Question about 1997 GMC Jimmy

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(& Jimmy a/c

I recharged my a/c in my Jimmy a few months ago and it worked great. now it started blowing hot air and the pump is cycling. I put the gauge on it and it jumps fron good charge to over charge and blows hot air. Is something cloged? I can't aford to take it to a shop and would like to fix it myself if possible. were do I start?

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  • LazyDawgs1 Jul 29, 2008

    sorry, it's a 1997 Jimmy

  • LazyDawgs1 Jul 29, 2008

    were would I find the oriforce tube on my truck? I see I can pick 1 up at autozone for $10, but not sure were it is and if it is something I can do myself and not bring it to a shop?



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Ur oriforce tube is most likely plugged

Posted on Jul 29, 2008

  • wyatt connolly
    wyatt connolly Jul 30, 2008

    Many GM vehicles put the AC orfice tube right after the condenser coil. It would typically be near the bottom, almost connected to the condenser. The condenser is the large square radiator type assembly, there will be a wrench fitting inline between it and the evaporator, the evaporator looks like a big silver soup can and may or may not have an a/c charging fitting on it. You can do this yourself, however to fix anything, you have to evacuate the system find the exact problem (it could be a plugged or bad condenser as well) replace and/or repair then vacumn the system and do a complete recharge.



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