2027 GMC Terrain
The EPA lists 3 versions of the 2027 GMC Terrain. Combined fuel economy ranges from 25 to 26 MPG; the most efficient version is rated 25 city / 28 highway.
At a glance
- Fuel economy
- 25 to 26 MPG combined
Sources: NHTSA complaints, recalls and 5-Star ratings; U.S. EPA
Fuel economy
The EPA lists 3 versions of the 2027 GMC Terrain. Combined fuel economy ranges from 25 to 26 MPG; the most efficient version is rated 25 city / 28 highway.