OnStar Description and Operation: Notes
WARNING: This page is about a different car, the 2002 Buick Regal and 2002 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.
The OnStar® system on this vehicle is the F1 system. The system consists of the Vehicle Communication Interface Module (VCIM), navigation antenna, cellular antenna, microphone and OnStar® button assembly. The systems also interface with the vehicle audio system.