The owners manual describes all of this (total load capacity vs trailer weight rating) clearly in the vehicle load limits section
relevant info (straight from the owners manual)
Definitions:
GCWR (gross combination weight rating) - total gross weight of vehicle and trailer
GVWR (gross vehicle weight rating) - total gross vehicle weight + tongue weight of trailer
GAWR (gross axle weight rating) - gross weight on each axle (tongue weight factors info this)
TWR (trailer weight rating) - gross trailer weight including trailer and cargo
Tongue Weight - the vertical load placed on the trailer hitch
Weight Limits
- The gross trailer weight must never exceed the TWR described in the table
- The gross combination weight must never exceed the GCWR described in the table
- The gross vehicle weight must never exceed the GVWR indicated on the Certification label
- If the gross trailer weight is over the unbraked TWR, trailer service brakes are required
- If the gross trailer weight is over 2000 lb (907 kg), a sway control device with sufficient capacity is required
Info from table in section 4-1, page 197:
2WD - Braked TWR 5,000 lbs, GCWR 11,100 lbs
4WD - Braked TWR 5,000 lbs, GCWR 11,300 lbs
*Unbraked TWR - 1,655 lbs
Trailer Tongue Weight
- A recommended tongue weight varies in accordance with the types of trailers or towing described as below
- To ensure the recommended values shown below, the trailer must be loaded by referring to the following instructions
-Tongue Weight - The gross trailer weight should be distributed so that the tongue weight is 9% to 11% (tongue weight / Gross trailer weight x 100 = 9% to 11%)