2023 GMC Terrain engine problems
14 owner complaints filed with NHTSA name the engine on the 2023 GMC Terrain — 37% of all complaints for this model year.
What owners report
“adaptive cruise disengaging alert on dash- no cars or weather conditions to induce this. loss of power and bucking on highway( near accident caused) catostostrophic sudden loss of power engine/transmission failure while mechanic driving resulting in car towed back to dealer. loss of power multiple…”
filed Aug 5, 2026
“The contact owns a 2023 GMC Terrain. The contact stated that while driving at various speeds, the vehicle unexpectedly decelerated and failed to properly accelerate. The service transmission and service fuel management system messages were displayed, and the check engine warning light was flashing…”
filed Aug 5, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Engine problems in other Terrain years
| Year | Reports | Share |
|---|---|---|
| 2026 Terrain | 1 | 3% |
| 2024 Terrain | 11 | 22% |
| 2022 Terrain | 10 | 17% |
| 2021 Terrain | 9 | 26% |
| 2020 Terrain | 57 | 29% |
| 2019 Terrain | 68 | 37% |
| 2018 Terrain | 53 | 24% |
| 2017 Terrain | 77 | 58% |
| 2016 Terrain | 46 | 30% |
| 2015 Terrain | 80 | 27% |
| 2014 Terrain | 123 | 42% |
| 2013 Terrain | 197 | 54% |
Other reported problem areas on the 2023 GMC Terrain
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.