600/6000 is with a weight distributing hitch. 500/5000 dead weight capacity. Remember that the Gross Combined Weight Rating is 11,113lbs. and the PF GVWR is 6,113(at least on my '08 V6). This means that to tow 6,000lbs, the vehicle has to be fairly empty. If you load up the PF to the gills, the tow ...