Horn
Press 
on the steering wheel
pad to sound the horn.
See also:
Parking/Turn Signal Lamp
1. Open the hood. See Hood .
2. Remove the parking/turn signal lamp bulb socket from the headlamp assembly
by turning counterclockwise.
3. Remove the bulb from the bulb socket by pulling it straig ...
Navigation
This display is used for the OnStar
or Navigation System Turn-by-Turn
guidance. See OnStar Overview or the navigation manual,
if the vehicle has navigation, for
more information. ...
Perimeter Lights
Press the customization button until PERIMETER
LIGHTS: ON appears in the display. To select
your preference for perimeter lighting, press
the select button while PERIMETER LIGHTS:
ON is displaye ...