Hazard Warning Flashers; Other Warning Devices - GMC Envoy 2003 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.
3-6
The hazard warning flashers work no matter what
position your key is in, and even if the key isn't in.
Press the button all the way down to make your front
and rear turn signal lamps flash on and off. To turn
off the flashers, press the button again until it clicks and
then release it.
When the hazard warning flashers are on, the turn
signals won't work.

Other Warning Devices

If you carry reflective triangles, you can set one up at
the side of the road about 300 feet (100 m) behind your
vehicle.
The button for the hazard
warning flashers is located
on top of the steering
column.