I bought my wife her 05 yukon denali (used of course
) she soon talked me into our first trailer (as a married couple) '28 tahoe toyhauler. This trailer fully loaded had the yukon towing at the max rated capacity. We mainly camp in the mountains, but the denali has the 6.0 in it. It was definitely a workout on this rig. But as long as you have your head on straight and watch everything as far as gauges etc. you should be fine. I would definitely advise getting a stabilizer hitch with your purchase tho. (side note) I used this experience to talk the wife into buying my duramax
You will enjoy whatever you go with!