GMC Sierra 2WD Fuel Economy History
MPG by year — EPA official data.
Best MPG Year
2025
26 MPG combined
Latest Model
2026
25 MPG combined
| Year | Engine | City | Hwy | Combined | Fuel Cost/yr | |
|---|---|---|---|---|---|---|
| 2026 | Diesel Diesel | 23 | 28 | 25 | $3,400 | Details → |
| 2025 | Diesel Diesel | 23 | 29 | 26 | $3,250 | Details → |
| 2024 | Diesel Diesel | 23 | 29 | 25 | $3,400 | Details → |
| 2023 | Diesel Diesel | 24 | 29 | 26 | $3,250 | Details → |
| 2022 | Diesel Diesel | 23 | 30 | 26 | $3,250 | Details → |
| 2021 | Diesel Diesel | 23 | 30 | 26 | $3,250 | Details → |
| 2020 | Diesel Diesel | 23 | 30 | 26 | $3,250 | Details → |