AM RADIO NOISE WITH DIGITAL CLUSTER

MODELS AFFECTED: 1983 ELDORADO AND SEVILLE

Some 1981-1983 Eldorados and Sevilles vehicles may experience AM Radio Frequency Interference (RFI) that could possibly be caused by the digital cluster power supply. If the digital cluster is diagnosed to be the cause of AM RFI, a new tube and circuit board assembly can be obtained from one of the three AC-Delco Repair Centers (listed below) that have exchange units. When ordering the exchange unit, describe the condition and reference AC-Spark Plug memo "Cadillac RFI Modification" to assure delivery of the correct assembly.

To diagnose the condition to the digital cluster, isolate a station having the RFI condition; the RFI from the digital cluster may tend to fade in and out. With the ignition in the "RUN" position, eliminate all other possible conditions of AM reception interference, such as bad connections or poor grounds. If the RFI persists, quickly switch the ignition from "RUN" to "ACCESSORY" position to eliminate power to the digital cluster. If RFI goes away, replace tube and circuit board assembly (after removal, recheck same station with ignition in "RUN" position).

Authorized AC-Delco Service Centers (Cadillac Digital Instrument Cluster Repair Program)

Service Center Telephone

Auto Electric Radio Local (714) 871-7357 1841 West Commonwealth Toll Free California (800) 321-6970 Fullerton, California 92633 Out of State (800) 321-6969

Specmo Enterprises, Inc. Local (313) 399-7778 2344 North Woodward Avenue Toll Free Michigan (800) 545-7910 Royal Oak, Michigan 48073 Out of State (800) 545-7911

United Radio Service Local (315) 446-5570 2949 Erie Boulevard East Toll Free New York (800) 962-0901 Syracuse, New York 13224 Out of State (800) 448-0944

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.