2021 head-to-head · Full-Size Pickup
2021 GMC Sierra vs Nissan Frontier
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 GMC Sierra is the cheaper one to run. Driving 15,000 miles a year with $3.10/gal regular gas, it costs about $2,214 a year to fuel (21 MPG), versus $2,325 for the 2021 Nissan Frontier (20 MPG). That's roughly $111 a year, or about $554 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
- Nissan Frontier
Side by side
| GMC Sierra | Nissan Frontier | |
|---|---|---|
| $2,214 | Your annual fuel cost | $2,325 |
| 21 MPG | Combined efficiency | 20 MPG |
| 20 MPG | City | 18 MPG |
| 23 MPG | Highway | 24 MPG |
| 421 g/mi | Tailpipe CO₂ (g/mi) | 445 g/mi |
| 4/10 | EPA fuel economy score | 4/10 |
| 4/10 | EPA greenhouse gas score | 4/10 |
| Gas | Powertrain | Gas |
| Regular gasoline | Fuel | Regular gasoline |
| 2.7L 4-cyl turbo | Engine / motor | 3.8L 6-cyl |
| 8-speed automatic | Transmission | 9-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 vs Nissan Frontier across model years
- GMC Sierra
- Nissan Frontier
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 ranks 8th and the Nissan Frontier 12th for lowest fuel cost.
Frequently asked questions
Which is more fuel-efficient, the 2021 GMC Sierra or the 2021 Nissan Frontier?
Measured by cost to drive, the GMC Sierra. The GMC Sierra is rated 21 MPG combined and the Nissan Frontier 20 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2021 GMC Sierra vs. the Nissan Frontier per year?
At 15,000 miles a year with $3.10/gal regular gas, about $2,214 for the GMC Sierra and $2,325 for the Nissan Frontier.
GMC Sierra vs Nissan Frontier in other years
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