I went back and weighed the 2005 Suburban and found 3660 on the front and 3280 on the rear. I contacted Andersen who is sending me a compression chart of in ches of compression to lbs of pull on the chains. I am hoping to gain the difference of what I see as 360-380 lbs or most of it by a couple more threads of compression on the urethane springs.
Where does the claim that the stock Chevy hitch absorbs weight distribution come from. I had the hitch checked an all is in order as far as loose or craced welds.