2025 head-to-head · Full-Size Pickup vs Small Pickup
2025 GMC Sierra Diesel vs Toyota Tacoma
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 2025 Toyota Tacoma 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 $2,022 a year to fuel (23 MPG), versus $2,135 for the 2025 GMC Sierra Diesel (26 MPG). That's roughly $113 a year, or about $564 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
- Toyota Tacoma
Side by side
| GMC Sierra Diesel | Toyota Tacoma | |
|---|---|---|
| $2,135 | Your annual fuel cost | $2,022 |
| 26 MPG | Combined efficiency | 23 MPG |
| 23 MPG | City | 21 MPG |
| 29 MPG | Highway | 26 MPG |
| 399 g/mi | Tailpipe CO₂ (g/mi) | 393 g/mi |
| 5/10 | EPA fuel economy score | 5/10 |
| 5/10 | EPA greenhouse gas score | 5/10 |
| Diesel | Powertrain | Gas |
| Diesel | Fuel | Regular gasoline |
| 3.0L 6-cyl turbo | Engine / motor | 2.4L 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.
GMC Sierra Diesel vs Toyota Tacoma across model years
- GMC Sierra Diesel
- Toyota Tacoma
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
The powertrains differ: the GMC Sierra Diesel is a diesel, while the Toyota Tacoma is a conventional gas model.
Frequently asked questions
Which is more fuel-efficient, the 2025 GMC Sierra Diesel or the 2025 Toyota Tacoma?
Measured by cost to drive, the Toyota Tacoma. The GMC Sierra Diesel is rated 26 MPG combined and the Toyota Tacoma 23 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2025 GMC Sierra Diesel vs. the Toyota Tacoma per year?
At 15,000 miles a year with $3.70/gal diesel fuel and $3.10/gal regular gas, about $2,135 for the GMC Sierra Diesel and $2,022 for the Toyota Tacoma.
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