GMC · Small SUVs · Gasoline
GMC Terrain: MPG and annual fuel cost, 2026
Rated at 27 MPG combined for 2026, the GMC Terrain is tied for 69th of 113 small SUVs, in the lower half.
- 27MPG combinedtied 69th of 113 in class
- $2,500a year in fueltied 63rd of 113 in class
- 329g/mile CO2
Where it stands
Compared only with the gasoline models of its class it is tied for 19th of 58 gasoline small SUVs, in the upper half. The median of that narrower group is 26 MPG, against 29 MPG for all small SUVs together.
Across every class it is tied for 44th of 180 gasoline models, in the upper half.
GMC has 8 models in the 2026 data. This one ranks 2nd of them on combined rating, against a make median of 22.5 MPG.
In its class, just ahead of it is the BMW X1 at 28 MPG and just behind it is the Jeep Compass at 26 MPG.
Fuel cost and CO2
At 15,000 miles a year with 55% of them in the city, with regular gasoline at $4.47 per gallon, the annual fuel bill of the most efficient version is about $2,500. That is $200 more than the small SUVs median of $2,300, which makes it tied for 63rd of 113 small SUVs, in the lower half.
Tailpipe CO2 is 329 g/mile, 31 g/mile above the small SUVs median of 298.
Rated versions
In the city the most efficient version is rated 26 and on the highway 28, 2 better on the open road. 3 versions are rated for 2026. The most efficient, Terrain FWD: 1.5 L, 4 cyl, Automatic (variable gear ratios), FWD, gets 27 MPG; the least efficient listed, Terrain AWD: 1.5 L, 4 cyl, Automatic 8-spd, AWD, gets 25 MPG, a gap of 2 MPG. With the file's assumptions that gap is worth about $200 a year in fuel.
| Version | Combined MPG | City MPG | Highway MPG | Annual fuel cost | CO2 g/mile |
|---|---|---|---|---|---|
| Terrain FWD: 1.5 L, 4 cyl, Automatic (variable gear ratios), FWD | 27 | 26 | 28 | $2,500 | 329 |
| Terrain AWD Denali/AT4: 1.5 L, 4 cyl, Automatic 8-spd, AWD | 25 | 24 | 26 | $2,700 | 358 |
| Terrain AWD: 1.5 L, 4 cyl, Automatic 8-spd, AWD | 25 | 24 | 28 | $2,700 | 356 |
Year by year
The GMC Terrain is in the data for 8 of the 8 model years from 2019 to 2026. Its best combined rating went from 28 in 2019 to 27 MPG in 2026, down 1 MPG. The number of rated versions shrank from 4 to 3. Fuel cost for the best version is $2,500 in the latest data against $2,400 in 2019, although the file applies today's fuel prices to every model year, so that change comes from the rating, not from prices.
| Model year | Versions | Best MPG | Lowest MPG | Fuel cost | CO2 g/mi | Class median |
|---|---|---|---|---|---|---|
| 2026 | 3 | 27 | 25 | $2,500 | 329 | 29 |
| 2025 | 2 | 27 | 25 | $2,500 | 332 | 29 |
| 2024 | 2 | 26 | 25 | $2,600 | 342 | 28 |
| 2023 | 2 | 26 | 26 | $2,600 | 347 | 27 |
| 2022 | 2 | 27 | 26 | $2,500 | 330 | 26 |
| 2021 | 2 | 27 | 26 | $2,500 | 329 | 26 |
| 2020 | 4 | 27 | 23 | $2,500 | 325 | 26 |
| 2019 | 4 | 28 | 23 | $2,400 | 317 | 26 |
Similar models
| Model | Powertrain | Combined MPG | Annual fuel cost | Model year |
|---|---|---|---|---|
| Mazda CX-30 | Gasoline | 27 | $2,500 | 2026 |
| Mercedes-Benz GLC-Class Hybrid | Hybrid | 27 | $3,050 | 2026 |
| BMW X2 | Gasoline | 28 | $2,950 | 2026 |
| Jeep Compass | Gasoline | 26 | $2,600 | 2026 |
| Kia Sorento | Gasoline | 26 | $2,600 | 2026 |
Rated almost identically and covered by this page:
- Chevrolet Equinox 27 MPG, $2,500 a year, 2 versions, last rated 2026
- Ford Bronco Sport 27 MPG, $2,500 a year, 3 versions, last rated 2026
- MINI Countryman 27 MPG, $3,050 a year, 2 versions, last rated 2026
- Subaru Outback 27 MPG, $2,500 a year, 3 versions, last rated 2026
Compare and rank
Rankings: Small SUVs, Gasoline, GMC, Gasoline small SUVs.
Data: US EPA and DOE, as prepared in methods and data.