2021 GMC Sierra 1500 owner complaints
Most named: engine
308 of 577 complaints
- Crashes
- 5
- Fires
- 6
- Injuries
- 3
- Deaths
- 0
Owner complaints to the US safety agency (NHTSA), 2021 models.
Components named most often
A complaint can name more than one component.
| Component | Complaints | Share of complaints |
|---|---|---|
| Engine | 308 | 53% |
| Transmission and drivetrain | 140 | 24% |
| Electrical system | 75 | 13% |
| Engine and engine cooling | 49 | 8% |
| Other or not specified | 42 | 7% |
| Fuel system | 37 | 6% |
Complaints by model year
Rivals, 2021
| Rival | Complaints |
|---|---|
| Ford F-150 | 1,277 |
| Chevrolet Silverado 1500 | 830 |
| RAM 1500 | 679 |
| Toyota Tundra | 24 |
| Nissan Frontier | 19 |
| GMC Canyon | 11 |
What this cannot tell you
Counts, not rates. Sales volume differs by model.
Complaints are owner reports, not confirmed defects.
Source: NHTSA complaints data (api.nhtsa.gov), public domain. Collected 2026-10-05.
- Two or more sources agree
- One source
- Model-level or estimate
- Sources differ