The 2006 Chevrolet Silverado 2500HD LS 4dr Crew Cab 2WD LB has a 6.0 L, 300 hp V8 powertrain with 5 speed manual transmission.  This trim has 4 doors, seats 6, and offers standard air conditioning, cd player, and ABS brakes.  Power door locks come as an option.  Finally, towing capacity maxes out at 15500 lbs.