WAS DRIVING HOME FROM WORK. SMELLED SOMETHING HOT, THEN SMOKE CAME OUT VENTS, WITHIN LESS THAN A MINUTE FLAMES WERE COMING OUT FROM UNDER PASSENGER'S SIDE DASH. HAD TO PULL OVER AND PUT OUT FIRE WITH FIRE EXTINGUISHER. IF THERE HAD BEEN A PASSENGER LIKE MY CHILDREN THEY WOULD HAVE BEEN SEVERELY BURNED OR KILLED.I AM A GM TECHNICIAN AND THE FUSE FOR THE HVAC DID NOT BLOW AND TAKING AWAY POWER DID NOT STOP THE ISSUE. I KNOW THAT THERE ARE ISSUES WITH THE RESISTOR WIRING. MY VEHICLE SYSTEMS ALL WORKED FINE BEFORE THE INCIDENT AND GAVE NO INDICATIONS OF FAILING. THIS INCIDENT HAPPENED FAST ENOUGH THAT THE VEHICLE WOULD HAVE BEEN TOTALLY IN FLAMES IF A FIRE EXTINGUISHER WAS NOT RIGHT HANDY. YOU ARE AWARE OF THIS ISSUE WHY IS NOTHING BEING DONE ABOUT IT. GM IS VERY LUCKY THAT I DID NOT HAVE A PASSENGER TONIGHT. *JS