Doing some quick calculations it appears that Chevrolet maybe actually doing the tow ratings the right way on the 3500 drw and are not taking the free pass the SAE test allows. That is performing SAE handling testing while simultaneously achieving GCWR, TV GVWR, and TV GRAWR. By doing this it prevents manufactures from using a minimum TV GVW and bumping up the GCWR way high. A provision in the standard allows manufactures to prioritize GCWR first, then GVWR followed by GRAWR and are not required to meet all three at the same time. This one thing is probably the biggest flaw in the j2807 standard that keeps it from being useful for consumers.
