GMC Sierra 2015 Automatic Gasoline mileage: 230 KM 4WD GMC Sierra 2015 Automatic transmission Gasoline Mileage: 230 4WD Body: Guaranteed, has a minor, unnoticeable dent and repair. Color: Red Engine and transmission guaranteed. Note: The torque converter was replaced due to a manufacturing defect at the dealership. The engine just started making a ticking sound. Airbags are guaranteed to be intact.