GMC Sierra Z71 2015 Automatic Gasoline mileage: 238 KM 4WD 2015 Sierra for sale Transmission, engine, chassis are guaranteed. It has a Canadian 40,000 BTU transmission cooler and Bilstein shocks. I just installed a new bed cover and a set of tires. The interior is new and the original factory plastic is still on. The car has a light dent on the side with no paint, and the rest of the car is factory. Asking price is 73,000. No trades accepted.