GMC Terrain MPG by Year
Here's the official EPA GMC Terrain MPG for every engine and drivetrain from 2010 to 2027.
Terrain MPG by Year and Version
The EPA has rated 81 configurations of the Terrain across gas and diesel versions. Pick a year to compare engines and drivetrains.
Terrain MPG Over the Years
Each bar shows the range of combined MPG across every Terrain configuration the EPA rated that year, from the thirstiest version to the most efficient. Hover or tap a year to see the numbers.
Years When Terrain Fuel Economy Changed
Most years look a lot like the one before. These are the years where the EPA numbers moved in a way that matters if you're shopping for a used Terrain.
- 2018: The top combined rating rises to 32 MPG, up from 25 MPG the year before.
How the Terrain Compares
The EPA rated 69 small SUVs for 2026. The best Terrain version, at 27 MPG combined, ties for 30th with 8 other models of 69. Combined ratings in the class run from 20 to 53 MPG, with a median of 27. Plug-in hybrids and electric models are ranked separately.
| Rank | Model | Combined |
|---|---|---|
| 1 | Kia Niro | 53 MPG |
| 2 | Toyota RAV4 | 43 MPG |
| 3 | Kia Sportage | 42 MPG |
| 3 | Toyota Corolla Cross | 42 MPG |
| 5 | Lexus NX | 40 MPG |
| 30 | GMC Terrain | 27 MPG |
What Does a Terrain Cost to Fuel?
Pick a Terrain, then enter your gas price and how much you drive. The math uses the EPA city and highway ratings, weighted by how much of your driving happens in each.
Terrain MPG Questions
Which Terrain year gets the best gas mileage?
The 2018 and 2019 Terrain AWD holds the top EPA rating at 32 MPG combined (28 city, 38 highway). Among 2026 models, the Terrain FWD is rated at 27 MPG combined.
Does all-wheel drive hurt Terrain fuel economy?
A little. On the 2027 Terrain, the best front-wheel drive version is rated at 26 MPG combined and the best all-wheel drive version at 25 MPG.
Why doesn't my Terrain match the EPA numbers?
EPA ratings come from standardized lab tests. Your results depend on speed, climate, idling, passengers and cargo, roof racks, tire pressure and upkeep. The ratings are best for comparing one vehicle against another. To track your own numbers, try the MPG calculator.
Keep Going
Where These Numbers Come From
This page was built by Cedrick Reese from the U.S. EPA fuel economy dataset on fueleconomy.gov, which holds 81 ratings for the GMC Terrain from 2010 to 2027. Each row in the table links to the matching EPA vehicle record, so you can check any figure against the source. The page is rebuilt whenever the EPA publishes an updated file, which picks up new model years and any rating corrections. The cost calculator uses the gas price you enter rather than a national average, so the result fits where you live.
Ratings on this page come from the EPA file downloaded on October 1, 2026.
Sources
- Download Fuel Economy Data, fueleconomy.gov, U.S. DOE and EPA
- Factors that affect fuel economy, fueleconomy.gov