- Newest year: 2027
- Gas
- Small SUVs
- Partial model year
2025-2027 GMC Terrain MPG & Fuel Cost
3 model years · 25–27 MPG combined
15,000 mi/yr · regular gasoline $4.36/gal (U.S. average, Sep 2026)
Cheaper to fuel than 3 of 10 small SUV configurations, MY2027. Ranked against all rated configurations, not sales-weighted.
2025-2027 GMC Terrain at a glance
The 2025-2027 GMC Terrain covers 3 model years in the EPA database (8 configurations in all), rated 25–27 MPG combined. The newest model year, 2027, costs about $2,510 a year to fuel for its most efficient version, the Terrain 1.5L 4-cyl turbo FWD (26 MPG), at regular gasoline $4.36/gal (U.S. average, Sep 2026). EPA changed the ratings in 2026 and 2027. The best combined rating in the generation, 27 MPG, was reached in 2025 and 2026.
Model year 2027 is still being filled in by EPA (3 configurations listed so far), so rows may be added.
2025-2027 GMC Terrain by model year
| Model year | Powertrains | Combined | $/yr | EPA ratings |
|---|---|---|---|---|
| 2027 (partial) | Gas | 25–26 MPG | $2,510–$2,640 | Ratings changed |
| 2026 | Gas | 25–27 MPG | $2,420–$2,630 | Ratings changed |
| 2025 | Gas | 25–27 MPG | $2,440–$2,610 | First year |
What the 2027 Terrain 1.5L 4-cyl turbo FWD costs to drive
Per month
$209
$2,510 a year ÷ 12
Per 25 miles
$4.18
Per 100 miles
$16.73
Five years
$12,550
5 × the yearly cost, prices held at today's level
vs the small SUV median
$340more a year
Class median $2,170 a year, MY2027
Based on 15,000 miles a year and regular gasoline $4.36/gal (U.S. average, Sep 2026).
2027 GMC Terrain MPG
Model year 2027 is still being filled in by EPA (3 configurations listed so far), so rows may be added.
Versus 2026: The most efficient configuration moves from 27 to 26 MPG, down 1. Its annual cost goes from $2,420 to $2,510, $90 more.
Gas configurations (3)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| Terrain 1.5L 4-cyl turbo FWD (Most efficient) | 1.5L 4-cyl turbo | FWD | 25 | 28 | 26 | $2,510 |
| Terrain 1.5L 4-cyl turbo AWD | 1.5L 4-cyl turbo | AWD | 24 | 28 | 25 | $2,610 |
| Denali/AT4 | 1.5L 4-cyl turbo | AWD | 24 | 26 | 25 | $2,640 |
2026 GMC Terrain MPG
25–27 MPG · $2,420–$2,630/yr
Versus 2025: The most efficient configuration stays at 27 MPG. Its annual cost goes from $2,440 to $2,420, $20 less.
Gas configurations (3)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| Terrain 1.5L 4-cyl turbo FWD (Most efficient) | 1.5L 4-cyl turbo | FWD | 26 | 28 | 27 | $2,420 |
| Terrain 1.5L 4-cyl turbo AWD | 1.5L 4-cyl turbo | AWD | 24 | 28 | 25 | $2,610 |
| Denali/AT4 | 1.5L 4-cyl turbo | AWD | 24 | 26 | 25 | $2,630 |
2025 GMC Terrain MPG
25–27 MPG · $2,440–$2,610/yr
Gas configurations (2)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| Terrain 1.5L 4-cyl turbo FWD (Most efficient) | 1.5L 4-cyl turbo | FWD | 26 | 28 | 27 | $2,440 |
| Terrain 1.5L 4-cyl turbo AWD | 1.5L 4-cyl turbo | AWD | 24 | 28 | 25 | $2,610 |
Fuel cost by state
Yearly cost of the Terrain 1.5L 4-cyl turbo FWD: $3,420 in California and $2,190 in Texas, a $1,230 difference.
- California $3,420
- Washington $3,170
- New York $2,510
- Florida $2,370
- Texas $2,190
Similar cars
Closest combined MPG among MY2027 small SUV models.
Generations
- 2010-2017 (Theta)
- 2018-2024 (D2UX)
- 2025-2027* (D2XX)
Frequently asked questions
What gas mileage does the 2025-2027 GMC Terrain get?
EPA rates the 2025-2027 GMC Terrain at 25–27 MPG combined across 8 configurations and 3 model years. The most efficient version, the 2026 Terrain 1.5L 4-cyl turbo FWD, is rated 27 MPG (26 city, 28 highway).
Which years had the best MPG in the 2025-2027 GMC Terrain?
The Terrain 1.5L 4-cyl turbo FWD reached the generation's best combined rating, 27 MPG, in 2025 and 2026. The lowest top rating, 26 MPG, was in 2027.
Did EPA ratings change during the 2025-2027 GMC Terrain?
Yes. Ratings changed in 2026 and 2027.
How does the 2025-2027 GMC Terrain compare with the previous generation?
The previous generation (2018-2024 GMC Terrain) is rated 23–32 MPG combined and costs $2,340–$3,490 a year to fuel; the 2025-2027 model is rated 25–27 MPG and costs $2,420–$2,640 a year.
How much does it cost to fuel a 2027 GMC Terrain per year?
Driving 15,000 miles a year at regular gasoline $4.36/gal (U.S. average, Sep 2026), the Terrain 1.5L 4-cyl turbo FWD costs about $2,510 a year. Across all 3 configurations the cost runs $2,510–$2,640 a year. That is a $130 difference between the cheapest and the costliest configuration.
How much does it cost to drive a 2027 GMC Terrain 100 miles?
About $16.73 per 100 miles for the Terrain 1.5L 4-cyl turbo FWD at regular gasoline $4.36/gal (U.S. average, Sep 2026), and between $16.73 and $17.60 across all configurations. That is the annual cost over 15,000 miles divided by 150.
Is the 2027 GMC Terrain more efficient in the city or on the highway?
The Terrain 1.5L 4-cyl turbo FWD is rated 25 city and 28 highway MPG, so it is more efficient on the highway, by 3 MPG.
How does the 2027 GMC Terrain compare with other small SUV configurations?
The Terrain 1.5L 4-cyl turbo FWD costs about $2,510 a year to fuel, $340 more than the class median of $2,170, and less than 3 of 10 small SUV configurations. The comparison covers all 122 rated small SUV configurations for MY2027, not weighted by sales.
Is the 2027 GMC Terrain different from the 2026 model?
The most efficient configuration moves from 27 to 26 MPG, down 1. Its annual cost goes from $2,420 to $2,510, $90 more. EPA lists 3 configurations for 2027 against 3 configurations for 2026. See the 2026 GMC Terrain for that year.