SQUEALING AND/OR GRINDING (SCRAPING) NOISE. Pontiac Trans Sport 1997

REVISION: 04/23/97

THIS BULLETIN IS BEING REVISED TO ADD ADDITIONAL MODELS AFFECTED. PLEASE DISCARD CORPORATE BULLETIN NUMBER 73-50-11 (SECTION 5 - BRAKES) ----------------------------------------------------------------------

SUBJECT: SQUEALING AND/OR GRINDING (SCRAPING) NOISE FROM FRONT BRAKES (BEND ABS SPEED SENSOR BRACKET AWAY FROM ROTOR)

MODELS: 1997 BUICK CENTURY, REGAL 1997 CHEVROLET VENTURE 1997 OLDSMOBILE SILHOUETTE 1998 OLDSMOBILE INTRIGUE 1997 PONTIAC GRAND PRIX, TRANS SPORT

CONDITION:

SOME OWNERS MAY COMMENT ON A SQUEALING AND/OR GRINDING (SCRAPING) NOISE COMING FROM THE FRONT BRAKES.

CAUSE:

THIS NOISE MAY BE CAUSED BY THE ABS FRONT SPEED SENSOR CONNECTOR MOUNT BRACKET BEING BENT AND RUBBING ON THE ROTOR.

CORRECTION:

TO CORRECT THIS CONDITION, JUST BEND THE BRACKET AWAY FROM THE ROTOR UNTIL THERE IS A 3 MM (1/8 INCH) GAP BETWEEN THE ROTOR AND THE BRACKET. CHECK THE BRACKETS ON BOTH SIDES OF THE VEHICLE.

IMPORTANT:

DO NOT BEND THE BRACKET ANY MORE THAN 5 MM (.200 INCH) FROM THE ROTOR AS THIS COULD CAUSE THE SENSOR WIRE TO TOUCH THE FRONT WHEEL DRIVE SHAFT.

DO NOT REPLACE PADS AND/OR SERVICE ROTORS.

WARRANTY INFORMATION:

FOR VEHICLES REPAIRED UNDER WARRANTY, USE:

LABOR OPERATION NUMBER: H2532 LABOR OPERATION TIME: 0.3 HR

FIGURES: 00 ATTACHMENTS: 00

GENERAL MOTORS BULLETINS ARE INTENDED FOR USE BY PROFESSIONAL TECHNICIANS, NOT A "DO-IT-YOURSELFER". THEY ARE WRITTEN TO INFORM THOSE TECHNICIANS OF CONDITIONS THAT MAY OCCUR ON SOME VEHICLES, OR TO PROVIDE INFORMATION THAT COULD ASSIST IN THE PROPER SERVICE OF A VEHICLE. PROPERLY TRAINED TECHNICIANS HAVE THE EQUIPMENT, TOOLS, SAFETY INSTRUCTIONS AND KNOW-HOW TO DO A JOB PROPERLY AND SAFELY. IF A CONDITION IS DESCRIBED, DO NOT ASSUME THAT THE BULLETIN APPLIES TO YOUR VEHICLE, OR THAT YOUR VEHICLE WILL HAVE THAT CONDITION. SEE A GENERAL MOTORS DEALER SERVICING YOUR BRAND OF GENERAL MOTORS VEHICLE FOR INFORMATION ON WHETHER YOUR VEHICLE MAY BENEFIT FROM THE INFORMATION.