The 2017 GMC Acadia is available as a 4-door, 7-seat sport utility. Starting at $29,070, the 2017 GMC Acadia SL FWD is powered by a 2.5L , 4 -cylinder engine mated to an automatic transmission that returns an EPA estimated 21-mpg in the city and 25-mpg on the highway. The top of the line 2017GMCAcadiaDenali AWD , priced at $ 47,070 , 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 25-mpg on the highway.