2021 GMC Sierra 3500 problems by component
20 owner complaints filed with NHTSA for the 2021 GMC Sierra 3500, grouped by the component owners reported. Each component links to a detailed breakdown with mileage, severity and owner reports.
| Component | Complaints | Share | Median mileage |
|---|---|---|---|
| Power Train | 7 | 35% | — |
| Service Brakes | 5 | 25% | — |
| Electrical System | 4 | 20% | — |
| Engine | 3 | 15% | — |
| Fuel/propulsion System | 2 | 10% | — |
| Back Over Prevention | 1 | 5% | — |
| Structure | 1 | 5% | — |
| Tires | 1 | 5% | — |
| Visibility | 1 | 5% | — |
Component groups as classified by NHTSA. A complaint can name more than one component, so shares may sum to more than 100%.