Horn
Pressa 
on the steering wheel pad
to sound the horn.
See also:
Express Down Windows
Windows that have the express&-down feature allow the windows to be lowered without
holding the switch. Press the window switch fully and release it to activate the
express&-down feature. ...
Diagnostics
OnStar Vehicle Diagnostics will perform a vehicle check every month. It will check the engine, transmission, antilock brakes, and major vehicle systems. It also checks the tire pressures, if the vehic ...
Infotainment System Overview
The infotainment system is controlled by using the buttons on the faceplate and
the touch screen. See “Infotainment Control Buttons” in this section for more information.
...