Scores 22 Highway MPG and 14 City MPG! This GMC Yukon boasts a Gas V8 6.2L/376 engine powering this Automatic transmission. WHEELS, 20 X 9 (50.8 CM X 22.9 CM) ULTRA BRIGHT MACHINED ALUMINUM (STD), TRANSMISSION, 10-SPEED AUTOMATIC electronically controlled with overdrive,... via CarSoup