The 2002 GMC Sierra 1500 is available as a 2-door, 3-seat regular side. Starting at $25,367, the 2002 GMC Sierra 1500 SL 4x2 Extended Cab Short Box is powered by a 4.8L, 8-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 2002 GMC Sierra 1500 SLT 4x4 Extended Cab Long Box, priced at $30,096, 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 17-mpg on the highway.