DRIVING TO WORK. DRY CONDITIONS. HAD 4-5 CAR LENGTHS BETWEEN ME AND CAR IN FRONT OF ME. CAR IN FRONT OF ME STOPPED. I WAS GOING ABOUT 30-35 MPH. TRUCK WOULD NOT STOP. ABS DID NOT COME ON AND WHEELS DID NOT LOCKUP. I REAR ENDED THE TRUCK IN FRONT OF ME. IT FELT LIKE THERE WAS NO BRAKING POWER AT ALL. BRAKE PEDAL WAS TO THE FLOOR. TRUCK JUST SLOWLY SLOWED DOWN. THERE IS DEFINITELY A PROBLEM WITH THE BRAKING SYSTEM. *NM