Pontiac 1999 Firebird - Manual (Page 212)

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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.
Press the button in to make
your front and rear turn
signal lamps flash on
and off.
Your hazard warning flashers work no matter what
position your key is in, or even if the key isn’t in.
To turn off the flashers, pull
out on the collar.
When the hazard warning flashers are on, your turn
signals won’t work.