Horn
Press 
on the steering wheel pad
to sound the horn.
See also:
Leaving After Parking on a Hill
1. Apply and hold the brake pedal while you:
• start the engine,
• shift into a gear, and
• release the parking brake.
2. Let up on the brake pedal.
3. Drive slowly until the trailer is cle ...
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 b ...
Battery Voltage and Charging Messages
BATTERY SAVER ACTIVE
This message displays when the vehicle has detected that the battery voltage
is dropping beyond a reasonable point. The battery saver system starts reducing
certain features ...