GMC Sierra 2015 Automatic Gasoline mileage: 141 KM Peace be upon you. I am offering a 2015 GMC Sierra, modified to 2018. Mileage: 140,000. Engine: original. Gearbox: original. Chassis: original. Airbag deployed for the driver only due to a slight impact on the left fender, and a new fender was replaced. As far as I know, the body has paint on the left fender, paint on the hood, and scattered paint on the rest of the body due to scratches, but no accidents. Not yet appraised.