GMC Complaints

Shortly after purchasing my 2019 GMC Acadia with approximately 52,000 miles, the vehicle displayed a "Steering Assist is Reduced. Drive with Care." warning message and illuminated the check engine light with diagnostic code P0128 00 (Engine Coolant Temperature Below Thermostat Regulating Temperature). I disconnected and reconnected the battery, after which both the warning message and check engine light disappeared. However, the engine coolant temperature gauge then began behaving erratically. On multiple cold starts, the gauge would immediately indicate that the engine was already at normal operating temperature even though the engine had been sitting long enough to be completely cold. This led to a diagnosis of a thermostat and/or engine coolant temperature sensor failure. After researching the issue, I found many other owners reporting the same thermostat and engine coolant temperature sensor failures. I believe this is a widespread defect that should be investigated because incorrect coolant temperature readings can prevent the driver from knowing the true engine temperature and may result in improper engine temperature regulation, overheating, and possible engine damage.

The grill deflector near the hood flew off on the highway … took it to the dealership and they only have a recall for the Chrome 22 gmc sierra grill deflector for the same issue but not the elevation black ..no Warning lamps or lights it flew out of know where no warranty to cover it

TRANSMISSION BEGAN HESITATING AROUND 1800RPM WITH ONLY 92,000 MILES SHOWING ON THE ODOMETER. IT FEELS LIKE A FLUTTER AS THE TRANSMISSION SHIFTS INTO THE NEXT GEAR. I HAVE HEARD THE 2016 YEAR GROUP HAS HAD TRANSMISSION PROBLEMS. BELIEVE A RECALL IS JUSTIFIED.

Blind spot monitor goes off for everything. Engine has chirping noise. Brand new

Transmission is acting funny. Stuck in low gear /not shifting at low speeds. Vibration sometimes at higher speeds when shifting gears. 8 9 10 gears.

I keep going back to get the recall done and they keep telling me they don't have parts .This has gone on for years

There has been 3 different incidents. First incident I was going 45mph merging into 5 lanes of traffic when the back of my driver seat randomly layed down flat and stayed there. I had to get off an exit, get out pull up on front of seat and then it layed back up. 2nd incident I was going about 40mph it folded completely forward and pinned me against the steeling wheel. I had to stop immediately in the middle of the road put my 4 ways on and wiggle and slide out of the car started pulling up on front of seat and was finally able to put it back in place. The 3rd time I was going 20 mph it folded completely forward and pinned against. Had to stop in the middle Of the road again pull up on front of seat. The lumbar setting randomly comes and goes while driving down the road. Took it the garage to be looked at. They weren’t able to figure out why it’s doing what it’s doing but the only option they had was to unplug the module for safety reasons

Bezel flew off on highway. Subsequently, dealer service had to replace both the bezel and grill bc of how it was attached. For some reason the vin was not included in a recall of 70K trucks that were same year make and model as mine. I would like to be included in the recall.

I believe my car should be included in this recall. I've had the dealer check and they say it's nothing wrong with my car. 2020 GMC Acadia Fuel Pump Recall GMC has announced that 2781 vehicles have been affected by a Fuel Pump recall. General Motors LLC (GM) is recalling certain 2020 Buick Enclave, Cadillac XT5, Cadillac XT6, Chevrolet Traverse, and GMC Acadia vehicles. The fuel pump's jet nozzle may have a plastic burr remaining from the manufacturing process, possibly causing a blocked nozzle and an insufficient fuel supply to the engine. Insufficient fuel supply can result in an engine stall without warning, increasing the risk of a crash. 2020 GMC Acadia Recall Fuel Pump GM will notify owners, and dealers will replace the fuel pump module. The recall began November 16, 2020. Owners may contact GMC customer service at 1-888-988-7267, Buick Customer service at 1-866-608-8080, Chevrolet customer service at 1-800-222-1020 or Cadillac customer service at 1-800-458-8006. GM's number for this recall is N202314760.

I am reporting repeated failures involving both the transmission and diesel emissions (DEF) system on my 2021 GMC Sierra 2500HD Denali equipped with the 6.6L Duramax diesel engine and Allison 10-speed automatic transmission. While under warranty, the truck required replacement of the aftertreatment fuel injector and later the Reductant Control Module due to DEF/emissions system failures. General Motors also completed recall-related transmission software updates on the vehicle. At approximately 154,833 miles, the transmission began shifting improperly, set transmission fault codes, and required complete replacement at my expense. Less than 5,000 miles later, the vehicle again experienced a "Service DEF System" warning with multiple diagnostic trouble codes. Repairs required replacement of the DEF tank, DEF heater assembly, and NOx sensor. These repeated failures involve major drivetrain and emissions components on a heavy-duty truck. DEF system failures can place the vehicle into reduced-power (derate) mode, limiting vehicle performance and creating potential safety concerns while driving or towing. I am submitting this complaint so these failures can be documented as part of NHTSA's evaluation of similar vehicles.