c5 stereo reciever
The factory headunits AUX input is designed for GM's rear mounted CD changer. The radio will not accept L/R audio from this input unless it establishes a serial-data-link with the CD changer.
If you are like me and own a C5 without the rear mounted CD changer, then you can buy a device that tricks the headunit into believing there is a valid CD changer connected to the radio. This then enables the L/R AUX input on the headunit.
here is one such device: P.I.E. GM10AUX
http://www.logjamelectronics.com/piegm10aux.html
I am using the PIE adapter and playing a hard-drive based MP3 player through the factory headunit.
pics of it on my mods page:
http://mikemercury.home.att.net


