No mine doesn't have it, only the 4-way, Dodge stated you have to order your truck with the seven way, unless it is a 2500.
The wiring harness Tactransam showed you can purchase, which I did, but I have 2 questions:
Doc 1 The wiring instructions state that for 03 and previous wire the violet wire to the black wire VT-BK (the harness has a violet wire) for 04 and beyond wire the WT-LG (white to light green?) how when the harness has a violet wire?
Doc 2 The blue wire comes in the cab (brake control wire) and hooks to what? the cab has a harness for the brake control unit to plug inmto, but I don't see where the blue wire hooks to.