The 2011 GMC Terrain is available as a 4-door, 5-seat sport utility. Starting at $24,500, the 2011 GMC Terrain SLE-1 FWD is powered by a 2.4L, 4-cylinder engine mated to an automatic transmission that returns an EPA estimated 22-mpg in the city and 32-mpg on the highway. The top of the line 2011 GMC Terrain SLT-2 AWD, priced at $31,650, is powered by a 2.4L, 4-cylinder engine mated to an automatic transmission that returns an EPA estimated 20-mpg in the city and 29-mpg on the highway.