2008 GMC Sierra 1500 Pickup Owner's Manual - Page 142

Hazard Warning Flashers The hazard warning flashers warn others. They also let police know you have a problem. The hazard warning flasher button is located on top of the steering column. Other Warning Devices If you carry reflective triangles, you can set them up at the side of the road about 300 feet (100 m) behind your vehicle. Horn To sound the horn, press the horn symbols located on the steering wheel. Tilt Wheel Press the button to make the front and rear turn signal lamps flash on and off. Press the button again to turn the flashers off. The hazard warning flashers work no matter what ignition position the key is in, and even if the key is not in the ignition. When the hazard warning flashers are on, your vehicle's turn signals will not work. The tilt wheel lets you adjust the steering wheel before you drive. Raise it to the highest level to give your legs more room when exiting or entering the vehicle. 3-6