For 1990-2009 cars

# AIR CONDITIONING MOAN/NOISE (DISAPPEARS WHEN A/C IS OFF)

VEHICLES AFFECTED: 1985 Oldsmobile and Buick 'C' Models Equipped With 3.0L or 3.8L MFI V-6 Engines

A moan type noise may be experienced on some early production cars off idle with the air conditioner compressor engaged. The noise disappears when the air conditioning is turned off.

If this condition is diagnosed, replace the compressor clutch with a new clutch of kit #2724325. This kit also contains a new clutch dust cover and attaching screws which must be installed.

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.