Horn
Press 
on the steering wheel pad to sound the horn.
See also:
Battery Voltage
This display shows the current
battery voltage. The vehicle's
charging system regulates voltage
based on the state of the battery.
The battery voltage may fluctuate
when viewing this informat ...
Retained Accessory Power (RAP)
The following vehicle accessories can be used for up to 10 minutes after the
engine is turned off:
Audio System
Power Windows
OnStar System (if equipped)
Sunroof (if equipped)
These fea ...
Security Light
The immobilizer light should come on briefly as the engine is started.
If it does not come on, have the vehicle serviced by your dealer.
If the system is working normally, the indicator ligh ...