How do I add the 7 wire trailer connector to my Yukon?

[krue]

Have an p4 Yukon without towing package. Looking to add the wiring harness for a 7 wire plug.

[Ironhorse]

Just a thought but have you looked up under the left hand side in the rear bumper / frame area for a bunched wire bundle? Have seen it more than once where GM left a bundle of wire for easy access to add trailer wiring. Maybe you might get lucky, good luck.

[hatzie]

The 2003-2007 has a distribution block with four Metripak plugs;

1. Input from the front.
2. LH lamps output.
3. RH lamps output.
4. Trailer jack wiring.

The 7 position trailer jack and pigtail to plug into the D-Block and are stock GM parts.