The Chevy Silverado 2500 HD is a Heavy Duty version of the Chevy Silverado 2500. It was available with a five-speed transmission, and in the year 2006, a six-speed option became available as well. This vehicle is designed for hauling things, so the bed can hold nearly 4,000 pounds of weight, and using the hitch, you can tow up to 16,100 pounds behind the Chevy Silverado 2500HD, which is quite a large travel trailer. This truck is also available in four-wheel drive.