JMC 2011 Used Automatic Gasoline mileage: 300 KM or more 4WD Used GMC Sierra Z71 2011 for sale Automatic transmission Gasoline Mileage: 300 4WD Used GMC Sierra Z71 2011 for sale Automatic transmission Gasoline Mileage: 300 4WD The body has cosmetic paint. It has a 40,000 BTU transmission cooler. It had a full service done recently.