GMC · 2025–2026 · Electric
GMC Sierra EV MPG by year
The EPA has rated 2 model years of the GMC Sierra EV, from 2025 to 2026. The most fuel-efficient year is the 2026, at 68 MPGe combined in its best configuration. The best 2026 model is 6% more efficient than the best 2025 model (68 vs. 64 MPGe). The 2026 model is 9% less efficient than the median full-size pickup that year (68 vs. 74.5 MPGe).
Combined MPGe by model year
- Sierra EV, most efficient version
- Range across configurations
- Class median
Shaded band: range across that year's configurations. Class median: same-year models in the same class, rated in MPGe. Click a point to open that model year; the table below lists every value.
Every Sierra EV model year
| Year | Type | Best combined | City / Hwy | Class median | Range | Configs | Fuel / yr |
|---|---|---|---|---|---|---|---|
| 2026 | Electric | 68 MPGe lowest 64 |
75 / 61 | 74.5 | 410 mi | 3 | $1,336 |
| 2025 | Electric | 64 MPGe | 70 / 59 | 72 | 390 mi | 1 | $1,415 |
Fuel cost uses today's default prices for every year so model years compare like for like. Sort any column.
Compare Sierra EV model years
See how much a newer Sierra EV would save over an older one.
Models similar to the GMC Sierra EV
Other GMC Sierra versions
Frequently asked questions
Which GMC Sierra EV year has the best fuel economy?
The 2026 GMC Sierra EV, rated up to 68 MPGe combined. At 15,000 miles a year with 18¢/kWh electricity, that works out to about $1,336 a year.
Which GMC Sierra EV year has the worst fuel economy?
The 2025 model, whose most efficient version is rated 64 MPGe combined (about $1,415 a year to fuel).
What is the fuel economy of the latest GMC Sierra EV?
The 2026 GMC Sierra EV is rated up to 68 MPGe combined.