Horn
Press 
on the steering wheel pad to sound the horn.
See also:
Climate Controls
The heating, cooling, and ventilation for the vehicle can be controlled with
this system.
A. Fan Control
B. Power
C. AUTO (Automatic Operation)
D. ZONE
E. Defrost
F. Air Delivery Mode Con ...
How OnStar Service Works
Automatic Crash Response,
Emergency Services, Crisis Assist,
Stolen Vehicle Assistance, Vehicle
Diagnostics, Remote Door Unlock,
Roadside Assistance, Turn-by-Turn
Navigation, and Hands-Free ...
Engine Air Cleaner/Filter
See Engine Compartment Overview for the location of the engine air
cleaner/filter.
When to Inspect the Engine Air Cleaner/Filter
Inspect the air cleaner/filter at the scheduled maintenance inte ...