GMC Sierra SLE 2015 Automatic Gasoline mileage: 133 KM 4WD In the name of God, the Most Gracious, the Most Merciful. Original body with partial paint (electricity company logos). Mileage (133) documented with a summary. Additions: Trucool 40,000 BTU transmission cooler. There are scattered dents in the body. Engine guaranteed. Transmission guaranteed. Chassis guaranteed. Airbags guaranteed.