See also:

How OnStar Service Works
Automatic Crash Response, Emergency Services, Crisis Assist, Stolen Vehicle Assistance, Vehicle Diagnostics, Remote Door Unlock, Roadside Assistance, Turn-by-Turn Navigation, and Hands-Free Callin ...

If the Off Indicator Is Lit for an Adult-Size Occupant
If a person of adult-size is sitting in the front outboard passenger seat, but the off indicator is lit, it could be because that person is not sitting properly in the seat. Use the following steps ...

MP3 Radio with a Six-Disc CD Player
To set the time and date: 1. Turn the ignition key to ACC/ ACCESSORY or ON/RUN, then press the button to turn the radio on. 2. Press the MENU button and then the softkey under the tab to display H ...