2026 GMC Terrain problems by component
29 owner complaints filed with NHTSA for the 2026 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 |
|---|---|---|---|
| Forward Collision Avoidance | 5 | 17% | — |
| Power Train | 5 | 17% | — |
| Electrical System | 4 | 14% | — |
| Wheels | 4 | 14% | — |
| Service Brakes | 3 | 10% | — |
| Steering | 3 | 10% | — |
| Suspension | 3 | 10% | — |
| Structure | 2 | 7% | — |
| Back Over Prevention | 1 | 3% | — |
| Engine | 1 | 3% | — |
| Lane Departure | 1 | 3% | — |
| Latches/locks/linkages | 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%.