Horn
Press 
on the steering wheel pad to sound the horn.
See also:
Installing the Fence
Insert the fence into the adapters and lock both latches (A) by turning to
align with the arrow on the adapter (B). ...
Trip Odometer
The trip odometer can record the
number of kilometers or miles
traveled for up to two trips.
The trip odometer is part of the
Driver Information Center (DIC);
for more information see Driver
...
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 ...