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heat defrost vacuum pump
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  1. 6.0L Powerstroke Interior Discussion
    I only have air comming from the defrost. So I replaced the Vacuum pump, still nothing. Lines behind the glovebox seem fine and lines going to resevoir and from pump seem okay. lines to hubs seem fine. my Auto 4x4 has never worked since I bought the truck either, and I know my one hub is not...
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