GMC Acadia Complaints (2021)

147 consumer complaints on file.

#11716760February 9, 2026
ENGINE, ENGINE AND ENGINE COOLING:ENGINE:CRANK/CAMSHAFT POSITION SENSOR
The contact owns a 2021 GMC Acadia. The contact stated while driving at an undisclosed speed, the check engine warning light illuminated and DTC: P04FB; was displayed. The vehicle was taken to the dealer where it was diagnosed with moisture of the crank case. The vehicle was repaired. The contact stated that the failure was a quick fix and was covered under the warranty. The contact stated that the failure had occurred several times and was covered under warranty. The contact was informed that there was no fix for the failure. The manufacturer was not made aware of the failure. The failure mileage was approximately 37,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11715591February 4, 2026
ELECTRICAL SYSTEM:INSTRUMENT PANEL:SPEEDOMETER/ODOMETER
Odometer Fraud. The contact purchased a 2021 GMC Acadia. The contact discovered a mileage discrepancy after the purchase. The vehicle was a dealer sale. At the time of purchase, the mileage was approximately 29,000. The contact attempted to trade in the vehicle, and the purchasing dealer checked the VIN and retrieved a Carfax Report. The Carfax Report indicated that the mileage on the Title on 11/04/2024 was 58,000; however, on 02/04/2025, the mileage was 28,000, and the vehicle had been in an accident in the past.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11712579January 21, 2026
ENGINE
Been happening for a year and a half. Muffler is very loud and rattles constantly. Getting worse over time. There is a current recall but my vin isn’t included even though my car is having the same issue.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11712434January 21, 2026
FUEL SYSTEM, GASOLINE
The contact owns a 2021 GMC Acadia. The contact stated that while the vehicle was parked, the vehicle started, and the contact exited the vehicle and ran into the house for a while. The contact stated that while reentering the vehicle, the contact noticed that the check engine warning light was illuminated. The contact was employed by an independent mechanic, and the vehicle was driven to the place of employment. The independent mechanic attached the mobile diagnostic tester to the vehicle and retrieved DTC: P023F, which indicated fuel pump secondary circuit failure. The contact was advised that the fuel pump module needed to be replaced. The vehicle was not repaired. The vehicle was not repaired. The contact referenced NHTSA Campaign Number: 21V422000 (Fuel System, Gasoline); however, the VIN was not associated. The manufacturer was made aware of the failure but provided no assistance. The contact was advised to contact the NHTSA Hotline to report the failure. The failure mileage was approximately 78,200.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11709819January 9, 2026
VEHICLE SPEED CONTROL, ELECTRICAL SYSTEM
The electronic dashboard goes black while driving. I was driving to work on the highway at highway speeds and the entire electronic dashboard went black including the hud display and the radio screen. The radio screen turned back on and auto reconnected to my phone and android auto. I was able to safely get to an exit and park, turn off the car and restart and the dash did come back on to then go black about 5 minutes later this time the hud stayed on and I was able to get to work where the car sat off for 8 hrs , when leaving work the dash stayed on. The radio screen would turn off randomly and unable to connect to a programmed cell phone via Bluetooth or data cable. I brought the vehicle in for a service and this issue plus the concern of the transmission shuddering. The dealership found the problem and both the dashboard and radio needed service updates and both were charged to fix. A service update should not be charged for the dash as you have no speedometer when it goes out. There was no warning or alert that the dash or radio needed an update.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11709573January 8, 2026
POWER TRAIN, LANE DEPARTURE: ASSIST
Cars is not keeping track of temperature showing engine is cold after 30 minutes of driving, fan runs for extended periods of time after shutting off, check engine light comes on, steering assist alert comes in screen. All of this happens in a cycle. To stop it the battery has to be unplugged and reconnected resetting the car and everything goes back to being fine for a short period of time.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11708654January 4, 2026
UNKNOWN OR OTHER
My car suddenly out of the blue started overheating. By the time I could get stopped safely and turn the car off the engine fan kept running to try to cool it down. I’ve never had any issues with my car. It only has 47,000 miles on it. I now have to have it towed to a mechanic shop to get diagnosed, but I’m hearing that it’s probably a thermostat and that the GMC Acadia’s are famous for that being a problem. I’m not sure why GMC would not do a recall on this part! this is an extremely expensive fix.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11701600November 25, 2025
ELECTRICAL SYSTEM
The infotainment center/and On Star alert systems ( crash detections / SOS ) No access to anything in the infotainments center along with most of the safety setting not alerting due to and over the air update failure. yes is available for inspection upon request. all On star safety features are not working if a crash were to happen i would not be able to get help if i was injured. Yes and it is ongoing. BY a GMC certified dealer. No.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11701422November 25, 2025
ENGINE
VEHICLE'S ENGINE INCURRED COOLANT TEMPERATURE ISSUES, SET DTC CODE, AND COOLING FAN RAN AFTER ENGINE WAS TURNED OFF. DEALER DIAGNOSED AS THERMOSTAT FAILURE AND COMPLETED REPAIRS. DEALER CHECKED AND FOUND NO SERVICE ASSISTANCE FOR REPAIR EVEN THOUGH THERE WAS A BACK ORDER FOR REPLACEMENT PARTS AND WAS SECURED THROUGH DEALER IN DETROIT CURRENT NHTSA ID NUMBER 110243390 / MFG COMMUNICATION # N252508350 REFERRING TO 3.6 V-6 ENGINE. GMC DECLINED ANY MONETARY ASSISTANCE TOWARDS REPAIRS WITH 76278 MILES I ALSO OWN A 2020 CHEVROLET BLAZER WITH A 3.6 V-6 ENGINE THAT EXPERIENCED SAME FAILURE PAID $400 DEDUCTABLE TOWARD REPAIR
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11701260November 24, 2025
UNKNOWN OR OTHER
Getting a pop up that says “steering assist reduced”. Temp gauge drops completely. AC won’t work and fan kicks on
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11701250November 24, 2025
STEERING, UNKNOWN OR OTHER
"STEERING ASSIST REDUCED. DRIVE WITH CARE" message, fan runs nonstop, even after the vehicle is off. Sounds like a plane taking off. This seems to be EXTREMELY common after doing my research. Please consider turning this into a recall!
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11701173November 24, 2025
STEERING, VEHICLE SPEED CONTROL, ENGINE
For the 3rd time of ownership the cooling fan stays on after vehicle is turned off and the display “steering assist is reduced, drive with caution”.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11701121November 23, 2025
STEERING, POWER TRAIN, ENGINE
The thermostat failed which cause the steering system to fail and car to not read temperature
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11700332November 19, 2025
FUEL SYSTEM, GASOLINE, ENGINE
The contact owns a 2021 GMC Acadia. The contact stated that while his wife was driving at an undisclosed speed, the vehicle inadvertently lost motive power. The driver was able to coast to the shoulder of the roadway, where the vehicle failed to restart. The check engine warning light was illuminated. The vehicle was towed to an independent mechanic, who diagnosed a failure with the fuel pump control module. The vehicle was repaired. The manufacturer was notified of the failure but provided no assistance. The failure mileage was 36,970.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11699969November 17, 2025
ENGINE
GM need to be looked at for faulty Thermostats being put into vehicles. 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 this problem. Customers are getting charged alot of money for the repair. To me this is a defective thermostat on GM and needs to be addressed
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11699678November 16, 2025
SERVICE BRAKES
ABS Modulator failed leaking oil. Loss of braking Repair service found the same problem. Part was scrapped.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11699159November 13, 2025
STEERING, ELECTRICAL SYSTEM
Often times, on the heads-up display I would get "Steering Assist is Reduced Drive with Care" and my temp gauge will stop working and when I stop, my fan continues to run until I disconnect the battery for 20 secs.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11698177November 7, 2025
FUEL SYSTEM, GASOLINE
The contact owns a 2021 GMC Acadia. 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 contact stated while attempting to start the vehicle, the vehicle failed to start as intended. The contact stated that the failure had nearly caused the vehicle to be run over by a tractor trailer. The contact's wife and three minor children were also occupying the vehicle during the failure. The contact stated that he and his family could have been killed due to the failure. The vehicle was towed to the dealer, where it was diagnosed with fuel pump power control module failure. The contact was informed that the fuel pump power control module needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure and a case was filed. The contact related the failure to an unknown recall; however, the VIN was not included in the recall. The failure mileage was approximately 35,500.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11698037November 6, 2025
POWER TRAIN
Transmission feels like it’s slipping, almost like a jerky shift from any stop, seems like a common issue and should be recalled!
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11697020November 2, 2025
ELECTRICAL SYSTEM, ENGINE, STEERING
I was driving home and about 10 minutes into my drive I got a notification about my steering assistance being disabled. When I arrived home about 10 minutes or so later and went to shut my car off I noticed that a very loud fan sound from the hood of my vehicle began roaring. I restarted my car and it went away. I looked at my temperature gauge and it was all the way on C. I tried shutting my car off again and the loud electrical fan sound picked right back up again. I stayed in my vehicle while it was turned off waiting to see if it would stop while trying to call for answers. I couldn’t risk having a dead battery for work tomorrow morning. After what was about 6-7 minutes the electrical fan finally shut off. Turns out my aunt JUST had this exact same issue with her 2021 GMC Acadia as well. According to Reddit MANY people are having this issue yet there is still no recall for this problem. My car is only at 85K miles, has always been dealership maintained and has never had any issues like this until now. If this is a wide spread make and model issue a recall should have been issued.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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