GMC Sierra with Sport Mode MPG by year
EPA combined, city, and highway gas mileage for every GMC Sierra with Sport Mode model year.
| Year | Combined | City | Highway |
|---|---|---|---|
| 2026 | 17–19 | 16 | 20 |
EPA combined, city, and highway gas mileage for every GMC Sierra with Sport Mode model year.
| Year | Combined | City | Highway |
|---|---|---|---|
| 2026 | 17–19 | 16 | 20 |