2025 GMC Sierra 4WD vs 2026 Mercedes-Benz SL680 Maybach
| EPA figure | 2025 GMC Sierra 4WD | 2026 Mercedes-Benz SL680 Maybach |
|---|---|---|
| Model year | 2025 | 2026 |
| Body · drive | Pickup · 4-Wheel Drive · Gas | Minicompact · All-Wheel Drive · Gas |
| Combined MPG | 16 | 16 |
| City / highway MPG | 15 / 19 | 13 / 20 |
| Fuel a year | $5,150 | $5,150 |
| Tailpipe CO₂ (g/mi) | 539 | 558 |
| Engine | 6.2 L 8-cyl | 4.0 L 8-cyl turbo |
| Transmission | Automatic 10-spd | Automatic 9-spd |
▲ marks the better official figure on that line: more range, MPG or MPGe; less fuel cost or CO₂. From fueleconomy.gov.