When it comes to the diesel 250/2500 trucks, the limiting factor of its payload is the max 10,000 lbs of the Class 2B that it is in rather than what the trucks can actually handle. This has been proven time and time again. The 2500s in my 2014 model year shared every component with the 3500 except for the rear suspension which had a GAWR of only 500 lbs less yet it's GVWR was over 1500 lbs less because it was maxed out by its class.
This is why I have no worries putting 2,500 lbs on my 2500 even when it is only rated at 1,880 lbs by the door sticker. The police don't go by the door sticker and cannot enforce it where I am from. All they can enforce is what you register your truck as. That little weight rating on the door essentially means nothing here.