For 1990-2009 cars

# SQUEAK/SQUAWK TYPE NOISE WHEN BRAKE PEDAL DEPRESSED

#### SUBJECT: SQUEAK/SQUAWK TYPE NOISE WHEN BRAKE PEDAL DEPRESSED (REPLACE VACUUM BRAKE BOOSTER)

#### MODELS: 1997-98 CHEVROLET MALIBU 1997-98 OLDSMOBILE CUTLASS 1999 OLDSMOBILE ALERO 1999 PONTIAC GRAND AM

BUILT PRIOR TO VIN BREAKPOINT:

VIN MODEL LOCATION BREAKPOINTS ========== ========================== =============

MALIBU WILMINGTON WY187500 OKLAHOMA CITY W6251325

CUTLASS OKLAHOMA CITY W6346271 ALERO LANSING PLANT C XC300281

GRAND AM LANSING PLANT C XC509065 LANSING PLANT M XM742025

#### CONDITION:

SOME CUSTOMERS MAY COMMENT ABOUT A SQUEAK OR SQUAWK TYPE NOISE COMING FROM UNDER THE DASH AREA WHEN THE BRAKES ARE APPLIED.

#### CAUSE:

THIS CONDITION MAY BE THE RESULT OF THE COMPOSITION/FORMULATION OF THE MATERIAL UTILIZED IN THE MANUFACTURING OF THE REAR SEAL OF THE VACUUM BRAKE BOOSTER.

#### CORRECTION:

REPLACE EXISTING VACUUM BRAKE BOOSTER WITH A NEW ASSEMBLY SELECTED FROM THOSE LISTED BELOW BY VEHICLE MAKE AND MODEL. FOLLOW SERVICE PROCEDURE IN THE APPLICABLE SERVICE MANUAL.

#### PARTS INFORMATION:

P/N DESCRIPTION VEHICLE MAKE/MODEL =========== ===================== ============================

18041443 POWER BRAKE BOOSTER CHEVROLET MALIBU OLDSMOBILE CUTLASS PONTIAC GRAND AM SE

18041444 POWER BRAKE BOOSTER OLDSMOBILE ALERO PONTIAC GRAND AM GT

PARTS ARE CURRENTLY AVAILABLE FROM GMSPO.

#### WARRANTY INFORMATION:

FOR VEHICLES REPAIRED UNDER WARRANTY, USE:

LABOR OPERATION LABOR OPERATION NUMBER DESCRIPTION TIME =============== ===================================== ==============

H1220 BOOSTER ASSEMBLY, VACUUM POWER BRAKE - 1.2 HRS REPLACE

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.

COPYRIGHT 1998 GENERAL MOTORS CORPORATION. ALL RIGHTS RESERVED.