Cadillac CTS - Manual (Page 160)

Hazard Warning Flashers
Your hazard warning flashers let you warn others.
They also let police know you have a problem.
Your front and rear turn signal lamps will flash on
and off.
The hazard warning
flasher button is located
in the center of the
instrument panel.
Your hazard warning flashers work no matter what
position your key is in, and even if the key is
not in the ignition switch.
Press the button to make the front and rear turn
signal lamps flash on and off. Press the button
again to turn the flashers off.
When the hazard warning flashers are on, your
turn signals will not work.
Other Warning Devices
If you carry reflective triangles, you can set them up
at the side of the road about 300 feet (100 m)
behind your vehicle.
Horn
Press near or on the horn symbols on your
steering wheel pad to sound the horn.
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