GMC Sierra Z71 2012 Automatic Gasoline mileage: 300 KM or more 4WD GMC Sierra 2012, full option, double gear shift. Only three pieces have paint. The additions on the car: Long tube headers WY Electronic tailgate Intake filter Melling oil pump 71c thermostat NGK spark plugs Programmed by Omar Al-Babtain, with cost. The engine heads have been replaced with new original GM heads. The mileage has just passed 300k. Any offer below 30 will not be considered. No set price.