Horn
Press 
on the steering wheel
pad to sound the horn.
See also:
Flash-to-Pass
To flash the high beams, pull the turn signal/lane change lever all the way toward
you. Then release it. ...
Automatic EPB Release
The EPB will automatically release if the vehicle is running, placed into gear,
and an attempt is made to drive away. Avoid rapid acceleration when the EPB is applied,
to preserve parking brake li ...
Reporting Safety Defects to theCanadian Government
If you live in Canada, and you believe that your
vehicle has a safety defect, you should
immediately notify Transport Canada, in addition
to notifying General Motors of Canada Limited.
You may c ...