2001 Cadillac DeVille Owner's Manual - Page 279

Hazard Warning Flashers The hazard warning button is located on the center of the instrument panel between the two air vents. Press the button in to make the front and rear turn signal lamps flash on and off. The light in the center of the button will flash, indicating that the hazard warning flashers are on. 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. Your hazard warning flashers work no matter what position your key is in, and even if the key isn't in. Press the button again to turn your hazard warning flashers off. When the hazard warning flashers are on, the turn signals won't work. 5-2