Towing with a 2016 GMC Yukon Denali

Lord Tunderin'. Ok thanks for the input guys. So maybe I do have to go down the rabbit hole. And its like a weakest link in the chain scenario and from what I've read here and in a couple other threads the weakest link is likely the down force on the hitch. And yes your right I do not want to learn the hard way while going through the mountains with my family. But I do know my brother (who is almost as ignorant as I am about this) pulls his maybe 20% heavier TT through the mountains with just a WD hitch plus anti sway in an older model Yukon and so far all good. But I better learn this properly. So I should I go to another link and read up or should we get me set up properly here?
*No I'm not in Guam but I dont like all the info they want from me just to join a forum!