hissing heater control

The stock systems

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achmed402
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hissing heater control

Post by achmed402 »

my 2003 ZR5 has developed this annoying hissing noise in the dash somewhere around the heater control. It sounds like a vaccum leak, so i inspected the unit and found nothing wrong with it. ANY ideas would help
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HenryJ
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Post by HenryJ »

Welcome. I would check your transfercase switch first.

Revised transfercase switch *READ THIS THREAD!

I would also check out this one Hissing sound from HVAC

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achmed402
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Post by achmed402 »

REALLY? I never thought of that because it changes pitch when you change the setting.
achmed402
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Post by achmed402 »

thankyou so very much this thing was driving me crazy ill take in asap.