For 1990-2009 cars

# RADIO NOISE IN SPEAKER WHEN USING CELLULAR PHONE

#### VEHICLES AFFECTED: 1987-1988 DE VILLES AND FLEETWOODS

Some 1987-1988 DeVilles and Fleetwoods built prior to 1988 VIN breakpoint 248670 equipped with the Bose radio sound system and the Cadillac cellular telephone may experience a loud "pop" over the Bose speakers when turning on the cellular telephone or whenever the audio switches from the radio to the telephone and back again.

To eliminate this "pop", a capacitor has been added to the radio mute module.

To repair this condition, check the service part number of the radio mute module (printed on a sticker located on the housing). If the number is 16055196, replace the module with service part number 16120736.

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.