I think I answered my question.
Here is a video I found.
http://www.youtube.com/watch?v=0UT-Z9llRhs&feature=related
Should the battery ground be disconnected before doing this install?
The legal answer is yes, but these are all factory plugs. If you short a wire doing this you have no right working on your own car.
That said, if you aren't confident and/or don't want to risk shorting a wire in your $50k truck, pull the ground on the battery.