Dollar for dollar, the Chevy Silverado 2500 HD may be the best heavy-duty pickup truck on the market--and the 2011 model is its best incarnation yet. The Silverado 2500, the model we recently test-drove, and the even heftier Silverado 3500, have a new fully boxed ladder frame, beefed-up brakes and suspension, greater towing and payload capacities, more convenience and work features, and a massively powerful optional diesel engine. They're also safer and get better mileage than before. Of course, a lot of people who buy these trucks don't really need their massive capabilities. But if you have a heavy trailer or boat to tow, or big-time hauling to do, the Silverado HD is an excellent choice.