GMC Sierra Z71 2013 Automatic Gasoline mileage: 300 KM or more 4WD Used GMC Sierra Z71 2013 for sale Automatic transmission Gasoline Mileage: 400 4WD For sale GMC Sierra Z71 2013 full option, selectable 4WD. Original body throughout. Mileage: 415, can be increased. Engine, transmission, chassis, 4WD system, airbags are factory guaranteed. Interior: very clean. The vehicle is a gem for the user, Masha'Allah Tabarak Allah. It has additions / Borla cat-back exhaust and Abu Saqr tuning.