You can "pull" anything. The problem is what can you "carry".
You have a GVWR of 11,500 and a actual weight of 9,020. Thus your limited to an additional 2,450 lbs. Figuring 200 lbs for a hitch (more or less) that leaves you with 2,250 lbs of carrying capacity.
2,250/.20 (pin weight loaded, generally) gives you a 5th of 11,250. If you don't heavily load the trailer, look for one with a lower than 20% pin weight, you should be able to go 12,000 GVWR on the trailer.
At least, that is how the figures work out. The high towing weight is based on an XL. And all the company's do this. Makes them crow about numbers you will never actually be able to use.
