The 2006 Chevrolet Silverado 2500HD LT1 4dr Extended Cab LB 2WD has a 6.0 L, 300 hp V8 powertrain 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 power and leather seats.  Finally, max towing capacity comes out to 15700 lbs.