What/ do I need & how to install Aux cord on 05 Grand Prix w/ factory radio

[Kdurham]

I have an 05 Grand Prix with the based factory model head unit just single cd option and I want to connect an aux cord to the unit. What do I need to install both the aux cord and the usb cord if the usb is an option. I have searched a good amount and cannot find good info for the install on a factory head unit most results are for the monsoon or a new replacement head unit. If any one has info on it that would be great thank you.

[Tonkin2000GT]

Just buy a fm transmitter from like walmart

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[stealthee]

There are a few various write ups. This is what I found with 30 seconds of searching.

http://www.grandprixforums.net/threa...ighlight=input