Boasts 27 Highway MPG and 22 City MPG! This GMC Sierra 1500 boasts a Turbocharged Diesel I6 3.0L/ engine powering this Automatic transmission. WINDOW, POWER, REAR SLIDING WITH REAR DEFOGGER, WHEELS, 20" X 9" (50.8 CM X 22.9 CM) MACHINED ALUMINUM with...