The 2022 GMC Terrain is available as a 4-door, 5-seat sport utility. Starting at $27,900, the 2022 GMC Terrain SLE FWD is powered by a 1.5LL , 4 -cylinder engine mated to an automatic transmission that returns an EPA estimated 25-mpg in the city and 30-mpg on the highway. The top of the line 2022GMCTerrainDenali AWD , priced at $ 36,600 , is powered by a 1.5LL , 4 - cylinder engine mated to an automatic transmission that returns an EPA estimated 25-mpg in the city and 28-mpg on the highway.