- Newest year: 2024
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2018-2024 GMC Terrain MPG & Fuel Cost
7 model years · 23–32 MPG combined
15,000 mi/yr · regular gasoline $4.36/gal (U.S. average, Sep 2026)
Cheaper to fuel than 5 of 10 small SUV configurations, MY2024. Ranked against all rated configurations, not sales-weighted.
2018-2024 GMC Terrain at a glance
The 2018-2024 GMC Terrain covers 7 model years in the EPA database (24 configurations in all), rated 23–32 MPG combined. The newest model year, 2024, 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). Powertrains over the years: gas and diesel. EPA changed the ratings in 2019, 2020, 2021, 2022, 2023 and 2024. The best combined rating in the generation, 32 MPG, was reached in 2018 and 2019.
2018-2024 GMC Terrain by model year
| Model year | Powertrains | Combined | $/yr | EPA ratings |
|---|---|---|---|---|
| 2024 | Gas | 25–26 MPG | $2,510–$2,610 | Ratings changed |
| 2023 | Gas | 26 MPG | $2,470–$2,550 | Ratings changed |
| 2022 | Gas | 26–27 MPG | $2,420–$2,510 | Ratings changed |
| 2021 | Gas | 26–27 MPG | $2,420–$2,510 | Ratings changed |
| 2020 | Gas | 23–27 MPG | $2,380–$3,490 | Ratings changed |
| 2019 | Gas, Diesel | 23–32 MPG | $2,340–$3,490 | Ratings changed |
| 2018 | Gas, Diesel | 23–32 MPG | $2,360–$3,490 | First year |
What the 2024 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
$20less a year
Class median $2,530 a year, MY2024
Based on 15,000 miles a year and regular gasoline $4.36/gal (U.S. average, Sep 2026).
2024 GMC Terrain MPG
Versus 2023: The most efficient configuration stays at 26 MPG. Its annual cost goes from $2,470 to $2,510, $40 more.
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 | 24 | 29 | 26 | $2,510 |
| Terrain 1.5L 4-cyl turbo AWD | 1.5L 4-cyl turbo | AWD | 23 | 28 | 25 | $2,610 |
2023 GMC Terrain MPG
26 MPG · $2,470–$2,550/yr
Versus 2022: The most efficient configuration moves from 27 to 26 MPG, down 1. Its annual cost goes from $2,420 to $2,470, $50 more.
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 | 24 | 29 | 26 | $2,470 |
| Terrain 1.5L 4-cyl turbo AWD | 1.5L 4-cyl turbo | AWD | 24 | 28 | 26 | $2,550 |
2022 GMC Terrain MPG
26–27 MPG · $2,420–$2,510/yr
Versus 2021: The most efficient configuration stays at 27 MPG. Its annual cost stays at $2,420.
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 | 25 | 30 | 27 | $2,420 |
| Terrain 1.5L 4-cyl turbo AWD | 1.5L 4-cyl turbo | AWD | 25 | 28 | 26 | $2,510 |
2021 GMC Terrain MPG
26–27 MPG · $2,420–$2,510/yr
Versus 2020: The most efficient configuration stays at 27 MPG. Its annual cost goes from $2,380 to $2,420, $40 more.
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 | 25 | 30 | 27 | $2,420 |
| Terrain 1.5L 4-cyl turbo AWD | 1.5L 4-cyl turbo | AWD | 25 | 28 | 26 | $2,510 |
2020 GMC Terrain MPG
23–27 MPG · $2,380–$3,490/yr
Versus 2019: The most efficient configuration moves from 32 to 27 MPG, down 5. Its annual cost goes from $2,970 to $2,380, $590 less.
Gas configurations (4)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| Terrain 1.5L 4-cyl turbo FWD (Most efficient) | 1.5L 4-cyl turbo | FWD | 26 | 30 | 27 | $2,380 |
| Terrain 1.5L 4-cyl turbo AWD | 1.5L 4-cyl turbo | AWD | 25 | 28 | 26 | $2,490 |
| Terrain 2.0L 4-cyl turbo FWD | 2.0L 4-cyl turbo | FWD | 22 | 28 | 24 | $3,350 |
| Terrain 2.0L 4-cyl turbo AWD | 2.0L 4-cyl turbo | AWD | 21 | 26 | 23 | $3,490 |
2 configurations require or recommend higher-octane gasoline and are costed at premium gasoline $5.36/gal (U.S. average, Sep 2026).
2019 GMC Terrain MPG
23–32 MPG · $2,340–$3,490/yr
Versus 2018: The most efficient configuration stays at 32 MPG. Its annual cost stays at $2,970.
Gas configurations (4)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| Terrain 1.5L 4-cyl turbo FWD (Most efficient) | 1.5L 4-cyl turbo | FWD | 26 | 30 | 28 | $2,340 |
| Terrain 1.5L 4-cyl turbo AWD | 1.5L 4-cyl turbo | AWD | 24 | 28 | 26 | $2,510 |
| Terrain 2.0L 4-cyl turbo FWD | 2.0L 4-cyl turbo | FWD | 22 | 28 | 24 | $3,350 |
| Terrain 2.0L 4-cyl turbo AWD | 2.0L 4-cyl turbo | AWD | 21 | 26 | 23 | $3,490 |
2 configurations require or recommend higher-octane gasoline and are costed at premium gasoline $5.36/gal (U.S. average, Sep 2026).
Diesel configurations (2)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| Terrain 1.6L 4-cyl turbo AWD (Most efficient) | 1.6L 4-cyl turbo | AWD | 28 | 38 | 32 | $2,970 |
| Terrain 1.6L 4-cyl turbo FWD | 1.6L 4-cyl turbo | FWD | 28 | 39 | 32 | $2,970 |
Diesel is priced at diesel $6.29/gal (U.S. average, Sep 2026).
2018 GMC Terrain MPG
23–32 MPG · $2,360–$3,490/yr
Gas configurations (4)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| Terrain 1.5L 4-cyl turbo FWD (Most efficient) | 1.5L 4-cyl turbo | FWD | 26 | 30 | 28 | $2,360 |
| Terrain 1.5L 4-cyl turbo AWD | 1.5L 4-cyl turbo | AWD | 24 | 28 | 26 | $2,510 |
| Terrain 2.0L 4-cyl turbo FWD | 2.0L 4-cyl turbo | FWD | 22 | 28 | 24 | $3,350 |
| Terrain 2.0L 4-cyl turbo AWD | 2.0L 4-cyl turbo | AWD | 21 | 26 | 23 | $3,490 |
2 configurations require or recommend higher-octane gasoline and are costed at premium gasoline $5.36/gal (U.S. average, Sep 2026).
Diesel configurations (2)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| Terrain 1.6L 4-cyl turbo FWD (Most efficient) | 1.6L 4-cyl turbo | FWD | 28 | 39 | 32 | $2,970 |
| Terrain 1.6L 4-cyl turbo AWD | 1.6L 4-cyl turbo | AWD | 28 | 38 | 32 | $2,970 |
Diesel is priced at diesel $6.29/gal (U.S. average, Sep 2026).
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 MY2024 small SUV models.
Generations
- 2010-2017 (Theta)
- 2018-2024 (D2UX)
- 2025-2027* (D2XX)
Frequently asked questions
What gas mileage does the 2018-2024 GMC Terrain get?
EPA rates the 2018-2024 GMC Terrain at 23–32 MPG combined across 24 configurations and 7 model years. The most efficient version, the 2019 Terrain 1.6L 4-cyl turbo AWD, is rated 32 MPG (28 city, 38 highway). By powertrain: Gas: 23–28 MPG; Diesel: 32 MPG.
Which years had the best MPG in the 2018-2024 GMC Terrain?
The Terrain 1.6L 4-cyl turbo AWD reached the generation's best combined rating, 32 MPG, in 2018 and 2019. The lowest top rating, 26 MPG, was in 2023 and 2024.
Did EPA ratings change during the 2018-2024 GMC Terrain?
Yes. Ratings changed in 2019, 2020, 2021, 2022, 2023 and 2024.
How does the 2018-2024 GMC Terrain compare with the previous generation?
The previous generation (2010-2017 GMC Terrain) is rated 18–26 MPG combined and costs $2,510–$3,600 a year to fuel; the 2018-2024 model is rated 23–32 MPG and costs $2,340–$3,490 a year.
How much does it cost to fuel a 2024 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 2 configurations the cost runs $2,510–$2,610 a year. That is a $100 difference between the cheapest and the costliest configuration.
How much does it cost to drive a 2024 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 $17.40 across all configurations. That is the annual cost over 15,000 miles divided by 150.
Is the 2024 GMC Terrain more efficient in the city or on the highway?
The Terrain 1.5L 4-cyl turbo FWD is rated 24 city and 29 highway MPG, so it is more efficient on the highway, by 5 MPG.
How does the 2024 GMC Terrain compare with other small SUV configurations?
The Terrain 1.5L 4-cyl turbo FWD costs about $2,510 a year to fuel, $20 less than the class median of $2,530, and less than 5 of 10 small SUV configurations. The comparison covers all 306 rated small SUV configurations for MY2024, not weighted by sales.
Is the 2024 GMC Terrain different from the 2023 model?
The most efficient configuration stays at 26 MPG. Its annual cost goes from $2,470 to $2,510, $40 more. EPA lists 2 configurations for 2024 against 2 configurations for 2023. See the 2023 GMC Terrain for that year.