AUX input on GM Radios

I've got the Pacific Accessroy Corp AAI-GM24 unit in my '05 Grand Prix GXP with premium sound and XM. I had to disconnect the XM receiver to get it to work properly but others have had success without doing so. Since you don't have XM it's not an issue but I'm not sure if the unit will work on a headunit that is not designed to accept audio from an external source. You may need one of their other products. Check them out at

Scott,

Thanks for the info.

My hope is that since there are really only 3 or 4 stock radio headunits (UC1, UC6, the one that adds MP3 and the Nav Unit) That I can just attach something like that to the XM or Changer input and have the radio think that it has the XM on there.

Or does someone know if the XM capability is programmed in the radio at the factory?

Thanks again,

---Matt