I was doing a search on a towing harness and found some questions people had. I thought I would post this info up here.

(The first picture)

The picture is of a Factory Towing Harness.

(The second picture)

If you were to remove the drivers side rear quarter panel you will see the harness for the lights and other things. There is a blue plug that is taped down to the harness. This is the Factory plug for the towing harness. Just plug the harness in and go.