[hyperboimmv]

Because I don't have the onstar buttons on my mirror. The 98 didn't come with onstar except as a hand-held phone option/kit. Basically I would test/buy your board from you, only to use its ability to detect the off hook status of the motokit and send audio and class2 data to the radio to mute and what not. The current onstar setups have two connectors. If I am understanding my schematic correctly, I have one connector, and it was for an optional integrated phone kit that caused the steering wheel controls to go from having temp up/down and fan up/down to temp up/down and send/end.

That makes me wonder, CadillacSTS2003, would I have to have the dealer use the tech2 to tell the car that there is the cellular kit installed before this works? Or do you think that if it gets a mute signal, it will just work?

RustyBlazerDude, I would certainly appreciate any info you give me. Anything that gets me closer to the options I want my car to have is excellent.