See also:

RKE without Remote Start Shown
RKE without Remote Start Shown (Lock): Press to lock all doors. The turn signal indicators may flash and/or the horn may sound to indicate locking, see “Locking Feedback” under Vehicle ...

Setting the Tone(Bass/Midrange/Treble)
AUDIO: Push and release the AUDIO knob until BASS, MID (midrange) (without Bose®), or TREB (treble) displays. Turn the knob to increase or to decrease the tone. The display shows the bass, midran ...

Automatic Crash Response
In a crash, built in sensors can automatically alert an OnStar advisor who is immediately connected to the vehicle to see if you need help. ...