The 2005 Chevrolet Avalanche 2500 is available as a 4-door, 5-seat regular side. Starting at $38,420, the 2005 Chevrolet Avalanche 2500 LS is powered by a 8.1L, 8-cylinder engine mated to an automatic transmission that returns an EPA estimated The top of the line 2005 Chevrolet Avalanche 2500 LT, priced at $38,420, is powered by a 8.1L, 8-cylinder engine mated to an automatic transmission that returns an EPA estimated