2020 GMC Sierra 3500 vs 2021 GMC Sierra 3500
Complaints, recalls, TSBs, investigations and safety ratings side by side, from official federal data. Last verified Aug 8, 2026. Raw complaint counts are not adjusted for sales volume.
| Metric | 2020 GMC Sierra 3500 | 2021 GMC Sierra 3500 |
|---|---|---|
| NHTSA complaints | 51 | 20 |
| Recall campaigns | 8 | 5 |
| Service bulletins (TSBs) | 901 | 836 |
| Investigations | 1 | 1 |
| Crash reports | 4 | 0 |
| Fire reports | 2 | 0 |
| NCAP overall rating | — | — |
| EPA MPG (combined) | — | — |
| Median reported incident mileage | — | — |
Reported problems side by side
| Component | GMC Sierra 3500 | GMC Sierra 3500 |
|---|---|---|
| Power Train | 19 | 7 |
| Electrical System | 9 | 4 |
| Service Brakes | 7 | 5 |
| Engine | 6 | 3 |
| Fuel/propulsion System | 5 | 2 |
| Structure | 5 | 1 |
| Tires | 4 | 1 |
| Visibility | 1 | 1 |
2020 GMC Sierra 3500
2021 GMC Sierra 3500
Compare all GMC Sierra 3500 vs GMC Sierra 3500 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.