ive got an 06 chev 1/2 ton ext cab with the heavyduty z71 suspension (bigger brakes) and trail tow package and like yours, 9600 gvw. my trailer is 26' total length, 6500 max weight, about 700 on the tongue. with my trailer loaded with water and supplies and a couple hundred pounds of firewood in the bed, i certainly knew the trailer was back there. it would pull fine, but the truck would squat slightly with the load, even with wt distribution system. i added the airbags on the rear axel which helped greatly. however, i dont think i would want to try to tow anything heavier than what i currently have. if i was to go as heavy as you are thinking, i think i would have to seriously consider a 3/4 ton, and heavy duty at that.