Z71 2015 Automatic Gasoline mileage: 300 KM or more 4WD For sale: Sierra model 2015, clean, no issues, mileage 320. Body is original. Spark plugs and lifters have been changed, which is a manufacturing defect in GMCs. Transmission is original, airbags are original. Please do not undervalue the car. The highest offer reached 60. Do not consider offers below 60.