2026 head-to-head · Full-Size Pickup
2026 GMC Sierra Diesel vs GMC Sierra EV
MPG, range and what each one really costs you to fuel, from official EPA ratings and recalculated with your own gas and electricity prices.
The 2026 GMC Sierra EV is the cheaper one to run. Driving 15,000 miles a year with $3.70/gal diesel fuel and 18¢/kWh electricity, it costs about $1,336 a year to fuel (68 MPGe), versus $2,220 for the 2026 GMC Sierra Diesel (25 MPG). That's roughly $884 a year, or about $4,418 over five years.
Your numbers
Change these to match your driving and local prices. Every figure and chart on this page updates.
Fuel cost over 10 years
- GMC Sierra Diesel
- GMC Sierra EV
Side by side
| GMC Sierra Diesel | GMC Sierra EV | |
|---|---|---|
| $2,220 | Your annual fuel cost | $1,336 |
| 25 MPG | Combined efficiency | 68 MPGe |
| 23 MPG | City | 75 MPGe |
| 28 MPG | Highway | 61 MPGe |
| — | Electricity use (kWh/100 mi) | 49.5 kWh |
| — | Driving range | 410 mi |
| 402 g/mi | Tailpipe CO₂ (g/mi) | 0 g/mi |
| 5/10 | EPA fuel economy score | 9/10 |
| 4/10 | EPA greenhouse gas score | 10/10 |
| — | Charge time at 240V | 18.6 hrs |
| Diesel | Powertrain | Electric |
| Diesel | Fuel | Electricity |
| 3.0L 6-cyl turbo | Engine / motor | Electric motors (511 kW) |
| 10-speed automatic | Transmission | Single-speed |
| RWD | Drivetrain | 4WD |
✓ marks the better value. EPA scores run 1–10 (10 is best). Volumes come from the EPA interior volume index and aren't published for every body style.
GMC Sierra Diesel vs GMC Sierra EV across model years
- GMC Sierra Diesel
- GMC Sierra EV
Annual fuel cost of the most efficient configuration of each model year, at your prices. Click a point to open that year.
How they differ
Among 21 2026 full-size pickups, the GMC Sierra Diesel ranks 15th and the GMC Sierra EV 4th for lowest fuel cost.
Because the GMC Sierra EV is fully electric, it has no tailpipe emissions and its running cost depends almost entirely on your electricity rate. Cheap overnight home charging widens its advantage over the GMC Sierra Diesel; relying on DC fast chargers can erase it.
Frequently asked questions
Which is more fuel-efficient, the 2026 GMC Sierra Diesel or the 2026 GMC Sierra EV?
Measured by cost to drive, the GMC Sierra EV. The GMC Sierra Diesel is rated 25 MPG combined and the GMC Sierra EV 68 MPGe (EPA, most efficient configuration of each).
How much does it cost to fuel the 2026 GMC Sierra Diesel vs. the GMC Sierra EV per year?
At 15,000 miles a year with $3.70/gal diesel fuel and 18¢/kWh electricity, about $2,220 for the GMC Sierra Diesel and $1,336 for the GMC Sierra EV.
GMC Sierra Diesel vs GMC Sierra EV in other years
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