2021 GMC Terrain problems by component
34 owner complaints filed with NHTSA for the 2021 GMC Terrain, grouped by the component owners reported. Each component links to a detailed breakdown with mileage, severity and owner reports.
| Component | Complaints | Share | Median mileage |
|---|---|---|---|
| Engine | 8 | 24% | — |
| Power Train | 8 | 24% | — |
| Service Brakes | 8 | 24% | — |
| Electrical System | 7 | 21% | — |
| Forward Collision Avoidance | 3 | 9% | — |
| Engine and Engine Cooling | 2 | 6% | — |
| Fuel/propulsion System | 2 | 6% | — |
| Fuel System, Gasoline | 2 | 6% | — |
| Lane Departure | 2 | 6% | — |
| Suspension | 2 | 6% | — |
| Air Bags | 1 | 3% | — |
| Child Seat | 1 | 3% | — |
| Steering | 1 | 3% | — |
| Vehicle Speed Control | 1 | 3% | — |
| Visibility/wiper | 1 | 3% | — |
Component groups as classified by NHTSA. A complaint can name more than one component, so shares may sum to more than 100%.