The Tow rating is 6700#.
The GCWR is 14,000#
Section 4-62 page 290 in the Manual.
The Manual Is A Must Read, at least once.
A whole lot of good Info. IMHO
But your greatest concern if you did pull this trailer---1800# OVER MFG TOW RATING--and---1000 PLUS POUNDS OVER MFG MAX GCWR, (AT THIS POINT YOUR RIG HAS BECAME ILLEGAL AND UNSAFE!) Your Insurance won't cover you---and you would be liably for everything if something went wrong-- Just not worth the chance..