2021 head-to-head · Full-Size Pickup
2021 GMC Sierra Diesel vs Ram 1500 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 2021 GMC Sierra Diesel (26 MPG) costs about $2,135 a year to fuel and the 2021 Ram 1500 Diesel (26 MPG) about $2,135.
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
- Ram 1500 Diesel
Side by side
| GMC Sierra Diesel | Ram 1500 Diesel | |
|---|---|---|
| $2,135 | Your annual fuel cost | $2,135 |
| 26 MPG | Combined efficiency | 26 MPG |
| 23 MPG | City | 22 MPG |
| 30 MPG | Highway | 32 MPG |
| 392 g/mi | Tailpipe CO₂ (g/mi) | 390 g/mi |
| 5/10 | EPA fuel economy score | 5/10 |
| 5/10 | EPA greenhouse gas score | 5/10 |
| Diesel | Powertrain | Diesel |
| Diesel | Fuel | Diesel |
| 3.0L 6-cyl turbo | Engine / motor | 3.0L 6-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.
GMC Sierra Diesel vs Ram 1500 Diesel across model years
- GMC Sierra Diesel
- Ram 1500 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 17 2021 full-size pickups, the GMC Sierra Diesel ranks 6th and the Ram 1500 Diesel 7th for lowest fuel cost.
Frequently asked questions
How much does it cost to fuel the 2021 GMC Sierra Diesel vs. the Ram 1500 Diesel per year?
At 15,000 miles a year with $3.70/gal diesel fuel, about $2,135 for the GMC Sierra Diesel and $2,135 for the Ram 1500 Diesel.
GMC Sierra Diesel vs Ram 1500 Diesel in other years
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