The 2006 Chevrolet Silverado 2500HD LT1 2dr Regular Cab 4WD LB has a 6.0 L, 300 hp V8 engine with standard 5 speed manual transmission.  This trim has 2 doors, seats 3, and offers standard air conditioning, power windows, power door locks, cd player, and ABS brakes.  Power seats come as an option.  Finally, towing capacity maxes out at 15800 lbs.