2020 GMC Terrain vs 2021 GMC Terrain
Complaints, recalls, TSBs, investigations and safety ratings side by side, from official federal data. Last verified Sep 21, 2026. Raw complaint counts are not adjusted for sales volume.
| Metric | 2020 GMC Terrain | 2021 GMC Terrain |
|---|---|---|
| NHTSA complaints | 195 | 35 |
| Recall campaigns | 2 | 2 |
| Service bulletins (TSBs) | 843 | 695 |
| Investigations | 0 | 0 |
| Crash reports | 7 | 4 |
| Fire reports | 2 | 0 |
| NCAP overall rating | 5/5 | 5/5 |
| EPA MPG (combined) | 23–27 | 26–27 |
| Median reported incident mileage | 49,276 mi | — |
Reported problems side by side
| Component | GMC Terrain | GMC Terrain |
|---|---|---|
| Service Brakes | 63 | 8 |
| Engine | 57 | 9 |
| Power Train | 27 | 8 |
| Electrical System | 27 | 7 |
| Fuel/propulsion System | 25 | 2 |
| Vehicle Speed Control | 11 | 1 |
| Forward Collision Avoidance | 8 | 3 |
| Fuel System, Gasoline | 6 | 2 |
Symptoms owners describe
| Check engine light | 28 | 5 |
| Brake problems | 22 | 0 |
| Stalling | 17 | 0 |
| Loss of power | 11 | 0 |
| Vibration / shaking | 9 | 7 |
2020 GMC Terrain
2021 GMC Terrain
Compare all GMC Terrain vs GMC Terrain years →
Method. Complaints are unique NHTSA reports. A vehicle that sold more units will naturally accumulate more complaints — use shares and read the underlying reports before drawing conclusions.