I agree with most of the comments. Too much trailer for a 1/2 ton anything really, with very few exceptions. A half ton burb can tow though.
My dad had a 1982 burb 1/2 2wd with the 350 in front of a 1978 terry Taurus 24' tt which was very heavy. It towed it ok, but i remember my dad would avoid the big mountains with it.
My bil has a 2005 1/2 ton burb with a keystone outback tt, i think 21' with the rear queen slide. It tows good for him.
My tt is between 5-6k loaded and the 15 Chevy Silverado i had towed it ok. 5.3/3.42. However i always felt it could do another 1k lb loaded weight but not much more. I like having a good amount of reserve.
Even if your loaded weight is 8500, I'd not have wanted that behind my Chevy. Good luck.