2015 GMC Terrain engine problems
80 owner complaints filed with NHTSA name the engine on the 2015 GMC Terrain — 27% of all complaints for this model year.
What owners report
“I am submitting this complaint regarding the engine timing chain failure in my 2015 GMC Terrain because I believe it presents a serious safety hazard. Before the failure, the vehicle began experiencing intermittent symptoms, including engine jerking, shaking, rough operation, abnormal engine…”
filed Jul 22, 2026
“Oil consumption, causing high pressure furl pump to clog. It also causes catalytic converter to clog. No warning of oil loss. Causing stalling out while driving. Caused the engine to seize. New engine replaced and still same problem s”
filed Apr 10, 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 | 4% |
| 2024 Terrain | 11 | 23% |
| 2023 Terrain | 13 | 36% |
| 2022 Terrain | 10 | 21% |
| 2021 Terrain | 8 | 24% |
| 2020 Terrain | 55 | 30% |
| 2019 Terrain | 63 | 36% |
| 2018 Terrain | 51 | 24% |
| 2017 Terrain | 77 | 58% |
| 2016 Terrain | 45 | 30% |
| 2014 Terrain | 123 | 42% |
| 2013 Terrain | 197 | 54% |
Other reported problem areas on the 2015 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.