GM Service Manual Online
For 1990-2009 cars only

The hazard warning flashers warns others that you have a problem. The button is located near the center of the instrument panel.

Press to make the front and rear turn signal lamps flash on and off. Press again to turn the flashers off.

The hazard warning flashers work no matter what mode the ignition is in, even if the ignition is turned off.

When the hazard warning flashers are on, the turn signals will not work.