2021 GMC Terrain MPG
EPA-rated · verified snapshot 2026-08-30 · Small Sport Utility Vehicle 2WD
The 2021 GMC Terrain gets 27 MPG combined — 25 city and 30 highway — in its most efficient configuration (1.5L · 4-cyl · Automatic 9-spd · Front-Wheel Drive).
City25 MPG
Highway30 MPG
$2,300Fuel cost / yr (EPA est.)
329 g/miCO₂
RegularFuel
$-5005-yr fuel cost vs. average vehicle
6 / 10EPA Fuel Economy & GHG score
13 ft³Cargo volume
90 ft³Passenger volume
Where it sits among compact suvs (2021)
Every 2021 Terrain trim
| Configuration | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|
| 1.5L · 4-cyl · Automatic 9-spd · Front-Wheel Drive | 25 | 30 | 27 | $2,300 |
| 1.5L · 4-cyl · Automatic 9-spd · All-Wheel Drive | 25 | 28 | 26 | $2,350 |
FAQ
Where does the 2021 Terrain rank among compact suvs for MPG?
The 2021 Terrain's 27 MPG combined is below the compact suvs average of 28.1 MPG for 2021.
How much does it cost to fuel a 2021 Terrain per year?
Based on EPA assumptions (15,000 miles/year), estimated annual fuel cost is $2,300 for the most efficient trim.
What is the city and highway MPG of the 2021 Terrain?
The most efficient trim is rated 25 MPG city and 30 MPG highway.