See also:

Anti-theft Alarm System
This vehicle may have an anti-theft alarm system. The security light, located in the instrument panel cluster, comes on when the system is arming. ...

End a Call
Push . System responds: “Call ended.” ...

OnStar Personal Identification Number (PIN)
A PIN is needed to access some of the OnStar services, like Remote Door Unlock and Stolen Vehicle Assistance. You will be prompted to change the PIN the first time when speaking with an Advi ...