Z71 2011 Automatic Gasoline mileage: 300 KM or more Peace, mercy, and blessings of God be upon you. I present to you a Sierra 2011. 6 cylinder. 4 gears. Black interior. Without 4x4. It has a filter, exhaust. Mileage 460. Airbags deployed completely. It was in an accident and repaired. I don't guarantee anything. The car needs work.