GMC Sierra 2021 mileage: 137 KM For sale: GMC Sierra, double, half-option, in excellent condition, mileage 137 thousand. The body is sound, except for paint on the passenger side of the bed with the door and fender, which is a superficial paint job. It was used by an elderly person since new, and then his son. All its papers are sound. Please consider the call times from 4 PM to 10 PM. Only serious buyers should call.