The 2008 Chevrolet Silverado 1500 is available as a 2-door, 3-seat regular side. Starting at $31,405, the 2008 Chevrolet Silverado 1500 LS 4x4 Crew Cab is powered by a 4.8L , 8 -cylinder engine mated to an automatic transmission that returns an EPA estimated 14-mpg in the city and 18-mpg on the highway. The top of the line 2008ChevroletSilverado 1500LT2 4x2 Extended Cab 8' Box , priced at $ 29,360 , is powered by a 5.3L , 8 - cylinder engine mated to an automatic transmission that returns an EPA estimated 15-mpg in the city and 20-mpg on the highway.