Question about 2001 GMC Sierra Crew Cab

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A/c heater fan turned on high air volume at vents is low.

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  • amak_46171 Sep 06, 2009

    manuel system. Fan does work on all speeds air volume is low.

  • amak_46171 Sep 06, 2009

    Changed cabin airfilters works fine.

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  • GMC Master
  • 426 Answers

Is this an automatic control or manual system? does it work on any other speed? Im sure we can solve this some more info.

Posted on Sep 05, 2009

  • Donnie Matney
    Donnie Matney Sep 06, 2009

    im not seeing in the information I have here that does or doesnt have cabin filters.open the glove box and attempt to open past the tabs that hold it in, look to see if you have cabin filters you should see a door and it may have one screw holding it. If you do not have you will have to remopve the blower and inspect squirrel cage for debri

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