FRONT LEFT CALIPER FELL OFF - LOCKED UP WHEEL - DROVE INTO DITCH. THERE WAS ABSOLUTELY NO WORK COMPLETED ON THE TRUCK BRAKES, TIRES, ETC. PRIOR TO THIS OCCURRING. THE CALIPER BOLTS FELL OUT, FOUND ONE ON ROAD, CALIPER LOCKED UP AGAINST CALIPER LOCKING FRONT TIRE AND PULLING TRUCK INTO DITCH. NO INJURY OR DAMAGE TO TRUCK OTHER THAN FLAT SPOT ON TIRE. REPLACED TIRE WITH SPARE. DEALER REPAIRED AND SAID NEVER HAD THAT PROBLEM BEFORE. STILL NOT SECURE WITH TRUCK OR IF ANY OTHERS ARE LIKE THIS? IF GOING AT A FASTER SPEED COULD BE DEADLY! *TR