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Cold air coming in my Gmc 2500

Discussion in 'Chevy Trucks' started by Big shot, Feb 17, 2004.

  1. Big shot

    Big shot Junior Member
    Messages: 2

    :eek: My 01 Gmc 2500 HD when it's cold and the heat is on. The driverside is very hot and the passenger side has cold air rushing in? The passenger freezes. I don't see any holes in the fire wall.
    Last edited: Feb 17, 2004
  2. flykelley

    flykelley 2000 Club Member
    Messages: 2,127

    My guess is someone pulled the firewall plug and thats where your cold air is coming from.

  3. SnowMatt13

    SnowMatt13 PlowSite.com Addict
    Messages: 1,559

    Is the GMC a model that has dual climate controls? Meaning can you control the temperature on the driver side and the pass. side seperately? They (GM) put this in some of their "fancier" models. If so in your case, maybe the switch is broke that controls the pass. side setting.
  4. Bolts Indus.

    Bolts Indus. PlowSite.com Addict
    Messages: 1,176

    The seal in your heat exchanger box on pass. side is probably out of place. That happens with GM's

    FSUPERDUTY Senior Member
    Messages: 312

    my friends 2001 does this also i always freez when i ride with him there is a bullitein for it and he had it redone but it still leaks cold air!my 2003 doesn't do it though.
  6. flykelley

    flykelley 2000 Club Member
    Messages: 2,127

    Fsuperduty,that odd because my 2001 3/4 HD will run you out of the cab,most of the time I have the blower on speed 1 and heat control about half way. Something is wrong with his truck.