[RustyBlazerDude]

Hyper,
No worries dude, I'll send you a test unit that you can plug into the OBDII connector. I'll put a switch on it for testing that will, in effect, ground the mute wire, and thus send the radio mute command out on to the class2 bus.
If the radio mutes, than all we have to do is get the audio from your moto module into the amp, get mute from moto along with power and ground into my board, and get class2 data bus connected.

You will have to disconnect whatever onstar system you might have since there is alot of handshaking that goes back and forth in the command and having the real unit installed with mine might confuse things a little.

I have a test cable with an OBDII connector on one side and a DB9 that I'll interface to my board, but you gotta make sure I get it back.

This will in affect, act like a class 2 "lockpick".

It may take a little longer to rig something up for you to test, but I should still be able to get you something to try before the week is out.


And you might want to think about getting an onstar mirror off of ebay and loose that cheesy moto controller and external mic going forward...