The 2003 Chevrolet Silverado 3500 is available as a 4-door, 5-seat regular side. Starting at $31,862, the 2003 Chevrolet Silverado 3500 LS 4x2 Crew Cab is powered by a 6.0L , 8 -cylinder engine mated to a manual transmission that returns an EPA estimated The top of the line 2003ChevroletSilverado 3500Base 4x4 Extended Cab , priced at $ 30,850 , is powered by a 6.0L , 8 - cylinder engine mated to a manual transmission that returns an EPA estimated