Aux on Factory Xm radio with Nav?

[Paytonmsf]

Hey Guys, I'm sure this has been asked before but all the links I click on in past threads don't go anywhere. I have an 06 GP GXP with Factory XM and Navigation system. (Touch screen) Is there any way I can get an Auxiliary line that will connect to the stereo so I can play music from my iPhone? Doesn't matter if its a straight Aux plug like ear buds or USB. Any help would be appreciated. Thx Guys!

[Impala131]

I just recently added an aux connection to my 04 Impala's radio via XM connector. Mine does not have navigation though, not sure how it's different. I'll try to find the guide I used to learn the basics, though.

[Impala131]

This is what I started with:

http://www.kawal.net/auxinput.htm#Alternative%201

Unlike the guide, I actually took apart the factory head unit and soldered to the XM connectors.