GMC Complaints

dangerous lost of propulsion in traffic while my minor daughter was in the vehicle, I was driving my truck that has a 6.2 Engine gmc that is currently being reviewed Engineering Analysis EA25-007, I bought engine back in October 2025 and incident happen Early March 2026 Around 10,000 miles

The rear window on my 2017 GMC Sierra shattered unexpectedly without any impact. The vehicle had been remote started in very cold weather and the rear window glass suddenly shattered while the truck was parked. There was no rock strike or external damage that would explain the failure. I later learned about GM Customer Satisfaction Program N192265660 regarding rear window defroster thermal events affecting certain 2014–2019 GMC Sierra and Chevrolet Silverado trucks. Based on the sudden failure and the conditions at the time, this appears consistent with that issue. The Auto Rear Defog feature in the vehicle settings was turned off, however the truck had been started using the remote start feature when the glass shattered. Photos of the shattered window are available. I am submitting this report because the rear window defroster system may cause the glass to overheat and shatter unexpectedly.

While driving on the road the vehicle started sputtering and stalled! We pulled to the side of the road and tried to start the car but it rolled and would not start. We called a a mechanic who had it towed and found out that the fuel pump and the fuel control board had failed. Both have been replaced and the truck seems to be working again. Heard several other persons had this issue with their GCM Sierra Elevation so we wanted to report since there is currently no recall. Luckily the traffic was not going that fast or we could have had an accident and been seriously injured.

My car says Shift to park when I try to turn it off. Leaving my battery to drain.

After starting the vehicle, I turned on the rear defrost button and within a few minutes the rear window started producing smoke inside the vehicle. I turned the truck off immediately and then approximately 30 seconds later, the rear window on the passenger side shattered. There is a recall that was issued for this exact problem but when i contacted the dealership, I was informed that the recall applied to Canadian vehicle models only and that there was no recall issued in the U.S. for this problem. I believe that there was a great risk for my family's safety as my child sits directly in front of this window and presented an injury risk to her, as well as the overall fire risk that could have occurred if I had not noticed the issue immediately. There were no warnings before the incident occurred. I had to pay out of pocket to have the window replaced.

While operating my 2024 GMC Hummer EV at a low speed in a school zone, I came to a complete stop at a stop sign and began making a left turn. As I initiated the turn, the steering wheel suddenly locked and became unresponsive. I was unable to turn the wheel back to the right or regain control of the vehicle’s direction. At the same time, the vehicle did not respond as expected when attempting to stop. Because I could not steer or properly control the vehicle, I collided with another vehicle. The impact with the other vehicle is what ultimately brought my vehicle to a stop. During the incident, multiple warning messages appeared on the dashboard, including a message indicating: “Service Steering System.” My vehicle sustained minimal damage due to its height (a bent side step), however the other vehicle sustained damage. Police responded to the scene and a report was filed. I was NOT issued a citation. (see report attached) The vehicle has since been towed to Northwest Hills Chevy/GMC in Torrington CT for inspection by the GMC manufacturer. This incident raises serious safety concerns, as the sudden loss of steering control at low speed could have resulted in significantly more severe consequences under different circumstances. I was in a school zone at dismissal time going to pick up my son. This appears to be a potential mechanical or electronic steering system failure. I believe this represents a serious safety defect that should be investigated to prevent similar incidents.

After getting the engine recall done on my vehicle over 6 months ago, I was driving down the highway at 70 mph last Saturday and without warning "Press Start" began flashing on my dashboard and I immediately began decelerating and my car put itself in Neutral. I was able to get to the side of the road safely. I was then able to turn the car off and back on. I was able to again accelerate into the road but once I reached 3/4th gear my car again began beeping with the "Press Start" warning and put itself into neutral. I was again able to coast on the side of the road to a stop where I called a tow truck to drop at my local GMC dealer. When roadside assistance showed up the car wouldn't even turn on anymore and I'm now being told that I need a full engine replacement even though I correctly completed the recall previously.

at roughly 5,000 miles had lifter failure which caused loss of power. That was repaired under warranty. Same issue at 86,000 miles - loss of power. New engine which I had to pay for. Same issue at 126,000 miles. New engine required. Covered under warranty. Side note. New engine will only have balance of warranty from 2nd engine or about 5,000-6,000 miles. first incident Feb 2001, second incident about Nov 2004, third incident Mar 2026.

Error shift to park it come and go all the time. You cannot lock your car when this happens. Cost $500.00 to repair.. common problem for r This year.

The 2020 Yukon started to have serious loss of speed and decelerating issue when the vehicle would slow down and down shift to a lower gear. The issue with this is that once it downshifted it woul not engage in a gear again and leave me stranded on the road. I had to turn off the car and restart it for it to reengage in a gear enough to get it moving again and sometimes I had to try more than once to get it moving once it no longer wanted to engage in a gear. So in the 10 mile drive, I was left stranded at least 15 times. Each time I had to restart and restart again for the vehicle to engage in a lower gear. Once moving, it would sometimes it would engage in a higher gear and sometimes it would not. Thank goodness I wasn't traveling on the highway when this happened. Beware to anyone if this was to happen on the highway while in the middle lane while in traffic. And the check engine light never turned on and thus no code to help detect the issue. Took it the day before to have it looked at and was told nothing was wrong with it since there was a code and they could not duplicate the issue I described. WHAT?? They reset some transmission computer setting but it only made it worse by the next day. Now this 6 yr on 2020 GM Yukon is at the dealership service department requiring a new transmission for $7200. Said that the transmission fluid was showing particles of stuff and color was 'burnt', I think. Transmission fluid was changed at it's regular check up time so that didn't cause the issue and nor should it have bits and pieces in it and discolored. Is there any recourse to GM and it's crappy transmissions??