2020 head-to-head · Full-Size Pickup
2020 GMC Sierra Diesel vs Honda Ridgeline
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 and $3.10/gal regular gas, the most efficient 2020 GMC Sierra Diesel (26 MPG) costs about $2,135 a year to fuel and the 2020 Honda Ridgeline (22 MPG) about $2,114.
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
- Honda Ridgeline
Side by side
| GMC Sierra Diesel | Honda Ridgeline | |
|---|---|---|
| $2,135 | Your annual fuel cost | $2,114 |
| 26 MPG | Combined efficiency | 22 MPG |
| 23 MPG | City | 19 MPG |
| 30 MPG | Highway | 26 MPG |
| 392 g/mi | Tailpipe CO₂ (g/mi) | 407 g/mi |
| 5/10 | 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 | 3.5L 6-cyl |
| 10-speed automatic | Transmission | 9-speed automatic |
| RWD | Drivetrain | FWD |
✓ 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 Honda Ridgeline across model years
- GMC Sierra Diesel
- Honda Ridgeline
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 16 2020 full-size pickups, the GMC Sierra Diesel ranks 6th and the Honda Ridgeline 5th for lowest fuel cost.
The powertrains differ: the GMC Sierra Diesel is a diesel, while the Honda Ridgeline is a conventional gas model.
Frequently asked questions
Which is more fuel-efficient, the 2020 GMC Sierra Diesel or the 2020 Honda Ridgeline?
Measured by cost to drive, the Honda Ridgeline. The GMC Sierra Diesel is rated 26 MPG combined and the Honda Ridgeline 22 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2020 GMC Sierra Diesel vs. the Honda Ridgeline 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 $2,114 for the Honda Ridgeline.
GMC Sierra Diesel vs Honda Ridgeline in other years
More 2020 comparisons
GMC Sierra Diesel vs…
Or compare the 2020 GMC Sierra Diesel with anything else: