Dec. 2010 I decided to purchase a truck with the plans of purchasing a fifth wheel toyhauler shortly after. I started to research trucks and their towing capacity. I have always been partial to Chevrolet so I went to a chevrolet dealership here in Arizona, and started looking through the General Motors (GM) marketing catalogs in the dealerships showroom. I was trying to decide between a 4WD 3500HD SINGLE REAR WHEEL truck or the 4WD 3500HD DUAL REAR WHEEL truck. The catalog stated that the SRW could tow a max cap of 21500 lbs and it stated that... read full review »