1994 Buick LeSabre Owner's Manual - Page 185

Press the button in to make your front and rear turn signal lights flash on and off. To turn off the flashers, pull out on the collar. Your hazard warning flashers work no matter what position your key is in, and even if the key isn't in. When the hazard warning flashers are on, your turn signals won't work. Other Warning Devices If you carry reflective triangles, you can set one up at the side of the road about 300 feet (100 m) behind your vehicle. 183