Horn
Press 
on the steering wheel pad
to sound the horn.
See also:
Setting Cruise Control
Cruise control will not work if the parking brake is set, or
if the master cylinder brake fluid level is low.
The cruise control light on the instrument panel cluster
comes on after the cruise co ...
Place a Call Using a Stored
Number
1. Push . System responds:
“OnStar ready.”.
2. Say “Call <name tag>.” System
responds: “OK, calling
<name tag>.” ...
Driving on Grades
Reduce speed and shift to a lower
gear before starting down a long or
steep downgrade. If the
transmission is not shifted down, the
brakes might have to be used so
much that they would get h ...