1998 Cadillac STS
Sorry to post this again but for some reason I can't find someones response on this subject awhile back. Well, I located the odd sound coming from under my dash near the parking brake. It was mentioned on certain STS's, the dealer put a small fan to move air over the HVAC sensor by the driver side vent. Is this the culprit on my dashboard (see image)? When the sound (flutter) comes on, this piece vibrates. Thanks Dave D.
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