2021 GMC Sierra 2WD vs 2021 GMC Sierra 4WD
| EPA figure | 2021 GMC Sierra 2WD | 2021 GMC Sierra 4WD |
|---|---|---|
| Model year | 2021 | 2021 |
| Body · drive | Pickup · Rear-Wheel Drive · Gas | Pickup · 4-Wheel Drive · Gas |
| Combined MPG | 21 | 17 |
| City / highway MPG | 20 / 23 | 15 / 20 |
| Fuel a year | $3,200 | $3,950 |
| Tailpipe CO₂ (g/mi) | 422 | 526 |
| Engine | 2.7 L 4-cyl turbo | 5.3 L 8-cyl |
| Transmission | Automatic 8-spd | Automatic 6-spd |
▲ marks the better official figure on that line: more range, MPG or MPGe; less fuel cost or CO₂. From fueleconomy.gov.