Horn
Press 
on the steering wheel pad to sound the horn.
See also:
OnStar Overview
If equipped, this vehicle has a comprehensive, in-vehicle system that can connect
to a live Advisor for Emergency, Security, Navigation, Connection, and Diagnostic
Services.
The OnStar system s ...
Traction Control System (TCS)/StabiliTrak® Light
The StabiliTrak or Traction Control
System (TCS) indicator/warning
light comes on briefly when the
engine is started.
If the light does not come on, have
the vehicle serviced by your dealer ...
Daytime Running Lamps (DRL)
Daytime Running Lamps (DRL) can make it easier for others to see the front
of your vehicle during the day.
Fully functional daytime running lamps are required on all vehicles first
sold in Canada ...