Question about 1998 GMC Blazer

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My GM blazer has a weird problem, when i stop the air conditioner blower motor will blow normal and when i give it gas to go the fan motor will slow down and will barley blow. could this be a vacuum leak? If so please let me know or if it is something else I would love to hear your opinion thank u.

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  • dannyharp Oct 01, 2009

    well it gets cold and everything but the blower just slows down when u give it gas. i think it has a vacuum leak and i think that could be the cause of it.

  • dannyharp Oct 01, 2009

    Could u tell me how much a new clutch is and how much a new compressor minght cost? the compressor dose make a noise but it is not loud enough to hear it unless u open the hood. i did not know a compressor would mess with the speed of the blower motor. but im just 19 years old lol. im learning i guess.



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This could be bad compressor clutch or a leak

Posted on Oct 01, 2009

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  • Nate Stansfield
    Nate Stansfield Oct 01, 2009

    It is very likely as well as common. In 8 years of being a mechanic, I've seen it about 5-6 times so far.

  • Nate Stansfield
    Nate Stansfield Oct 01, 2009

    You could go to junk yard and get compressor for $50 or so or new would be $250 or more. Clutch would be $30 used, and $75-$100 new.
    you can put a pressure tester on it to test pressure. Also there should be a glass eye sight somewhere on the pump or compressor. If it is foggy or has bubbles, that would be good sign of air leak.

  • Nate Stansfield
    Nate Stansfield Oct 01, 2009

    you can go to and register for free. Then sign in, choose your car, then go to view repair manual.
    You will have any info you need here like diagrams, step-by-step testing and replacing instrucitons, parts, specs, and more.

    You can also go to and view free chilton manual ebooks in google.



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