See also:

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. ...

Resuming a Set Speed
If cruise control is set at a desired speed and the brakes are applied, this shuts off the cruise control. However, it does not need to be reset. Once your vehicle reaches a speed of about 40 km/h ...

Theater Dimming
This feature allows for a three to five second fade out of the courtesy lamps instead of immediate turn off. ...