I just was looking into the newer 17 2500hd. Why is that the towing capacity has gone down compared to my 13. My rating for 2500hd crewcab 4x4 says 15800 on the 2013. The newer 17 is now 13500. is it ...
Agreed it is not an apples to apples compare. Your new truck is likely far more optioned out, and/or there are different engine/transmission combos.
I just moved to a GMC 1500 (2017) from a 2004 and the towing capacity jumped from 7,000 to 9,100. It could have gone to 12,000 if I had purchased the max tow package.