GMC Complaints

Transmission was shuddering and slipping and then completely went out. Would not engage any of the gears. This happened while driving through the mountains without towing anything. My family and others on the mountain were at risk since the transmission was slipping out of gear and no safe place to pull over. It had to be towed to a dealer and they confirmed the transmission was toast and they replaced it, of course not under warranty. $800 tow bill and $6.893.98 to replace the transmission at a GM Dealer...Also, had to get a rental car ($318).

Consistent with NHTSA Special Coverage Adjustment 17336, the A/C condenser began leaking in my 2017 GMC Yukon XL. I am filing this complaint for NHTSA to consider extending the mileage limit for the special adjustment. Unfortunately, this occurred at approximately 80,000 miles, or 8,000 miles after the special coverage adjustment. It may have, in fact, occurred sooner than 80,000 miles. I noticed the problem at the end of May 2023, having not engaged the air conditioning unit since on or about October 15, 2022. During that time, I probably put 8,000 miles on the vehicle. The problem was confirmed by Wilkins Automotive in Glen Burnie, MD. They provided an estimate of $2,600 for parts and labor to fix the problem. When I contacted GM and mentioned the special coverage adjustment, they offered me "400 or 500" GM points, or the equivalent of a few oil changes. I ultimately had it repaired at a reputable independent repair shop for $1,050. FYI, the GM dealer quoted more than $600 for the freon. While freon is expensive item, the independent repair shop charged me just over $300.

--Unwanted Reduction in The Front HVAC Blower Speed and Loss of Radio, Auto AC not working as designed --driver seat vibrating as the lane departure warning activated; I had turned the seat vibrate function off on 25 June 2023. I then went into settings to turn the function off again, and the system would not allow to make the change, it stayed in vibrate function --the passenger front window will not go up automatically, had to hold the button to make the window go up all the way. I then had a message in the DIC, that said, “Open and close passenger door”. I did so, at the next stop, but the message stayed on the DIC and the window still would not go up automatically with the button -- when the vehicle is operated and the AC is NOT on, just the fan, and windows down, and the auto temp set at 68 degrees, when at idle, there is an obvious increase in very hot air coming from the vents and stays that way until the vehicle is back in motion. Then it seems to adjust back toward normal outside air. During all this operation the recirculation is open to outside air --auto rain sensing windshield wipers; stops at full arc and hesitates during operation --driver side review mirror does not go back to preset 1 position, when put in reverse, both mirrors tilt lower, as I have set, but when put back into drive, the driver mirror does not fully recover until I push the 1 setting --DIC message of key not in vehicle, even when the key is in vehicle and vehicle is in motion, the DIC message stays on screen saying key not in vehicle --with AC in ON position, cold air stops and very warm/hot air starts coming out for about 30-60 seconds, then cold air starts coming out again, happens during driving and stopped, at any speed --Truck WIFI does not connect automatically SOFTWARE NOT UPDATED FROM GM- OTHER SAFETY ITEMS ARE AFFECTED --Auto headlights --Auto brakes --Auto wipers --Auto systems not working as designed

My airbag indicator lit up and I was not involved in any accident or even a fender bender. After this the engine indicator lit up as well, I had to replace the battery, change spark plugs at the local Firestone. Now I have a problem with the theft indicator and the vehicle does not turn on. Several problems have come up since the airbag indicator lit up.

Upon start up the HVAC fan speed reduces by self and will not increase by own in auto mode.

2019 GMC Sierra 1500 Limited transmission problems could include shifting delays, grinding when accelerating, the car shaking on the road

Reference your GM/Chevy recall NHTSA [XXX] , I have a 2020 GMC truck with a failed Fuel Pump Control Module, same part/same part number used in the SUVs. Are you going to recall the trucks also. Lucky for me, mine failed as I pulled into my drive way. Had to have my truck towed to the dealership, 2 days later informed my FPCM was bad, and of course there are no replacement part available. [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

While parking in San Francisco after driving for about 100 miles, the brakes felt they had lost all power, the pedal was pressed down to the floor and caused the braking distance to increase drastically. There was a fence post to the left of my truck. So I was going to go forward a little then back up and straighten out to pull forward and finish parking. Going slow 3-5MPH I pressed the brake and the truck kept going forward, I felt a shake from the brake pedal and then no pressure, straight to the floor, then the brake pedal didn’t return up. i kept pressing/pumping the brake pedal but still felt like there was no power at all. When you released the brake pedal the pedal would not return to the top like normal. So the truck would not stop, it felt like forever, but when the truck did stop it had just come to rest on the fence post left of me, causing a small dent on the, rear passenger, driver side door. This was really scary because I was parking on a ocean pier and I though I was going to go into the fence in front of me and then into the water. I know now that that was most likely not going to happen because of the low speed I was going at but non the less SUPER SCARY. So now I have a dent on my truck and I am also scared to drive the truck because the brakes might not work when I need them too.

My Terrain just started stalling. And it happens a few times a day. This is not safe. I had my daughters with me in their car seats, as I pulled out from a stop sign it just died. I couldnt steer or anything. People coming down the road and I am stuck In the middle of a street until I could put it in park and restart. And then it happens again when in reverse. I thought I accidentally had it in neutral. I restarted it and thought it was fine. It gave a little chugging when I hit the gas pedal but all was fine until I stopped to pull into a parking spot and tried to reverse again to straighten my car. I turned it back on, then it was good enough to get out. when I went back to my car it stalled like 4 times when trying to simply leave the parking lot.

Pcv system plugged up pressure in engine when remove oil cap have cleaned it my self