ON MULTIPLE OCCASIONS AND ON BOTH MY CHEVY TRUCKS THE ABS MODULE WILL INTERMEDIATELY MALFUNCTION AND WHILE THE LIGHT COMES ON THE ABS BRAKE DO NOT WORK. WHILE TRAVELING SOUTHBOUND ON I95 IN RICHMOND VA I WAS IN THE LEFT LANE TRAVELING WITH TRAFFIC, WHEN A CAR STOPPED SUDDENLY OVER CONFUSION OF THE EXIT SIGNS FOR I895. THE 2013 AVALANCHE IN FRONT OF ME STOPPED HARD AND WAS ABLE TO TURN AWAY FROM THE STOPPED CAR, MY FRONT BRAKES LOCKED UP WHICH RENDERED STEERING AWAY USELESS. I HIT THE AVALANCHE IN THE RIGHT REAR WITH MY LEFT FRONT. THIS CAUSE $8,000 WORTH OF DAMAGE TO MY VEHICLE AND $5700 IN DAMAGE TO HIS. LATE LAST YEAR MY 2002 SUBURBAN STARTED EXPERIENCING THE SAME PROBLEMS. THE GM DEALERSHIP I WENT TO TOLD ME IT WAS A NORMAL WEAR AND TEAR PROBLEM AND WANTED $1,200 TO REPLACE THE "DEALER ONLY SUPPLIED" PART. THIS IS A PART THAT CAN WORK/ NOT WORK AT ANY MOMENT. MY ABS KICKED IN THEN LOCKED UP WITH THE ABS AND BRAKE WARNING LIGHTS COMING ON WHILE THE ACCIDENT WAS HAPPENING. *TR