1995 GMC Safari Owner's Manual - Page 172

But they won't flash you're braking. if W Press the button in to make your front and rear turn signal lights 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. - To turn off the flashers, pull out on the collar. 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 road the about 300 feet ( 100 m) behind your vehicle.