Hissing Noise

By AKgmc
June 29, 2009 in 1999-2013 Silverado 1500 & Sierra 1500

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AKgmc

Posted June 29, 2009

When I run my A/C I get a constant hissing noise like a vacuum leak. I have an 05 Sierra 1500. Sound normal?

You can take an empty paper towel roller, place one end to your ear, then point the other end toward the noise and find exactly where the noise is coming from. Then taking a picture of this location or describing it would be helpful.

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