The 2006 Chevrolet Silverado 2500HD LT1 4dr Crew Cab LB 2WD 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.  Power and leather seats come as options.  Towing capacity maxes out at 15500 lbs.