The 2008 GMC Savana is available as a 3-door, 2-seat cargo van. Starting at $23,070, the 2008 GMC Savana Work Van RWD G1500 Cargo is powered by a 4.3L , 6 -cylinder engine mated to an automatic transmission that returns an EPA estimated 15-mpg in the city and 20-mpg on the highway. The top of the line 2008GMCSavanaUpfitter RWD G2500 Extended Cargo HD , priced at $ 29,570 , is powered by a 6.0L , 8 - cylinder engine mated to an automatic transmission that returns an EPA estimated