stereo question

[MarK M]

on my Pioneer D1, when a call is placed or recieved the unit mutes the radio/cd you are listening to at the time and goes to phone/onstar.

As for numbers showing up i'm not sure... cause my stock radio the numbers never showed either, so it could be a difference with the moonson system vs the regular.

either way, you'll need to pick up the onstar module which you can find at any local stereo shop.