power loss, the mirrors do not open, the door locks do not work, and the windows do not work. To be able to re-close the doors, the sky panels must be removed and either left off or replaced. Essentially rain leaks into the body where wiring that controls door locks, door windows, causing electrical failure of this circuit only. After some hours of time without intervention function, restores, presumably due to drying out of wet parts.

While driving I experienced a loss of forward momentum, and watched the RPMs go up to 3000, wording came on the dash, but I was in traffic and wasn't able to read. I was able to reach next light about 1/4 mile, and stopped. Mad a left turn and within 200 feet, same issue. I pulled over and called OnStar. Towed to dealer. Dealer put on lift right away, as it was just in for 1st service on Saturday, with 4775 miles. Dealer informed me of a bulletin out for removing transmission pan, and splitting plates to check a ball size for 6th gear, which they found during the computer diagnostic checks. They claim to have a part tomorrow, and will install soon after.

The contact owns a 2018 GMC Acadia. The contact stated that while shifting the gear shifter into park(P), the "Shift to Park” message was displayed on the instrument panel. The contact was forced to shift from drive(D) to Park(P) repeatedly before the failure was corrected. In addition, the contact stated that while driving at various speeds, the steering wheel would become sticky with the "Steering Assist Reduced - Drive with Care," message displayed on the instrument panel. The contact stated while driving at various speeds, the infotainment system glitched and performed independent functions, causing the driver to be distracted. The contact stated that the infotainment system was replaced when the vehicle was purchased due to the failure; however, the failure recently recurred. The manufacturer was made aware of several failures and informed the contact that there were no recalls on the VIN. The vehicle was not repaired. The failure mileage was approximately 105,000.

Vehicle engine stalled while driving in school parking lot. Safety concern as car when from “R” to “N” while backing up (2x). Engine would not turn on afterwards. Vehicle code P129F showed trouble with fuel pump power flow control module.

The contact owns a 2016 GMC Canyon. The contact stated that while driving on the highway at 65 MPH, the vehicle experienced a loss of power steering functionality, and the steering wheel became stiff and difficult to turn. The traction control and Service Vehicle Soon lights were illuminated. The message "Power Steering Fault - Drive with Care” was displayed. The contact pulled over to the shoulder lane to restart the vehicle and was able to continue driving. The contact stated that the failure had occurred on several occasions. The vehicle was taken to a local dealer and was inspected; however, the vehicle was not diagnosed. The contact was informed that the VIN was not under recall, and there was no failure cause for the failure found. The vehicle was not repaired. The manufacturer was notified of the failure. The approximate failure mileage was 94,000.

Engine locked up / froze up while driving 75MPH on interstate i-10. Vehicle is now in the shop awaiting a new engine. It will probably lock up as well, finding there is no known guaranteed reason for this engine failure. Dealership provided a junk rental and said it would be a few months before repair is complete. My towing bills were not paid by GM. My insurance had to pay which is simply not right! I'm sure they will pull a mystery motor off the shelf and hope for the best... Very dangerous!

I believe the torque converter failed and resulted in the transmission starting to fail. It still goes down the road but shudders when slowly gaining speed