2021 GMC Acadia problems & reliability
149 owner complaints filed with NHTSA for the 2021 GMC Acadia, alongside 2 safety recall campaigns. Last verified Sep 22, 2026. Complaints are unverified reports submitted by owners to the federal Office of Defects Investigation.
Each complaint is counted once (by NHTSA case number), even when it names several components.
3 complaints report injuries (3 injured).
Federal crash records (FARS 2020–2023): 2021 GMC Acadia vehicles were involved in 23 fatal crashes with 11 occupant deaths. Involvement counts are not adjusted for how many are on the road and do not imply fault or a vehicle defect.
Most reported problems
| Component | Complaints | Share |
|---|---|---|
| Electrical System → | 38 | 26% |
| Engine → | 29 | 19% |
| Fuel/propulsion System → | 24 | 16% |
| Unknown / Other | 20 | 13% |
| Service Brakes → | 18 | 12% |
| Power Train → | 17 | 11% |
| Steering → | 16 | 11% |
| Air Bags | 9 | 6% |
| Back Over Prevention | 7 | 5% |
| Vehicle Speed Control | 7 | 5% |
Component groups as classified by NHTSA. A complaint can name more than one component, so shares may sum to more than 100%.
All 23 reported components →Common symptoms owners describe
Keyword analysis of complaint narratives; one complaint can describe several symptoms.
Mileage when problems occurred
Among the 25 complaints that included a usable odometer reading, the median reported incident mileage was 28,000 miles (middle 50% between 15,000 and 40,000 miles).
Complaints by incident year
What owners report
“While driving home from work the car displayed a "No Fuel" warning, despite having a full tank of gas. Within seconds of the display showing the car stalled out and stopped right in the middle of the road. It would not go into neutral and I had to be towed from the middle of the road to a mechanic close by. Upon…”
Fuel/propulsion System · filed Sep 14, 2026
“On 9/08/2026 I was driving and almost got a wreck but I was able to get out and was going less the 25 and lost control of the vehicle and barely hit the curb and the two air bags went off and I was sent to the hospital”
Air Bags · filed Sep 10, 2026
“While driving the brake vacuum pump exploded leading to catastrophic brake failure. My husband was driving and was able to stand on the brakes to get the car to stop, but had i been driving, I am not strong enough to have stopped the car. I have 3 children with my youngest being 1. If this had happened with me and my…”
Service Brakes · filed Aug 25, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Federal defect investigations
- Rear-View Camera Failure
Preliminary Evaluation PE22006 · opened Jul 22, 2022 · closed Nov 21, 2022 · led to recall 22V709000
Technical service bulletins
846 manufacturer communications (TSBs, service campaigns, warranty extensions) are on file with NHTSA for the 2021 GMC Acadia. The 10 most recent:
This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
PIP4902W · Service Bulletin/Repair Instructions · issued Sep 4, 2026
This Preliminary information communicates to dealer to perform a MEC reset for wireless projection issues
PIC6551C · Service Bulletin/Repair Instructions · issued Aug 20, 2026
PI to help diagnose A/C concern
PIT5099J · Service Bulletin/Repair Instructions · issued Jul 21, 2026
This Preliminary information communicates an issue with an OTA pending message still displayed after an OTA event and how to reset/clear the message.
PIT5966F · Service Bulletin/Repair Instructions · issued Jun 23, 2026
Pi created to provide GM dealers with information on gathering information for projection issue
PIC6423A · Service Bulletin/Repair Instructions · issued May 11, 2026
This Preliminary information communicates to dealer to perform a MEC reset for wireless projection issues
PIC6551B · Service Bulletin/Repair Instructions · issued May 11, 2026
This preliminary information communicates information about how to determine if a wheel and tires size change is available.
PIT3271Q · Service Bulletin/Repair Instructions · issued Apr 1, 2026
Improvements to OnStar functionality.
N25-250552 · Over The Air · issued Mar 21, 2026
This Preliminary information communicates the steps on how to save a GDS2 Session Log and upload to a Technical Assistance Case in CX Connect.
PIP6104 · Service Bulletin/Repair Instructions · issued Mar 9, 2026
This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
PIP4902V · Service Bulletin/Repair Instructions · issued Mar 9, 2026
TSBs are repair guidance manufacturers send to dealers — they are not recalls and repairs are not automatically free. Full documents are available on NHTSA’s site.
Safety recalls
The 2021 GMC Acadia has 2 NHTSA recall campaigns — recall repairs are free at franchised dealers regardless of the vehicle’s age.
Check whether your specific vehicle is affected
Recall campaigns often cover only certain VIN ranges. Enter your VIN on the official NHTSA site to confirm whether your vehicle is included and whether the repair is still open.
Check VIN on NHTSA →Buying a used 2021 GMC Acadia?
- · Decode the seller’s VIN with our free VIN decoder to confirm the exact year, engine and trim.
- · Check for unrepaired recalls by VIN on NHTSA’s official lookup — recall repairs are free.
- · Among complaints with usable mileage, the median reported incident mileage was 28,000 miles. This does not predict when a particular vehicle will develop a problem.