GMC Sierra AT4 2021 Automatic Gasoline mileage: 75 KM Peace, mercy, and blessings of God be upon you. For sale GMC Sierra 2021 AT4 Mileage: 75,000 km, subject to slight increase. Car condition: Engine: guaranteed Gearbox: guaranteed Chassis: guaranteed Body: Two pieces, the bed only. The rest of the body is guaranteed. Please, only serious buyers should call. Contact: 0537182122