2021 head-to-head · Full-Size Pickup
2021 Chevrolet Silverado Diesel vs GMC Sierra
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 2021 Chevrolet Silverado Diesel is the cheaper one to run. Driving 15,000 miles a year with $3.70/gal diesel fuel and $3.10/gal regular gas, it costs about $2,056 a year to fuel (27 MPG), versus $2,214 for the 2021 GMC Sierra (21 MPG). That's roughly $159 a year, or about $794 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
- Chevrolet Silverado Diesel
- GMC Sierra
Side by side
| Chevrolet Silverado Diesel | GMC Sierra | |
|---|---|---|
| $2,056 | Your annual fuel cost | $2,214 |
| 27 MPG | Combined efficiency | 21 MPG |
| 23 MPG | City | 20 MPG |
| 33 MPG | Highway | 23 MPG |
| 383 g/mi | Tailpipe CO₂ (g/mi) | 421 g/mi |
| 6/10 | EPA fuel economy score | 4/10 |
| 5/10 | EPA greenhouse gas score | 4/10 |
| Diesel | Powertrain | Gas |
| Diesel | Fuel | Regular gasoline |
| 3.0L 6-cyl turbo | Engine / motor | 2.7L 4-cyl turbo |
| 10-speed automatic | Transmission | 8-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 across model years
- Chevrolet Silverado Diesel
- GMC Sierra
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 17 2021 full-size pickups, the Chevrolet Silverado Diesel ranks 4th and the GMC Sierra 8th for lowest fuel cost.
The powertrains differ: the Chevrolet Silverado Diesel is a diesel, while the GMC Sierra is a conventional gas model.
Frequently asked questions
Which is more fuel-efficient, the 2021 Chevrolet Silverado Diesel or the 2021 GMC Sierra?
Measured by cost to drive, the Chevrolet Silverado Diesel. The Chevrolet Silverado Diesel is rated 27 MPG combined and the GMC Sierra 21 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2021 Chevrolet Silverado Diesel vs. the GMC Sierra per year?
At 15,000 miles a year with $3.70/gal diesel fuel and $3.10/gal regular gas, about $2,056 for the Chevrolet Silverado Diesel and $2,214 for the GMC Sierra.
Chevrolet Silverado Diesel vs GMC Sierra in other years
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