Horn
Pressaon 
the steering wheel pad
to sound the horn.
See also:
Other Navigation Services Available from OnStar
OnStar eNav: Allows subscribers to send destinations from Google Maps and MapQuest.com
to their Turn-by-Turn Navigation or screen-based navigation system. When ready,
the directions will be downlo ...
Engine Drive Belt Routing
If the vehicle is a hybrid, see the hybrid supplement for more information. ...
Sensors
The solar sensor located on the
instrument panel, near the
windshield, monitors the solar heat.
The interior temperature sensor,
located on the instrument panel to
the right of the steeri ...