See also:

Shutting the Engine Off After a Remote Start
To cancel a remote start, do any of the following: - Press until the parking lamps turn off. - Turn on the hazard warning flashers. - Turn the vehicle on and then back off. ...

Ignition Transmission Lock Check
While parked, and with the parking brake set, try to turn the ignition to LOCK/OFF in each shift lever position. The ignition should turn to LOCK/OFF only when the shift lever is in P (Park). ...

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 ...