The 2007 Chevrolet Avalanche 1500 is available as a 4-door, 5-seat regular side. Starting at $32,460, the 2007 Chevrolet Avalanche 1500 LS 4x2 is powered by a 5.3L, 8-cylinder engine mated to an automatic transmission that returns an EPA estimated 15-mpg in the city and 21-mpg on the highway. The top of the line 2007 Chevrolet Avalanche 1500 LTZ 4x4, priced at $36,165, is powered by a 5.3L, 8-cylinder engine mated to an automatic transmission that returns an EPA estimated 15-mpg in the city and 20-mpg on the highway.