The 2006 Chevrolet Silverado 1500HD LT2 Crew Cab Short Bed RWD has a 6.0 L, 300 hp V8 engine.  Gas mileage comes out to 14 mpg in the city and 19 on the highway.  Max towing capacity comes out to an impressive 10300 lbs.  This trim has 4 doors and seats 5.