GMC Sierra SLE 2020 Used Automatic mileage: 111 KM 4WD In the name of God, the Most Gracious, the Most Merciful. The car is clean and solid, and I just changed the oil for the gearbox, engine, and radiator water, and checked it. Engine: The heads have been disassembled and reamed. Gearbox: Original. Body: Three pieces. Engine: 6 cylinders. For sale to the highest bidder. The highest bid reached 80.