GVWR is easily busted with about any camper/trailer especially if you have a older 2500 (pre 2010ish). The GVWR on my dad's 06 truck (same as my sig truck but 06 and 2500) is 9000lbs.. my truck weighs 8430lbs right now with standard stuff in the tool box, empty bed, full fuel and no driver. Based on the BS GVWR a 2500 would only have a useful payload of 570lbs and my 3500 is only 1470.... Something is wrong there, and probably why the current version of my truck has a 12,300 GVWR.
I do know that Dodge used the same frame on my generation for a QC LB 2500 Hemi as a 3500 DRW Diesel, which was rated at 12,300. So as long as I don't exceed tires or 12,300 I don't worry. With the 19.5's I am good for as much as I can feasibly throw at it. Most camping trips put me at 10,300-10,800 GVW and I have been as high at 11,200 without a trailer.
Point being is know the ratings, even if they aren't what is on your paper/door, for the parts being used. My frame and axles are given ratings on DRW's that are much higher than my SRW so with proper mods it's easy enough to make it all work SRW.