GMC Sierra Z71 2015 Automatic Gasoline mileage: 200 KM 4WD I am presenting a Sierra 2015, full option Z71. Mileage: 200k clean. Body: Agency condition. Engine: Guaranteed. Chassis: Guaranteed. There are minor notes for the serious buyer. Additions: Sports shocks worth 7700 SAR. The highest offer received from a serious buyer is 76,000 SAR.