RATTLE/BUZZ FROM THE I/P AREA INSPECT VACUUM CHECK VALVE

SUBJECT: RATTLE/BUZZ FROM INSTRUMENT PANEL DURING BRAKE APPLY/RELEASE (INSTALL NEW VACUUM CHECK VALVE)

MODELS AFFECTED: 1988-92 REGALS

CONDITION:

---------- Some 1988-92 Regals may experience a rattle or buzz type noise which seems to come from the instrument panel area in front of the driver.

CAUSE:

------ A vibration in the vacuum check valve on the power brake booster.

CORRECTION:

----------- To eliminate this noise, install a new vacuum check valve and rubber grommet kit, P/N 18018978.

Parts are currently available from GMSPO.

WARRANTY INFORMATION:

Labor Operation Number: T1812 Labor Time: 0.2 Hour

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.