WHEN DRIVING AROUND 5 TO 8 MPH WHILE APPROACHING A TURN. VEHICLE RAN INTO VEHICLE IN FRONT OF ME. PEDAL WENT TO THE FLOOR AND WHEN TRYING TO MOVE THE VEHICLE TO THE SIDE OF THE ROAD NOTICED THE BRAKE PEDAL WAS LOCKED TO THE FLOOR. GM ENGINEER DIAGNOSED AS POWER BRAKE BOOSTER AND BRACKET. REPAIRING VEHICLE AT THEIR COST INCLUDING BODY DAMAGE. *TR