2021 GMC Acadia electrical system problems
37 owner complaints filed with NHTSA name the electrical system on the 2021 GMC Acadia — 25% of all complaints for this model year.
What owners report
“Display suddenly says "Steering assistance reduced, drive with care" Temp gauge goes to C and stays there. Radiator fans speed up and stay on after the car has been turned off. Dealer unable to find a diagnostic code for the problem.”
filed May 30, 2026
“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. With rising cost above the board GMC could have resolved this issue before releasing this…”
filed May 12, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Electrical System problems in other Acadia years
| Year | Reports | Share |
|---|---|---|
| 2025 Acadia | 4 | 7% |
| 2024 Acadia | 8 | 15% |
| 2023 Acadia | 9 | 23% |
| 2022 Acadia | 14 | 30% |
| 2020 Acadia | 27 | 28% |
| 2019 Acadia | 103 | 27% |
| 2018 Acadia | 108 | 28% |
| 2017 Acadia | 193 | 28% |
| 2016 Acadia | 25 | 11% |
| 2015 Acadia | 27 | 11% |
| 2014 Acadia | 90 | 20% |
| 2013 Acadia | 38 | 28% |
Other reported problem areas on the 2021 GMC Acadia
Counts are unique NHTSA complaints naming this component group. Complaints are unverified owner reports; mileage is computed only from complaints that included a usable odometer reading.