Question about 1997 GMC Jimmy

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1997 GMC Jimmy 4x4 SLE

I did have heat but all a sudden it stopped working. Completely everything quit working. What could be wrong?

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  • tracygain031 Nov 16, 2008

    I drove the truck this morning and the heat was working. All of the heat settings (low to high) , and also the settings on the on/off switch was working. (vents,legs,face,defrost) Then the settings only worked on the defrost. Then it all just quit. I believe it has to be the on/off switch. But who knows. But that dont explain why the defrost was working. What do you think?

  • yadayada
    yadayada May 11, 2010

    Does the blower fan work, if so on all speeds? Do you have automatic climate control?

  • yadayada
    yadayada May 11, 2010

    I don't know the details of your problem, please explain the issue completely, thanks

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You may have a combination problem. Your system uses electrical/vacumn. The ducts are operated by vacumn being directed to different hoses by the electrical switch. If you can get to one of the hose with the engine running, pull one off of its ports and check for vacumn.
Bill

Posted on Nov 18, 2008

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