2027 · Small SUV · Gas
2027 GMC Terrain MPG & fuel economy
The 2027 GMC Terrain is a small SUV offered in 3 EPA-rated configurations. The most efficient version returns 26 MPG combined (25 city / 28 highway) on regular gasoline. Across the lineup, combined ratings range from 25 to 26 MPG. That's down 1 MPG from the 2026 model. Among 48 small SUVs rated for 2027, it ranks 34th for lowest fuel cost. At 15,000 miles a year with $3.10/gal regular gas, it costs about $1,788 a year to fuel.
What will it cost you?
Your mileage and prices are saved and used across the site.
Fuel average
The 2027 GMC Terrain's fuel average is 11.1 km/L (9.0 L/100 km), or 26 MPG combined: 10.6 km/L in the city and 11.9 km/L on the highway.
| MPG | km/L | L/100 km | |
|---|---|---|---|
| City | 25 | 10.6 | 9.4 |
| Highway | 28 | 11.9 | 8.4 |
| Combined | 26 | 11.1 | 9.0 |
How it ranks among 2027 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 · 8-speed automatic Terrain FWD |
Gas | 25 MPG | 28 MPG | 26 MPG | — | $1,788 |
| 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
- 8-speed automatic
- Drivetrain
- FWD
- Tailpipe CO₂
- 342 g/mi
- EPA fuel economy score
- 5/10
- EPA greenhouse gas score
- 5/10
2027 GMC Terrain vs. rivals
Compare the 2027 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 2027 GMC Terrain?
Up to 26 MPG combined (25 city / 28 highway); ratings range from 25 to 26 MPG depending on configuration.
What fuel does the 2027 GMC Terrain use?
Regular gasoline.
What is the fuel average in km/L for the 2027 GMC Terrain?
The 2027 GMC Terrain's fuel average is 11.1 km/L (9.0 L/100 km), or 26 MPG combined: 10.6 km/L in the city and 11.9 km/L on the highway.
How much does it cost to fuel the 2027 GMC Terrain per year?
About $1,788 at 15,000 miles a year with $3.10/gal regular gas, or $11.92 per 100 miles. Use the calculator on this page to plug in your own mileage and prices.