2026 head-to-head · Full-Size Pickup
2026 Chevrolet Silverado Diesel vs GMC Sierra Diesel
MPG, range and what each one really costs you to fuel, from official EPA ratings and recalculated with your own gas and electricity prices.
On fuel costs these two are nearly tied. Driving 15,000 miles a year with $3.70/gal diesel fuel, the most efficient 2026 Chevrolet Silverado Diesel (25 MPG) costs about $2,220 a year to fuel and the 2026 GMC Sierra Diesel (25 MPG) about $2,220.
Your numbers
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Fuel cost over 10 years
- Chevrolet Silverado Diesel
- GMC Sierra Diesel
Side by side
| Chevrolet Silverado Diesel | GMC Sierra Diesel | |
|---|---|---|
| $2,220 | Your annual fuel cost | $2,220 |
| 25 MPG | Combined efficiency | 25 MPG |
| 23 MPG | City | 23 MPG |
| 28 MPG | Highway | 28 MPG |
| 402 g/mi | Tailpipe CO₂ (g/mi) | 402 g/mi |
| 5/10 | EPA fuel economy score | 5/10 |
| 4/10 | EPA greenhouse gas score | 4/10 |
| Diesel | Powertrain | Diesel |
| Diesel | Fuel | Diesel |
| 3.0L 6-cyl turbo | Engine / motor | 3.0L 6-cyl turbo |
| 10-speed automatic | Transmission | 10-speed automatic |
| RWD | Drivetrain | RWD |
✓ 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.
Chevrolet Silverado Diesel vs GMC Sierra Diesel across model years
- Chevrolet Silverado Diesel
- GMC Sierra Diesel
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 Chevrolet Silverado Diesel ranks 16th and the GMC Sierra Diesel 15th for lowest fuel cost.
Frequently asked questions
How much does it cost to fuel the 2026 Chevrolet Silverado Diesel vs. the GMC Sierra Diesel per year?
At 15,000 miles a year with $3.70/gal diesel fuel, about $2,220 for the Chevrolet Silverado Diesel and $2,220 for the GMC Sierra Diesel.
Chevrolet Silverado Diesel vs GMC Sierra Diesel in other years
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