Hi, This is my first time posting here so if this question has been asked before then I'm sorry.

I have a 2004 GP GT. The car is pretty much loaded with heated leather seats, HUD, Steering wheel contorls, and more. However I'm starting a new job in a couple of weeks and it requires a lot of travel. So I want to put in the factory Nav system. I need to know if I can do it and how. The current stero in the car is a CD & Tape deck player ( I have no Idea why there are tape decks in a 2004) and it is NOT a monsoon system. Can anyone help?