2003 GMC Sierra Denali
The EPA rates the 2003 GMC Sierra Denali at 13 MPG combined (11 city / 15 highway).
At a glance
- Fuel economy
- 13 MPG combined
Sources: NHTSA complaints, recalls and 5-Star ratings; U.S. EPA
Fuel economy
The EPA rates the 2003 GMC Sierra Denali at 13 MPG combined (11 city / 15 highway).