2006 Automatic Gasoline mileage: 250 KM 4WD Peace, mercy, and blessings of God be upon you. Hummer for sale, model 2006. The engine had a cylinder head gasket issue and I fixed it. Engine, gearbox, and double (4x4) are clean. The car's interior has been refurbished. I drive the car back and forth, and everything is fine with it.