The 2003 Chevrolet Suburban 1500 is available as a 4-door, 9-seat sport utility. Starting at $37,050, the 2003 Chevrolet Suburban 1500 LS 4x2 is powered by a 5.3L , 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 2003ChevroletSuburban 1500LT 4x4 , priced at $ 39,850 , is powered by a 5.3L , 8 - cylinder engine mated to an automatic transmission that returns an EPA estimated 13-mpg in the city and 17-mpg on the highway.