RoadtechExplorerDec 24, 20132500 or 3500?I plan on buying a new Chevy Duramax, crew cab, short bed, 4x4, either 2500 or 3500 truck. I will be towing a 10,000 lb GVWR travel trailer (bumper pull). I plan on installing a 50 gallon Transfer Flo...Show More