You can start with adjusting your WDH. A trip to the CAT scale can also clue you in. I suspect you are over 9000 pounds loaded and have closer to 1100 pounds of loaded TW. That will remove over 400 pounds from the front axle which causes instability so properly adjusting the WDH is very important for your combo. The air bags can easily mask the WDHH adjustment, but does not restore any weight to the front axle.
I think you will find your truck is at least 500 pounds over GVWR, a couple hundred pounds over rear axle.