[RustyBlazerDude]

Actually, my kit does look for messages coming in on the class2 data bus. And it will respond to volume controls from the steering wheel.

The mute command is actually quite complicated with lots of handshaking required to set it up properly. That's why it took me since Feb. to get it working properly.

There was also some complexity involved in interfacing with the microphone and button circuitry from the onstar system, not to mention emulating keypad and microphone on the moto side as well. Impedance matching etc.

But it's too soon to toot my own horn. Let's wait for some feebdback from the guys who will be testing it...

And Thu, as i said earlier in this thread, it will not put anything on the nav system screen.