1994 GMC Jimmy Owner's Manual - Page 204

Hazard Warning Flashers Your hazard warning flashers let you warn others. They also let police know you have a problem. Your front and rear turn signal lights will flash on and off. I Press the button in to make your front and rear turn signal lights flash on andoff. Your hazardwarning flashers workno matter what position your key is in, and even if the key isn't in. To turn off the flashers, pull outon the collar. When the hazard warning flashersare on, your turn signals won't work. 5-2