ABS BRAKES DO NOT AND HAVE NOT WORKED PROPERLY SINCE THIS VEHICLE WAS FIRST PURCHASED (STILL ORIGINAL OWNER). SPEED SENSITIVE STEERING DOES NOT AND HAS NOT WORKED PROPERLY AS WELL. THOUSANDS OF DOLLARS $$$ HAVE BEEN SPENT AT THE ORIGINAL DEALERSHIP AND AT QUALIFIED AUTOMOBILE SERVICE REPAIR CENTERS CONTINUALLY REPLACING PARTS AND SOMETIMES THE SAME PARTS OF THE YEARS, THIS CONTINUES TO THIS DAY EVEN THOUGH THE SUBURBAN IS IN EXCELLENT CONDITION AND WELL TAKEN CARE OF. THIS INCLUDES MASTER CYLINDER, BRAKE PADS, CYLINDERS, ETC. THIS BRAKING DEFECT SEEMS TO BE EXPERIENCED BY MANY OWNERS OF THE 1997 GMC SUBURBAN C1500. WHY HASN'T SOMETHING BEEN DONE BY GM ENGINEERS TO LOCATE AND FIX THIS PROBLEM? *NM