Where is the flasher in a 1991 Pontiac Grand Prix SE 3.1L?

The Emergency Flasher Button is located on the steering column. It is labeled Hazard Flasher and is a black piece of rectangular plastic that you slide up to put your emergency flasher lights on (easiest with your right hand) and slide downward (towards the floor) to turn your lights off If you mean the flasher relay unit it should be above the passengers feet behind a plastic cover on the underside of the dash.