GMC Complaints

This Saturday morning driving my family to Bradenton as I was coming off the hwy to my exit when I experienced a brake fail I thought, brakes got real hard and I couldn't stop the car on time like I wanted to, so I had to press the brakes pedal harder to come to a complete stop, three different places no one knew what could be the problem until I took it to GMC dealership they can only give a code P0556 / U0401 SERVICE BRAKE ASSIST, seems it was too late to checked out they where about to close , something to do with the busters not sure yet but it's getting checked out tomorrow morning, I was driving on cruise control at a speed limit when this happened, will let you know what's the result of my situation.

FUEL PUMP CONTROL MODULE The fuel pump control module failed while sitting idle at a major highway intersection during the noon rush hour. All efforts to remove from the highway failed because the electronic shifter could not be moved to the neutral position and the electronic parking brake could not be disengaged. It was two hours before a tow truck arrived and traffic was backed up for approximately one mile. The vehicle was towed into the dealership where the problem was identified and the fuel pump control module was replaced. (Invoice attached.) I am unaware of any accidents related to this specific incident, however given that traffic was backed up as far as it was, it is certainly a possibility. The component was not inspected by anyone other than the dealership. There were no warnings, indicators, or symptoms prior to the failure. The same component (FUEL PUMP CONTROL MODULE) failed again more recently. Fortunately it occurred in a shopping mall parking lot and only caused inconvenience and delays. However, there is evidently an issues with this particular component. (Invoice included to verify part failure and replacement.)

On [XXX], I was driving my 2016 Yukon Denali on a trip to Maryland. While in Maryland, I was driving my vehicle. As I approached a street to make a right turn, I braked to make the turn. I slowed down to make the turn. As I made the right turn, my steering wheel ability became hard. I felt a stiffness in the steering wheel as I came out of the turn. My Denali became un-maneuverable. I lost my power steering ability in the steering wheel and I observed my power steering service light indicator warning come on. I pulled my vehicle to the side of the road and turned off my vehicle. I started the engine with no change in the steering mechanism. After twenty minutes passed, I restarted the engine. I was able to drive with normal power steering conditions. On [XXX], while driving my Denali, I lost power steering maneuverability while driving. My power steering service light appeared and indicated service was needed and that the Electric Power Steering (EPS) Assist failure occurred. Based on research, It appears that the same problem has occurred in other models of GMC vehicles. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

On all chevy / canyon models 05 thru 12 there is an issue called "passlock" which prevents the vehicle from starting, it will leave you stranded. The failure is the ignition housing with the passlock sensor, not the actual key / tumbler, the part has to be replaced. The problem / failure is so common that you can "google" 2005 thru 2012 chevy colorado gmc canyon passlock issue" and find the root and a how to fix / repair guides. I spent almost $600 at the GMC dealer, they found no error or trouble codes in either on board computer, I showed the service advisor the issue, online diagnosis and suggested the repair. This is so dam common it should be a defective part recall and all repairs and costs covered by GM / GMC

At 66,963 miles my transmission failed while driving. The check engine light came on and the car would not shift out of first gear. The car was towed into Gilchrist GMC in Tacoma WA. and I was informed I needed a transmission replacement, cost of $7552.24. Come to find out there is a class action lawsuit currently filed for GM owners of this transmission, claiming some 800,000 GM products contain a knowingly faulty transmission. A recall should be in place being that nearly a million vehicles are affected by this.

Purchased 2024 GMC Sierra 1500 Pro 2/28/2024 with 6 miles on it. Drove vehicle home (20 miles). Picked up and dropped off Grand Daughter from school. Proceeded to my Mom's house and took her for a ride then came home. Next afternoon went to take out garbage and noticed puddle by passenger rear tire. Got under truck and found shock to be completely wet. Called Dealer and made appointment to bring truck in next morning. Brought truck in next day and Dealer confirmed that shock was blown. Shock is not in stock but was ordered. Currently waiting for delivery to set up appointment to replace shock (Only the one that is blown of course). Truck now has 108 miles. 60 of those miles are driving from, back to and back home from the dealer. Now it sits with cardboard under it and once repaired, I have the bonus of scrubbing multiple oil slicks off of my driveway. Glad I wasn't towing or carrying a payload...

I was driving and my brakes seized up. Could not apply pressure at all. This could have caused serious injury to myself and my daughter as we were driving alone 3 hours from home. I was able to get into a parking lot but now my car won't start.

On four different occasions my tailgate came down by itself. Once while driving and on three other occasions before I drove off.

While driving down the road at random times of the day, random days, random drive periods, random locations, the DIC and touch screen along with radio will shutdown and restart, like rebooting the system or just starting the truck. I loose the mph, gauges, navigation, everything on the dash and touch screen the it will come back on like nothing happened. I have contacted 2 dealers and they say I need to download updates but when I go to update it is not required or needed.

It started year and a half ago involving my tailgate. The buttons to operate by upper and lower tailgate failed to operate on the rear of the truck, but cab button and remote button would open the full tailgate. Returned truck to dealer and they replaced the rear control. It worked for approximate 4 or 5 months the the total tailgate button failed, half tailgate button worked no problem. About 6 mths ago I went to drive to work and hit a bump felt like something bounced but really didn't think of tailgate being open. Drove on interstate for 7 miles at speed of 70 to 75 mph. I had my structural firefighting equip in the bed. Stopped at a drive thru for coffee then drove 5 miles to other side of town to my workplace put truck in reverse and my camera showed the ground, my tailgate was open. Thank goodness nothing fell out of the bed. 2-3 days later left for work, hit bump and felt the rattle in the rear again, stopped and tailgate down, closed tailgate and it opened again immediate after closing. This has occurred numerous times, now the half gate now unmatched along with entire tailgate and opens hitting hitch, scratched paint off. Thought it was me hitting keys in my pocket but continued to occur with key in cab. My mileage warranty passed so I was waiting to get some extra cash to fix the tailgate latches. Have not seen any recalls for GMC sierra 1500 denali, thought I would file a "complaint".