Horn
Press 
on the steering wheel pad
to sound the horn.
See also:
Braking in Emergencies
With ABS, you can steer and brake at the same
time. In many emergencies, steering can help you
more than even the very best braking. ...
Your Responsibility
Increase the volume of the radio if the OnStar advisor
cannot be heard.
If the light next to the OnStar buttons is red, the system
may not be functioning properly. Press
and request
a vehicle ...
Care of Safety Belts
Keep belts clean and dry.
WARNING
Do not bleach or dye safety belts.
It may severely weaken them. In a crash, they might not be able to provide adequate protection.
Clean safety belts only with ...