For 1990-2009 cars

# MOAN OR VIB. WITH A/C ON (INSTALL SUPPORT BRACE)

THIS BULLETIN SUPERSEDES CORPORATION BULLETIN # 736010 AND 736010R DATED 2-6-87 WITH THE FOLLOWING DIVISIONAL BULLETIN NUMBERS: ALL COPIES OF BULLETIN #736010 AND 736010R SHOULD BE DISCARDED.

CHEVROLET # 87-72 DATED FEBRUARY, 1987 GM CANADA # 87-1-107 DATED MARCH, 1987 PONTIAC # 87-1-3A DATED FEBRUARY, 1987

THIS INCLUDES 1985-88 B AND G CARS, 1985-87 F CARS WITH 4.3L, 5.0L AND 5.7L ENGINES WITH C60 IN THE AFFECTED APPLICATIONS.

SOME 1985-88 B/G AND 1985-87 F CARS EQUIPPED WITH V-8 (VIN F, G, H, OR 6) OR V-6 (VIN Z) ENGINES (WITHOUT SERPENTINE ACCESSORY DRIVE) MAY EXHIBIT A MOAN OR ENGINE VIBRATION WHEN THE AIR CONDITIONING COMPRESSOR IS ENGAGED. THIS CONDITION MAY BE CORRECTED BY THE INSTALLATION OF A SUPPORT BRACE TO THE A/C COMPRESSOR MOUNTING BRACKET. REFER TO THE ILLUSTRATION FOR INSTALLATION PROCEDURE.

THE FOLLOWING COMPONENTS WILL BE REQUIRED:

PART NAME PART NUMBER NUMBER REQUIRED __________ ___________ _________________

SUPPORT BRACE 10055819 1 STUD (3/8-16) 14057002 1 BOLT (3/8-16) 9440169 1 NUT (3/8-16) 14057004 1

#### IMPORTANT: THE STUD SHOULD BE COATED WITH THREAD SEALANT, P/N 1052080, PRIOR TO INSTALLATION.

PARTS ARE CURRENTLY AVAILABLE FROM GMSPO.

LABOR OPERATION NUMBER: T1188 LABOR TIME: .4 HOURS

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 1989 GENERAL MOTORS CORPORATION. ALL RIGHTS RESERVED.