2021 GMC Acadia power train problems
17 owner complaints filed with NHTSA name the power train on the 2021 GMC Acadia — 12% of all complaints for this model year.
What owners report
“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
“Had vehicles looked at twice and serviced once for the transmission slipping. No issues were found when looked at and light was deleted. Took to another mechanic who drained and refilled transmission. Transmission still slips after service. This happens at acceleration and continues til 3rd gears…”
filed Feb 10, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Power Train problems in other Acadia years
| Year | Reports | Share |
|---|---|---|
| 2025 Acadia | 4 | 7% |
| 2024 Acadia | 7 | 13% |
| 2023 Acadia | 12 | 31% |
| 2022 Acadia | 4 | 9% |
| 2020 Acadia | 21 | 22% |
| 2019 Acadia | 152 | 40% |
| 2018 Acadia | 162 | 42% |
| 2017 Acadia | 234 | 33% |
| 2016 Acadia | 20 | 9% |
| 2015 Acadia | 17 | 7% |
| 2014 Acadia | 34 | 7% |
| 2013 Acadia | 27 | 20% |
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.