Question about 2004 GMC Savana

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AIR CONDITIONER My van is a 4.3 V6 which has front & rear air conditioner. The rear AC works finds. The front AC blows out cool air but the volume is really low even with the fan on high. Out of curiosity I turn the engine and all accesories off and then turned the key forward one notch. I turned on the rear fan and it works fine. I then turned on the front fan and it does not work although it works when I turn on the AC. Any ideas why I'm my air flow is so low in the front but not the rear. I thought it is all one big connected system. Thank you, Dana

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  • r2bigdogs May 21, 2008

    I'll check into that tonight thank you!

  • r2bigdogs May 22, 2008

    I did a little more investigating and found a pair of vacuum hoses on the wiring harness that is located by the passengers side feet. Plugged that ****** in and she's back to pumping out some serious AC.

  • Anonymous Mar 17, 2014

    Front a/c fan doesn't blow, rear works fine

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On most vehicles with front and rear A/C, the two systems are basically independant of each other just sharing the compressor and condensor. It is possible that the Mode Door (controls where the air flow is sent; ie: windshield, vents, floor) is out of adjustment or sticking.

Posted on May 21, 2008

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