1998 CHEVROLET P SERIES Parking Brakeindicator Light Problems

WHILE DRIVING ON THE FREEWAY, MY AUTO PARK BRAKE FAILED AND BURNED UP BUT THERE WAS NO FIRE. IT HAPPENED TWICE WITHIN 2000 MILES OF EACH OTHER. I WAS LEFT WITH NO PARKING BRAKE OR STOPPING ON A HILL AND EXITING THE VEHICLE WITHOUT THE VEHICLE ROLLING. THE FIRST REPAIR WAS DONE AT A CHEVROLET DEARLER THAT ONLY REPLACED A PREASURE SWITCH. THE SECOND REPAIR WAS AFTER THE FIRST TIME THE BRAKE BURNED UP. THE BRAKE AND VARIOUS OTHER PARKS WERE REPLACED. THE THIRD REPAIR WAS DONE BY THE SAME FACILITY THAT REPLACED THE BRAKE EARLIER AFTER THE SECOND PARK BRAKE BURNED UP. THE FOURTH REPAIR CAME AFTER I LEFT THE SHOP AND HAD DRIVEN 20 MILES AND THE PROBLEM REACCURED. THE FIFTH REPAIR OCCURED ONE DAY LATER AND THE PROBLEM RETURNED AND WAS CORRECTED BY A GM FACILITY IN BAKERSFIELD, CA. THIS COULD HAVE BEEN A SERIOUS PROBLEM IF...