The 2007 Chevrolet Silverado Classic 2500HD LS Crew Cab LB RWD has 4 doors, seats 6, and sports a standard 6.0 L, 300 hp V8 engine with max towing capacity of up to 12000 lbs.  You can carry quite a load on the extended 97.6" bed and the gas tank holds 34 gallons.  Think of the LS as one step above the base level Work Truck with its cd player and longer list of options.