Hazard Warning Flashers; Other Warning Devices; Horn - GMC Sierra 2008 Owner's Manual

Hazard Warning Flashers

The hazard warning flashers warn others. They also let
the police and other emergency vehicles know you
have a problem.
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.
3-8
The hazard warning
flasher button is located
on top of the steering
column.
The hazard warning flashers work no matter what
ignition position the key is in, and even if the key is
not in the ignition.
When the hazard warning flashers are on, your vehicle's
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

To sound the horn, press the horn symbols located on
the steering wheel.