BOSE GOLD SERIES CASSETTE RADIOS-WHISTLE NOISE

SUBJECT: 1991 CADILLAC E/K 2000 SERIES BOSE GOLD CASSETTE RADIOS WITH FM BAND WHISTLE NOISE

MODELS AFFECTED: 16126336

SYMPTOM: THE CUSTOMER MAY COMMENT OF A HIGH PITCHED "WHISTLE" OR "WHINE" WHILE LISTENING TO FM.

INSPECTION: IF THE ABOVE RADIO COMES IN FOR REPAIR, INSPECT THE SERIAL NUMBER LABEL FOR A PINK MARK ACROSS THE "1" OF THE MODEL YEAR.

NOTE: ALL EXCHANGE STOCK RADIOS MUST ALSO BE INSPECTED.

IF THE PINK MARK IS PRESENT OR THE SERIAL NUMBER IS ABOVE 1014871, NO FURTHER ACTION IS REQUIRED.

IF THE PINK MARK IS NOT PRESENT OR THE SERIAL NUMBER IS BELOW 1014871, PERFORM THE FOLLOWING MODIFICATION TO THE RADIO.

STEP 1: CHANGE R72 ON THE RECEIVER BOARD (REFERENCE 1990 2V SUPP. #1, PG. V-54) FROM A 1 MEG OHM RESISTOR TO A 10 MEG OHM RESISTOR (P/N 16017968).

STEP 2: MARK THROUGH THE "1" OF THE MODEL YEAR ON THE SERIAL NUMBER LABEL WITH A PINK MARKER.

YOU WILL RECEIVE AN ADDITIONAL .1 HOUR ON ALL IN WARRANTY UNITS WHEN THE ABOVE PROCEDURE IS PERFORMED. WHEN FILING THE AC-DELCO 1078/775 FORM, PUT AN 'X' IN THE LABOR CODE COLUMN AND PUT '101T' IN THE MODEL NUMBER COLUMN.

COPYRIGHT 1990. DELCO ELECTRONICS CORPORATION. ALL RIGHTS RESERVED.

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.