THE AIR CONDITIONING WAS TOO COLD ON PASSSENGER SIDE - CLOSED VENTS - WHEN COMFORTABLE THEY WERE OPENED ONLY TO FIND THAT THERE WAS NOW HOT AIR COMING OUT. THE NEXT SERIES OF EVENTS TOOK PLACE IN A VERY SHORT AMOUNT OF TIME. THE CONTROL FOR THE HEADLIGHTS WAS DIMMING TO OFF THEN GOING ON, THE AIR CONDITIONING STOPPED WORKING, THE INSTRUMENT PANEL DIGITAL DISPLAY WENT OUT LEAVING NO INDICATION AS TO SPEED. THE PASSENGER NOTICED A GLOW IN THE DOOR PANEL, THIS GLOW WAS A FIRE. I PULLED ON TO THE SHOULDER AND WE GOT OUT. I CALLED *11 INDIANA TOLL ROAD FOR ASSISTANCE AND THE FIRE WAS EXTINGUSTED IN A MATTER OF MINUTES. THE CAR IS NOW AT THE DEALER IN OAK LAWN IL. AND GENERAL MOTORS IS INVESTGATING THE INCIDENT.