KBB.com Brand Image Awards. Delivers 31 Highway MPG and 21 City MPG! This GMC Terrain delivers a Gas/Ethanol I4 2.4L/145 engine powering this Automatic transmission. WHEELS, 4 - 18" X 7.0" (45.7 CM X 17.8 CM) ALUMINUM (STD), TRANSMISSION, 6-SPEED AUT...
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