The motor on this 2008 GMC 2500 Duramax is mechanically unmodified. It is fitted with an auxiliary fuel tank and fifth wheel rails in the bed. Body and paint are in great shape. Has brand new AT tires. Leather seats for 5 passengers in good condition. Steering wheel mounted controls, aftermarket stereo, premium bose speakers, dual climate control, trailer brake, electric 4-wheel drive toggle, dual heated and powered seats, and a sunroof.