GMC Sierra AT4 2006 Automatic Gasoline mileage: 257 KM 4WD Serra Model 2006 Full option Z71 8 Cylinder Mileage 257,000, can be increased 4x4, differential lock Automatic transmission, 91 octane gasoline It has a Denali engine, overhauled approximately two years ago, and the work is clean. Periodic inspection and registration renewed. Transmission overhauled, and the work is very good. Light spray on the edge of the driver's door