GMC Sierra 2012 Automatic Gasoline mileage: 1 KM 4WD Masha'Allah Tabarak Allah Sierra 2012 Engine replaced with Ls6.0 Mileage 538k, can increase The car has a kit - sound only - installed a month ago The car does not complain of anything, I go with it and come back Contact WhatsApp ( Phone number appears when clicking the contact button )