Navigation installation factory installation
 

I just picked up a 2004 Excursion. Only improvement I want to make is the installation of a Navigation system.

Like to install a factory Navigation system for a 2004 in it. I have located several but have a couple of questions before I get rolling.

Does the wiring harness have to be modified? or is it ready from the factory?

What additional items will I need. My guess is that a GPS antenna will definitely be needed not sure what else.

I hope somebody here can give me some insight.

Matt