GMC Sierra SLE 2020 Automatic Gasoline mileage: 300 KM or more 4WD Peace, mercy, and blessings of God be upon you. For sale GMC Sierra SLE model 2020. Mileage 312,000. The car has been used by me for two years and has no issues. The body has been repainted, the roof is original. Engine and transmission are original. The torque converter was changed due to a manufacturing defect. It has a transmission cooler. May God protect you. The sale is easy for the serious buyer, please. ( Phone number appears when clicking the contact button )