WOW! this thread has gone crazy! first off no glove box has any towing info (except the manual) that states tow rating, and it definitely will not say anything about a slideout. maybe you found the tag that has the info. about a slide in truck camper?
And secondly as I stated take the dry weight and add approx. 1200lbs to it, that will put you around 6400lbs and with 12% tongue weight that would be right around 800lbs. perfect for a 1/2 ton. not everyone loads their TT to it`s GVWR. maybe some do, but those that do usually have a very low CCC.
It really is pretty simple if you run the numbers.