No. The factory receiver is a Class III/IV receiver, and you're reading the label related to Class III use without a weight distributing hitch. Get a weight distributing Class IV draw bar and you can tow the max for the truck.
Tractor Supply sells a solid steel 1 piece bar and ball mount rated at 10K - no threaded screw and nut to mount the ball - just one solid welded piece of steel. I use the 2 5/8" ball to tow the max my Titan can handle on a regular basis attached to the factory big tow class IV hitch - truck is a 2005 CC 4x4