is the nav unit separate from the audio system? i wanna change head units to a pioneer avn-p3200bt but keep my factory nav. will everything work like it should? any and all help would be appreciated. thanks

 

Yes, it is doable: https://g35driver.com/forums/5036315-post3.html
Though regarding the specific requirements and instructions on how to make both work, I'm not entirely sure...

 

The voice won't continue to work without taking extraordinary measures, or if you're quite electrically inclined, a very basic relay circuit.

Otherwise, there's a little bit of extra work to get the stuff fitting perfect, but all the wiring is separate from the main radio harness.

If you're looking to do it like over a month from now, I'll probably have pictures, instructions, and probably even video of the whole process.