DRIVING NEWLY PURCHASED 2015 CHEVY SILVERADO 1500 AT 35-45 MPH ON FREEWAY (WHICH HAS A 65 MPH SPEED LIMIT). TRAFFIC AHEAD WAS SLOWING DOWN, AND THE BRAKES WERE PRESSED, SPEED WAS REDUCED, BUT WHEN THE CARS IN FRONT (WITH AT LEAST 5 CAR LENGTHS OF SPACE ) SUDDENLY STOPPED, AND I SLAMMED THE BRAKES, THE BRAKES FAILED. I TRIED AND TRIED PRESSING THE BRAKES, BUT THE TRUCK DIDN'T STOP, AND I REAR-ENDED THE VEHICLE IN FRONT OF ME, WHICH ENDED UP REARING THE VEHICLE AHEAD OF IT, AND SO FORTH. DUE TO THE BRAKES NOT RESPONDING, I WAS UNABLE TO STOP LIKE THE REST OF TRAFFIC, AND THUS, CAUSED AN ACCIDENT. (NOTE: THE WEATHER AND ROAD CONDITIONS WERE FINE, NOT WENT ROAD, AS STATED ON POLICE REPORT.)