OEM navi installation. Can it be done on RTL?

I have an RTL without the navi. Can I buy the navi and just put it in or does it need a bunch of additional harnesses?

You'd need a lot more than just the unit for the dash. Harnesses are the least of the troubles. There is the nav unit underneath the drivers seat and the climate control is tied into the navigation system too. That's just a couple of the many things that would have to be changed. it would just cost too much to do.

Damn.....:( Thanks anyways. Aftermarket it is i guess:rolleyes: