- Gas
- Small SUVs
- MY2010–2027
GMC Terrain MPG & Fuel Cost by Year
18 model years · 2010–2027
15,000 mi/yr · regular gasoline $4.36/gal (U.S. average, Sep 2026)
GMC Terrain fuel economy at a glance
EPA has rated the GMC Terrain for 18 model years, 2010 to 2027. Across those years its combined rating runs 18–32 MPG. The latest model year, 2027, has 3 configurations rated 25–26 MPG combined and costing $2,510–$2,640 a year to fuel at regular gasoline $4.36/gal (U.S. average, Sep 2026). The most efficient configuration on record since 2010 is the 2019 Terrain 1.6L 4-cyl turbo AWD, at 32 MPG. Model year 2027 is still being filled in by EPA, so its row may gain configurations.
GMC Terrain MPG by year
| Year | Gas (MPG) | Diesel (MPG) | $/yr |
|---|---|---|---|
| 2025-2027* (D2XX) Generation page | |||
| 2027 (partial) | 25–26 | — | $2,510–$2,640 |
| 2026 | 25–27 | — | $2,420–$2,630 |
| 2025 | 25–27 | — | $2,440–$2,610 |
| 2018-2024 (D2UX) Generation page | |||
| 2024 | 25–26 | — | $2,510–$2,610 |
| 2023 | 26 | — | $2,470–$2,550 |
| 2022 | 26–27 | — | $2,420–$2,510 |
| 2021 | 26–27 | — | $2,420–$2,510 |
| 2020 | 23–27 | — | $2,380–$3,490 |
| 2019 | 23–28 | 32 | $2,340–$3,490 |
| 2018 | 23–28 | 32 | $2,360–$3,490 |
| 2010-2017 (Theta) Generation page | |||
| 2017 | 18–25 | — | $2,610–$3,600 |
| 2016 | 18–26 | — | $2,550–$3,540 |
| 2015 | 19–26 | — | $2,550–$3,500 |
| 2014 | 19–26 | — | $2,550–$3,500 |
| 2013 | 19–26 | — | $2,550–$3,500 |
| 2012 | 19–26 | — | $2,550–$3,470 |
| 2011 | 19–26 | — | $2,550–$3,470 |
| 2010 | 20–26 | — | $2,510–$3,270 |
Costs use the current EIA price set and 15,000 miles a year for every year, so years are comparable. Green marks the best year for each powertrain.
GMC Terrain generations
3 generations between 2010 and 2027. Open one for the table of every model year and configuration.
2027 powertrain options
More GMC models
Frequently asked questions
What is the GMC Terrain's gas mileage by year?
EPA combined ratings for the GMC Terrain run 18–32 MPG across model years 2010 to 2027. The latest year, 2027, is rated 25–26 MPG.
Which GMC Terrain model year has the best gas mileage?
The 2019 GMC Terrain Terrain 1.6L 4-cyl turbo AWD has the highest combined rating since 2010, at 32 MPG.
How much does a GMC Terrain cost to fuel per year?
For MY2027, EPA-rated configurations cost $2,510–$2,640 a year to fuel, driving 15,000 miles at regular gasoline $4.36/gal (U.S. average, Sep 2026). The most efficient one costs $2,510.
Has the GMC Terrain's fuel economy improved over time?
Not much. The most efficient configuration is rated 26 MPG in both 2010 and 2027.
How many generations of the GMC Terrain are there?
EPA data covers 3 generations of the GMC Terrain: 2025-2027*, 2018-2024, 2010-2017. Each has its own page with a table for every model year.