I WAS PULLING INTO WORK AND BRAKE PEDDLE GOT STIFF THEN NO BRAKES I WAS BAKING INTO PARKING SPOT AND CONCRETE WALL STOPPED THE TRUCK I TOOK IT STRAIGHT TO THE DEALER AND THEY SAID VACUUM PUMP AND BRAKE BOOSTER NEEDED TO BE REPLACED A SERVICE BULLETIN WAS OUT FOR IT BUT WAS NOT UNDER WARRANTY AND IT WOULD COST $1000 DOLLARS TO FIX IT 68,000 MILES ON THE TRUCK THIS HAPPENS AT 15 MPH IF SOMEONE WOULD HAVE BEEN IN FRONT OF ME IT COULD HAVE KILLED THEM