DRIVING IN HEAVY TRAFFIC ON I 95 SOUTH ON THE WAY TO VACATION, BRAKES FAILED WHEN I ATTEMPTED TO SLOW DOWN. I REAR ENDED ANOTHER VEHICLE. HAD TRUCK IN SHOP FOR WEEK AND FOUND SEVERAL PROBLEMS WITH LINES AND 2 LEAKS. I HEARD THAT THERE IS A KNOWN METAL DEFECT WITH 2001-2004 BRAKE LINES. I CAN'T FIND ANY RECALL INFORMATION. *TR