The 2007 GMC Acadia is available as a 4-door, 7-seat sport utility. Starting at $29,255, the 2007 GMC Acadia SLE-1 FWD is powered by a 3.6L, 6-cylinder engine mated to an automatic transmission that returns an EPA estimated 18-mpg in the city and 26-mpg on the highway. The top of the line 2007 GMC Acadia SLT-2 AWD w/4SB, priced at $37,370, is powered by a 3.6L, 6-cylinder engine mated to an automatic transmission that returns an EPA estimated 17-mpg in the city and 24-mpg on the highway.