OnStar Description and Operation: Notes

The OnStar® system on this vehicle will be one of two systems, Generation 4 (Gen. 4) or Generation 5 (Gen. 5). Both systems are diagnosed identically, differing only in the audio prompt responses and output voltage to the microphone. To determine which system this vehicle is equipped with, install a scan tool and access the Module I.D. Information screen. The Gen. 4 and Gen. 5 versions of OnStar® both consist of the following components:

• Vehicle Communication Interface Module (VCIM)
• OnStar® button assembly
• Microphone
• Cellular antenna
• Navigation antenna

This system also interfaces with the factory installed vehicle audio system.