The 2003 Chevrolet TrailBlazer is available as a 4-door, 5-seat sport utility. Starting at $26,895, the 2003 Chevrolet TrailBlazer LS 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 2003 Chevrolet TrailBlazer LTZ 4x4, priced at $35,545, is powered by a 4.2L, 6-cylinder engine mated to an automatic transmission that returns an EPA estimated 15-mpg in the city and 21-mpg on the highway.