GMC Complaints

The contact owns a 2017 GMC Sierra 1500. The contact stated while driving at various speeds, the vehicle hesitated and shuddered upon depression of the accelerator pedal with the check engine warning light illuminated. The vehicle was initially taken to a dealer where the dealer found no defects with the vehicle. The contact was then informed that the shuddering was normal operation. The vehicle was then taken to an independent mechanic and the mechanic discovered a defect with the bell housing. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 29,000.

My vehicle is currently in the shop getting the motor worked on for a bad lifter. From the information the mechanic provided me this is a common issue with the vehicles that have the Active Fuel Management system. They are seeing many of these vehicles have to come in and have very expensive repairs. My first quote I received was $16, 000, they told me I needed a whole new motor and this assessment cost me $365 and a rental car while they looked at the truck. Now it is in the shop again and the estimate is $6000 to machine the cams as there are metal shavings in my oil. I had to again rent a rental vehicle and have not had my truck for a week. This is the third mechanic that has seen multiple of these motors have to be replaced or repaired due to this issue. I kept up on my oil changes and other recommended car maintenance and so did the owner before me. I had my last oil change approx. a week before the loud ticking noise began, then my vehicle began to have a noticeable loss of power when driving and eventually began shuttering and my check engine light began to blink and I took it to the shop. A year ago I had to replace my tail lights. I was able to find where others were recalled by my VIN for some reason was not included in the recall. They started shorting out and working only part of the time which is very dangerous when stopping, especially at night. I had them replaced and paid almost $700 for the two back lights.

Headlights flicker about once every minute. it gives the impression that i am using my brights for oncoming traffic and has caused other drivers to "flash" their brights at me and i get flashed after passing other vehicles. I am concerned that at one point the "flicker" will just shut off and leave me totally in the dark driving country roads. i drive mostly on rural highways. it would be impossible to drive without lights. Also the flicker is causing other drivers to potentially "road rage". I took this to the dealer last month. GM has not come up with a fix and has told the dealer not to do anything at this time. problem has occurred since deliver in early June

Violent shifting in the transaxle when vehicle is shifting between lowers gears. Transaxle causing a shuddering vibration on inclines. It feels like the engine is misfiring, but it is the torque converter/transmission/transaxle failing.

Shift To Park. Vehicle does not turn off completely after pressing the stop button, while parked. The car horn alarms you the vehicle is not shut down. The vehicle will not allow you to lock the doors with the remote control.

Headlights flicker every few minutes when on. Can be distracting to driver and other cars on the road at night. Seems to be an issue for several people with these new 2024 trucks but GM has no fix yet.

When I shifted to Park and hit the button to turn the car off, it continuously chimed and flashed the Shift to Park message on the dashboard. It would not allow me to fully turn off the car, stating I was not in Park, even though I was. I would have to turn the car back on, shift into drive or reverse, move forward or backward a little bit, hit the brake a few times, put it back to Park, hit the button, and hope it would turn off. It usually took four or five times of this routine before it would finally turn off correctly. It began happening more and more frequently over the course of a week by the time I could get it into the dealer. This is a safety issue, as the car was not fully in Park, and leaving it that way would have drained the battery as well as not allowed me to lock the doors while parked in my driveway. Thankfully, I have an extended warranty (car has 55,000 miles) and only had to pay my $200 deductible, but it was an over $500 fix. As this EXACT SAME issue is prevalent in these cars and was recalled on my same model in previous years, I feel the recall should be extended and these expenditures reimbursed.

Car battery does not turn off. Once parked, the display reads “shift to park”. The car is parked; engine is off. The battery stays on for hours (4 hours and counting this time).

Headlights flicker constantly. While being extremely distracting and unsafe while driving, it also causes other driver to think I’m flashing them. This leads them to flashing their high beams at me when oncoming and pulling over to let me pass when in front of me. Also, after I complete a right turn, my left signal flashes 3-4 times. I brought it to the dealership and they said they suspect a “software glitch” but that GM hasn’t determined a cause or solution yet. It appears to affect models built in May/June 2024 and on. I was also told that the display screen in the truck can be/may become affected, which is the only way to control the lights in the vehicle. They could not provide me with a loaner or replacement and said to keep driving the vehicle as-is until GM can come up with a fix, despite repeatedly agreeing with how unsafe it is. I have filed a report with GM as well. I was told to “make noise and maybe they’d get it fixed sooner.”

December 28- Transmission goes bad, gets vehicle back Feb 17th - •Dangers include loss of vehicle control, wreck, cannot hit gas pedal. March there’s an exhaust leak. •Inhaling is dangerous as this contains carbon monoxide, potential fire, May y axle on muffler •Dangers include reduced engine performance that can lead to wrecks, carbon monoxide poisoning, and failed emissions test. July Engine failure in repairs until August •Can cause accidents August coolant leak •Can lead to engine overheating and lead to engine failure causing accidents. September unknown reason, car just keeps shutting off while driving. •Dangers in this one speak for themselves. Inspection can be done. Problems were confirmed but just keep continuing to occur. No warning signals, car just keeps breaking down for various reasons.