Hazard Warning Flashers; Other Warning Devices - GMC Denali 2004 Owner's Manual

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.
3-4
Your hazard warning flashers work no matter what
position your key is in, and even if the key isn't in.
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 won't work.

Other Warning Devices

If you carry reflective triangles, you can use them to
warn others. Set one up at the side of the road about
300 feet (100 m) behind your vehicle.
The hazard warning
flasher button is located at
the top of the steering
column.