Truck and trailer weight questions
I have this same truck pretty much. You will need a cdl because your combined gvwr is over 26000lbs, with a 10k trailer you'll be over. If not towing the trailer, you'd be fine.
The gvwr on that truck should be around 20k. You'll need a class b cdl.
If towing a trailer over 10001 lbs you'd need class a cdl.