The part numbers for the connector on the pinout page below seem to come back to a 4 cavity Molex part number whereas the diagram and my memory seems to indicate the connectors were the standard 2 cavity connectors used throughout the headliner in the connectors to the lighted vanity mirrors in the G8 sun visor. They are Delphi 150 series 2 cavity connectors.
Mouser has them in singles.
Connector: Delphi 150 series 2 cavity, Male, Black - 12047663
Terminals (2 per connector): Delphi 150 Series tin terminal 18-20 AWG wire size - 12047581
Secondary lock: Female connector secondary lock Delphi 12047665
If your microphone side connector is broken at $10 for an entire new mic assembly maybe better just getting a new one as it will come with terminals made with professional machines for a strong hold. GM part number for the whole mic assembly is : 15241529