WHILE DRIVING ON CITY STREETS , I WENT TO STOP BEHIND A CAR AT A STOP LIGHT AND THE BRAKES WENT TO THE FLOOR WITH NO WARNING. I HIT THE CAR FROM BEHIND AND LUCKILY NO ONE WAR INJURED BUT MINOR DAMAGE TO THE REAR OF THE CAR WAS OBSERVED. AFTER THE INCIDENT, OIL CONTINUED TO LEAK FROM THE LINE UNDER DRIVER SIDE DOOR, THE WARNING LIGHT DID COME ON BUT AFTER THE ACCIDENT HAD ALREADY OCCURRED. THIS WAS THE FIRST FAILURE. BRAKE LINE WAS REPAIRED AND A YEAR LATER, THE SECOND BRAKE LINE FAILED ON MAY 23, 2014. WHILE PULLING BOAT OUT OF BOAT RAMP, I WENT TO STOP THE TRUCK AND THE BRAKE PEDAL WENT TO THE FLOOR AGAIN , LUCKILY NOT GOING FAST OR DOWN AN INTERSTATE. AGAIN THE LEAK WAS FROM UNDER THE DRIVER SIDE DOOR, BUT WAS THE OTHER PARALLEL LINE GOING TO THE ABS BLOCK. THIS IS A SERIOUS SAFETY ISSUE AND I WAS VERY LUCKY TWICE. ALL BRAKE LINES WILL BE REPLACED WITH STAINLESS STEEL LINES. I WILL NOT BUY ANOTHER GM PRODUCT UNLESS THEY MAKE THIS RIGHT. *TR