Your truck may be listed as 9500 tow cap but the trailer will be right up at that's limit. Also look at your payload cap. 9000 lb trailer should have a tongue weight around 1200 lbs, add another 100 for the wd hitch, plus the weight of the folks travelling with you, and your nearing 2000 lbs with nothing in the bed,
Salesmen will quote you the empty weight of a trailer. The only time that trailer will weigh that, is the day it leaves the assembly floor.
You can check the specifics on your truck, but my first impression is that you would be pushing the truck much harder than you may want to, especially with the 3.42 gearing.