IIHS Top Safety Pick. Only 113,209 Miles! Delivers 23 Highway MPG and 16 City MPG! This GMC Terrain delivers a Gas/Ethanol V6 3.6L/217 engine powering this Automatic transmission. WHEELS, 4 - 17" X 7.5" (43.2 CM X 19.1 CM) PAINTED ALUMINUM (STD), TRA...