Question about 1998 GMC Sonoma

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I HAVE A VACUM LEAK NOISE COMMING FROM MY IN DASH CLIMATE CONTROL I CHECKED THE HOSES AND ARE FINE CAN IT BE THE SWITCH ITSELF?

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  • Anonymous Aug 20, 2008

    I have the same vacuum leak noise from about the same place. Only when the vehicle is running. Lasts for a couple of seconds when vehicle turned off. Does not change when engine in nutral and reved up a bit. May change a bit when put in gear and accelerating. Any thoughts?? Thanks.

  • Charles Max LeMire Aug 20, 2008

    I have the same leak sounding noise. All the controls seem to work fine. Only happens with engine running. Does not change when in neutral and engine is reved up a bit. Seems to change some when vehicle is in gear and accelerating. Any thoughts? Thanks.

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1 Answer

It may be the actuators that control the vents charging up on vacuum and adjusting to position, it may be a normal noise

Posted on Aug 31, 2008

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Since you've already had a fuel pump replaced, I hope your mechanic does some stuff for free for you, since he didn't fix the problem. Otherwise I'd look at going to a dealer - more expensive, but much more likely to find the real problem.

Good luck, hope this helps!

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