GMC Sierra 2017 mileage: 1 KM GMC Sierra double cabin 2017 Body condition: intact as in the pictures, only the rear left fender piece has been replaced at the agency. Engine: guaranteed, no issues. Gearbox: The gearbox module has been replaced, and its condition is now excellent with no issues. This model has a manufacturing defect in the gearbox module. Mileage: 240,000 km Installed a Canadian 40,000 BTU transmission cooler.