The 2002 Chevrolet TrailBlazer EXT is available as a 4-door, 7-seat sport utility. Starting at $31,035, the 2002 Chevrolet TrailBlazer EXT 4x2 is powered by a 4.2L, 6-cylinder engine mated to an automatic transmission that returns an EPA estimated 16-mpg in the city and 22-mpg on the highway. The top of the line 2002 Chevrolet TrailBlazer EXT 4x4, priced at $33,260, is powered by a 4.2L, 6-cylinder engine mated to an automatic transmission that returns an EPA estimated 16-mpg in the city and 22-mpg on the highway.