2021 Gmc Acadia Recalls, Issues & Maintenance

“Car was parked overnight in my garage and in the morning it would turn over, but not start. Had to have it towed to my GMC dealer, but had great difficulty moving the car out of the garage because the transmission remains in PARK if the engine is not running”

“The contact stated while driving 75 MPH, the check engine warning light illuminated. Additionally, the accelerator pedal was depressed, but the vehicle failed to accelerate as intended. The vehicle was driven to the shoulder of the road”

“The fuel pump module has been replaced 3 times. The first 2 times I was able to drive it to dealership for repairs. The last time on march 29, I was crossing a very busy highway and my vehicle just stopped without warning”

“While driving the message "steering assist is reduced " You get to a safe place and shut you car off and the fan still runs. After speaking with my dealer today, he said he has done 7 in last week. And if you look online, everyone especially Acadia models is having…”

“The vehicle repeatedly experiences problems related to the coolant temperature sensor and thermostat. During these episodes, the engine cooling fan continues running even after the vehicle has been turned off, sometimes for an extended period of time”

“While driving, error popped up stating steering assist is reduced; drive with caution. Heat was no longer working. Engine temp was reading cold even though vehicle had been running for half hour and temp outside was 65 F”

“My brake pedal got stiff when I was driving. I had zero control of my brakes. I was informed by a GMC dealership that my BRAKE BOOSTER blew up causing my brakes to stop working and metal shrapnel to be sent into my engine. My 2021 vehicle is a complete loss”

“I was driving and all of a sudden my break pedal was inoperable. It was stiff and unable to be used. Luckily I was only going 40 MPH. I pulled into a parking lot and my car started shaking and apparently the metal parts from the vacuum pump blew into my engine”

“On March 27, 2026, I experienced a complete brake failure while driving a 2021 GMC Acadia in a school zone at approximately 3:00 PM. When I pressed the brake pedal, the vehicle did not respond. I attempted multiple times, including using the emergency brake”

“While driving down the interstate at 70mph+, the instrument panel went black and restarted multiple times. The car continued to stay at a sustained speed, but I was unable to control anything or see how fast I was going”

“Electronic dashboard failure. Entire instrument panel randomly shuts off while driving, including speedometer and all gauges. Driver then has to wait for system to reboot itself before it begins working again”

“Instrument cluster malfunction. Entire instrument cluster blacking out every 60 seconds, then rebooting nonstop while driving. While this was occurring, none of the advanced driver assistance systems functioned, nor did the speedometer or other gauges”

“The contact stated that while driving approximately 30-60 MPH, the vehicle started shuddering inadvertently. There were no warning lights illuminated. The contact stated that he continued to drive the vehicle. The contact stated that…”

“This is a very known issue that has been reoccurring with GMC Acadia. The torque converter slipping. That cost alone is over $7.000 for the transmission. I am still making monthly payments for my 2021 Acadia”

“Transmission or torque converter. *Vehicle shuddering or shaking at low speeds or when shifting. *Studders while trying to drive fromstop. Can casue accident. *No check engine lights or any warnings prior to…”

“VEHICLE PURCHASED NEW MID-MARCH 2021 AND IN LESS THAN 30 DAYS THE REAR BACK-UP CAMERA STOPPED WORKING INTERMITTENTLY. THIS HAS OCCURRED SEVERAL TIMES AND THE VEHICLE IS CURRENTLY AT THE DEALER BEING DIAGNOSED”

“Rear view camera won’t display when out in reverse. Also, when the camera does come on, it’ll flicker off and on”

“The contact stated that while reversing, the back-over prevention camera failed to display an image. The vehicle was taken to the local dealer who diagnosed that the back-over prevention camera was faulty and needed to be replaced”

“Engine exhaust makes vibrating noise similar to a leaf blower under acceleration. TSB issued due to common issue and GM refuses to recall or fix. Broken baffle/weld inside of front muffler/resonator on exhaust system under front passenger compartment”

“I have a really loud buzz & rattle noise. I can feel vibration on the passenger floor board real bad. The loud noise usually around 2,000-2,500 rpms. I have 39,000 miles on my car”

“The contact stated that while driving, he heard a loud rattling noise coming from the exhaust. The contact then stated that the RPM’s increased and the rattling noise became louder. No warning light was illuminated”

“WE BOUGHT OUR CAR ON 11/7/2020 ,2 DAYS AFTER STARTING THE MESSAGES APPEAR ON THE SCREEN (SERVICE SAFETY RESTRAINT SYSTEM) CAR AND ON MY PHONE, THIS ALWAYS HAPPEN WHEN IN MOTION, ON A CITY OR HIGHWAY DOESN'T MATTER WHERE YOU'RE DRIVING”

“No matter what speed I am driving at or whether or not there is a passenger my service safety restraint system light comes on randomly and shuts off randomly. I called the dealership and they brushed it off saying it just means the airbag wont deploy”

“October 2021 warning light service service seat restraint system. Schumacher Lake Park FL replaced SIR module. Mileage 3741 Took 2 weeks to repair. October 2022 Warning light service seat restraint system. Mileage 7180”