2021 GMC Terrain
27MPG
Combined
2
Trims
Updated February 27, 2026
Looking at the 2021 GMC Terrain? This Compact SUV offers 26–27 combined MPG depending on trim and comes with 2 available configurations. We break down the specs, safety data, and how it compares to the competition.
2021 GMC Terrain Specifications
| Spec | Value |
|---|---|
| Combined MPG | 26–27 combined MPG depending on trim |
| City MPG | 25 |
| Highway MPG | 30 |
| Body Style | Compact SUV |
| Fuel Type | Regular |
| Drive | AWD |
| Available Trims | 2 |
Available Trims
| Trim | MPG (City/Hwy/Combined) | Engine | Transmission |
|---|---|---|---|
| Auto | 25/28/26 | 1.5L 4cyl | Automatic 9-spd |
| Auto | 25/30/27 | 1.5L 4cyl | Automatic 9-spd |
Annual Fuel Cost
Based on EPA estimates, the 2021 GMC Terrain costs approximately $1,675 per year in fuel. This assumes 15,000 miles driven annually and current fuel prices.
Compare the 2021 GMC Terrain
See how it stacks up against similar vehicles:
Other Model Years
- 2026 GMC Terrain
- 2025 GMC Terrain
- 2024 GMC Terrain
- 2023 GMC Terrain
- 2022 GMC Terrain
- 2021 (this page)
- 2020 GMC Terrain
- 2019 GMC Terrain
- 2018 GMC Terrain
- 2017 GMC Terrain
- 2016 GMC Terrain
- 2015 GMC Terrain
- 2014 GMC Terrain
- 2013 GMC Terrain
- 2012 GMC Terrain
- 2011 GMC Terrain
- 2010 GMC Terrain
Check Vehicle History
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