Buzzing Noise on Strong AM Radio Stations - kw antenna band distort speaker static station U2S YQ2

The following diagnosis might be helpful if the vehicle exhibits the symptom described in the PI.

Some customers may comment on a buzz type noise heard only on strong AM Radio stations. The noise sounds similar to a blown speaker. Condition is only present on "Non-Navigation" radios (RPO U2S or YQ2).

Replace radio with updated part number.

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Please follow this diagnosis process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed. If these steps do not resolve the condition, please contact GM TAC for further diagnostic assistance.

(05 Cadillac STS)

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