Good basic work truck. This is a 2005 2500HD 4X4, regular cab, 6.0 w/manual trans. The manual transmission helps the fuel economy if you keep your foot light on the gas pedal. The first 3000 miles (first month) has been very satisfactory. Highway fuel economy is been slightly over 17 when running 2300 rpms or less. City average about 13.5. Weekly average of mixed hwy/city about 15. Towing (boat) at highway speeds about 13/14.