2026 · Small SUV · Gas
2026 GMC Terrain MPG & fuel economy
The 2026 GMC Terrain is a small SUV offered in 3 EPA-rated configurations. The most efficient version returns 27 MPG combined (26 city / 28 highway) on regular gasoline. Across the lineup, combined ratings range from 25 to 27 MPG. Efficiency is unchanged from the 2025 model. Among 114 small SUVs rated for 2026, it ranks 65th for lowest fuel cost. At 15,000 miles a year with $3.10/gal regular gas, it costs about $1,722 a year to fuel.
What will it cost you?
Your mileage and prices are saved and used across the site.
Fuel average
The 2026 GMC Terrain's fuel average is 11.5 km/L (8.7 L/100 km), or 27 MPG combined: 11.1 km/L in the city and 11.9 km/L on the highway.
| MPG | km/L | L/100 km | |
|---|---|---|---|
| City | 26 | 11.1 | 9.0 |
| Highway | 28 | 11.9 | 8.4 |
| Combined | 27 | 11.5 | 8.7 |
How it ranks among 2026 Small SUVs
Full class ranking →Annual fuel cost at 15,000 miles and default prices; shorter bars cost less.
Terrain MPG across model years
Full history →3 EPA-rated configurations
| Configuration | Type | City | Hwy | Combined | Range | Your cost / yr |
|---|---|---|---|---|---|---|
| FWD · 1.5L 4-cyl turbo · CVT Terrain FWD |
Gas | 26 MPG | 28 MPG | 27 MPG | — | $1,722 |
| AWD · 1.5L 4-cyl turbo · 8-speed automatic Terrain AWD |
Gas | 24 MPG | 28 MPG | 25 MPG | — | $1,860 |
| AWD · 1.5L 4-cyl turbo · 8-speed automatic Terrain AWD Denali/AT4 |
Gas | 24 MPG | 26 MPG | 25 MPG | — | $1,860 |
Specs (most efficient configuration)
- Fuel
- Regular gasoline
- Engine / motor
- 1.5L 4-cyl turbo
- Transmission
- CVT
- Drivetrain
- FWD
- Tailpipe CO₂
- 329 g/mi
- EPA fuel economy score
- 5/10
- EPA greenhouse gas score
- 5/10
2026 GMC Terrain vs. rivals
Compare the 2026 Terrain
With any other car from any year, including other Terrain model years. Type a year to jump, e.g. "2015 Accord".
Frequently asked questions
What is the gas mileage of the 2026 GMC Terrain?
Up to 27 MPG combined (26 city / 28 highway); ratings range from 25 to 27 MPG depending on configuration.
What fuel does the 2026 GMC Terrain use?
Regular gasoline.
What is the fuel average in km/L for the 2026 GMC Terrain?
The 2026 GMC Terrain's fuel average is 11.5 km/L (8.7 L/100 km), or 27 MPG combined: 11.1 km/L in the city and 11.9 km/L on the highway.
How much does it cost to fuel the 2026 GMC Terrain per year?
About $1,722 at 15,000 miles a year with $3.10/gal regular gas, or $11.48 per 100 miles. Use the calculator on this page to plug in your own mileage and prices.