ok... I don't care if onstar does not work, I'll look up what I bought for it...
I might as well include the instructions for anybody else doing a install...
Crutchfields - 120701858 Receiver Wiring adapter:
http://akamaipix.crutchfield.com/Man.../120701858.PDF
Mastersheet Instructions 97- Grand Prix:
https://www.crutchfield.com/S-WTEzlp...pdf=0000440080
Amp Wiring Kit Instructions:
http://akamaipix.crutchfield.com/Man...211PSK04BI.PDF
So it says in the mastersheet that if I'm using an existing amplifier (the Bose)
"The factory amplifier can be used with an aftermarket receiver. To do so, connect the power antenna wire from the receiver wiring adapter to the amplifier remote wire"
