The 2005 Chevrolet Silverado 2500HD 4 Dr LS 4WD Crew Cab SB HD has a 6.0 L, 300 hp V8 engine with standard 5 speed manual transmission.  This trim has 4 doors, seats 6, and offers standard air conditioning, power windows, power door locks, cd player, and ABS brakes.  Options include sunroof and power/leather seats.  Max towing capacity comes out to 15300 lbs.