2003 Chevrolet Avalanche Owner's Manual - Page 165

Hazard Warning Flashers The hazard warning flasher button is located on the top of the steering column. Your hazard warning flashers work no matter what position your key is in, and even if the key isn't in. Press the button to make the front and rear turn signal lamps flash on and off. To turn off the flashers, press the button until the first click and release. 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. When the hazard warning flashers are on, your turn signals won't work. Other Warning Devices If you carry reflective triangles, you can use them to warn others. Set one up at the side of the road about 300 feet (100 m) behind your vehicle. 3-6