Chevrolet 1999 Express Van, Owner'S Manual, Page: 202 / 378

yellow blue
5-2
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.
Push the button at the top of
the steering column all the
way down to make your
front and rear turn signals
flash on and off.
Your hazard warning flashers work no matter what
position your key is in, and even if the key isn’t in.
To turn off the flashers, push the button until the first
click and release.
When the hazard warning flashers are on, your turn
signals won’t work.