GMC Complaints

Transfercase was casuing the Yukon to serge when in auto mode. No codes warning lights were presented. The dealer did not find any codes but when the transfer case was removed the oil was drained to which metal shavings were found in the oil. After getting the Yukon back the transmission began to exibit the same type of issues. Currently the Yukon is back in the shop.

High pressure fuel pump housing failed and filled the cabin with fumes. Rendered the the Yukon unsafe to drive with fuel flooding the engine compartment. Took the dealer 57 days to repair the car. No warning lights, only indication was the fumes in the cabin.

While driving 65mph in my 2024 GMC Sierra Denali Ultimate on Interstate 270 in Hilliard, Ohio my chrome grill deflector just flew off and hit my windshield. It then went over my truck and almost caused a major accident with the cars and semi-trucks behind me. I was lucky to maintain control of my own vehicle! It appears to me that the mounting fractured and it looks like manufacturing defect. Looks like the same issues recalled in 2022 year models. How many have to die before GM fixes this issue? They now want $1,500 for a new grill on my 2024 truck.

When my android auto does not connect, it essentially disables the whole infotainment system which is incredibly distracting and dangerous while driving. I am requesting that this be fixed so that I can still use some of the infotainment system but they are redusing to to do anything to fix the issue. The dealer has advised that they are unable to fix the issue because it is software related but yet the software team is saying it is a dealer issue. Please help me get a resolution to this issue!

I was driving a dirt road in snow went to make a right turn onto road at a downhill angle and the airbags deployed on the side curtains all the way from front to rear

We purchased our 2024 Acadia in June 2025. Since we have had the vehicle, it has been in the shop going on 6 times. First the sunroof seal came off, then the antenna cover fell off, the driver side rear panel had to be replaced because it was coming off. Once all this was done then the vehicle started leaking transmission fluid, took it to the dealer to get fixed, once we get it back the coolant starts leaking from the radiator hose, took it in to get repaired, now there is knocking noise coming from the engine/hood. Every time we take it in to get repaired a new problem pops up. We purchased the vehicle to have a safe way to get our kids around and it has been nothing but a headache and run around from the dealership. GMC really needs to resolve this issue. Parts seem to be on never-ending backorder with no ETA.

Purchased NEW 2026 GMC Terrain Elevation, and it came with NO User Manual. I was told by the dealership (Al Serra GMC in Grand Blanc Michigan that i could either purchase one for $50.00+ dollars, PLUS TAX & $25.00 SHIPPING, or d/l it via the infotainment system in the car, WHICH DID NOT WORK! Talk about [XXX] A VIETNAM VET!!! We are both [XXX] old & need a manual, so bought a reproduction of the original via eBay for $50.00. At least GM could reimburse the cost of the manual… INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

A few weeks ago my adaptive cruise stopped working, as well as the automatic high beam system (not sure the technical name). As there was a warning light displayed, I brought it into the dealership to have them check it out. The technician jumped in really quick, made some changes within the control panel, and the light came off. As I drove out and tried to use the adaptive cruise control, it didn't work and I almost went into the back of a truck. That all being said, I brought it back into the dealer last week for them to diagnose the problem as a failed front windshield camera. I find it hard to believe that this camera can fail at 50k miles, and the repair with parts and labor costing approximately $1000. This is an advanced system designed to improve the driver experience and heavily marketed. Considering this is tied to safety in some capacity, shouldn't GM cover this repair? I quickly googled the issue and found others have had the same failure. The camera system combined with the control panel covers so many applications, I would be concerned about other issues with the truck. Not to mention the massive recall of my L87 engine and water pump failure that I have also dealt with. I appreciate you taking the time to read my rant. Not sure if this will do anything, but it would be nice to have some sort of relief from the OEM due to the issues I have already experienced owning this truck.

The 10L80 transmission had a catastrophic failure just outside of the GM warranty. At under 70K miles the pump gears came apart and sent metallic debris throughout the entire transmission and exhaust gaskets converter next to the transmission. These will need to be replaced. I have found multiple cases online with this 10L80 transmission where there has been significant problems with these transmissions blowing up or even causing momentary lockup with the wheels. This transmission is notorious for problems but has not yet been recalled. My mom and nephews were in the vehicle when it broke down putting their safety at risk on the the highway. This problem was confirmed by the GMC dealership here in Ruston, LA. The dealership has done the mechanical inspection. The engine started making an extremely loud noise and the warning lights did not even come on until I attempted to start it later after the breakdown.

engine failure from the connecting rod and/or crankshaft. There is a current recall for this and my vehicle should be a part of it. I broke down on the side of a highway and had the vehicle towed to GMC dealership. There are now warning lights on with code P0016 and P0324