The 2007 Chevrolet Silverado Classic 2500HD LS Crew Cab RWD has 4 doors, seats 6, and owns a 6.0 L, 300 hp V8 engine.  Towing capacity maxes out at 12000 lbs.  Keep in mind that this trim has a shorter 78.7" bed than the 97.6" LS Crew Cab LB.  Think of the LS as one step above the base level Work Truck with its cd player and longer list of options.