1990 GMC Sierra 1500
The EPA lists 23 versions of the 1990 GMC Sierra 1500. Combined fuel economy ranges from 12 to 18 MPG; the most efficient version is rated 16 city / 22 highway.
At a glance
- Fuel economy
- 12 to 18 MPG combined
Sources: NHTSA complaints, recalls and 5-Star ratings; U.S. EPA
Fuel economy
The EPA lists 23 versions of the 1990 GMC Sierra 1500. Combined fuel economy ranges from 12 to 18 MPG; the most efficient version is rated 16 city / 22 highway.