I have '07 Tahoe with 5.3l 4x4 and no major mods except added air bags in rear coils and it does have the tow button on gear shift. The sticker on hitch reads 5000lbs w/o weight dist hitch and 10000 with. The owners manual reads 6700 or 7700 lbs depending on axle ratio. My scenario is to occasionally tow a tandem axle16' box trailer for Scouts that is between 5000-6000 lbs, less than 100 miles by highway. What is going to break and how do I prevent it? Fyi, the airbags are great if you inflate before loading. Thank you.