The 2008 GMC Sierra flex-fuel is available in a 2WD, 5.3L V-8 with fuel economy of 15/20 mpg or
a 4WD, 5.3L V-8 with ratings of 14/19 mpg.
According to the National Ethanol Vehicle Coalition, model year 2008 General Motors FFVs will be available in all 50 states.
According to the National Ethanol Vehicle Coalition, model year 2008 General Motors FFVs will be available in all 50 states.