Well if it that is the Sierra 2500 Crew Cab with the 6.6 TD, 2WD, a standard bed and a 3.73 rear end then you have a tow rating of 12000 lbs.
The Jayco has a GVWR of 9600 lbs. That is exactly 80% of your truck's rating and is sufficient for towing anywhere in North America, east or west. I cannot find any specs on the Outback in their website, but if the GVWR of that trailer is 9600 lbs or less it should tow just fine.
Other than that, with travel trailers, what you see is pretty much what you get -- for vacation use particularly. The big question is do you like the floorplan and do you find the galley and toilet facilities.