Chirp in A/C vent

By lsu-sec
June 28, 2002 in 1999-2013 Silverado 1500 & Sierra 1500

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lsu-sec

Posted June 28, 2002

Has anyone heard a high-pitched chirp coming from the A/C vents? (2001 GMC Sierra) It seems that if I turn the blower on high and then back down to 1 the noise goes away temporarily.

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