GMC Sierra SLE 2004 Used Automatic Gasoline mileage: 300 KM or more Some additions include fan modification, programming, custom headers, and an electronic Skyline muffler. There are some notes to be mentioned for serious buyers. The engine is clean and guaranteed, and the transmission was recently overhauled and is under a 6-month warranty. The chassis is also clean, except for the body which has been repainted. The AC is icy cold and the tires are clean. The car's mileage is 360, and the registration is valid.