GMC Sierra SLE 2009 Automatic Gasoline mileage: 243 KM GMC Sierra 2009 without 4x4, 8 cylinders. Clean and economical on gas because it's without 4x4. Mileage 247k. Inspected, renewed, and ready for transfer. Engine, gearbox, and body are guaranteed, God willing. It has a set of new tires.