GMC Sierra EV 20-mod battery, 19kW 15-mode charger Fuel Economy History
MPG by year — EPA official data.
Best MPG Year
2026
64 MPG combined
Latest Model
2026
64 MPG combined
| Year | Engine | City | Hwy | Combined | Fuel Cost/yr | |
|---|---|---|---|---|---|---|
| 2026 | Electricity EV | 69 | 59 | 64 | $1,200 | Details → |