1993 Buick LeSabre Owner's Manual - Page 199

Press the button in to make your front and rear turn signal lights flash on and off. Your hazard warning flasherswork no matter what position your key is in, and even the key isn't in. if To turn off the flashers, pull out on the collar. When the hazard warning flashersare on, your turn signals won't work. Other Warning Devices If you carry reflective triangles, you can set one up at the sideof the road about 300 feet (100 m) behind your vehicle. 197