Question about 2002 Chevrolet TrailBlazer

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Heat/ac fan works on highest setting only and sometimes not at all

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Highly unlikely it's the switch. It's your resistor on the bottom of the blower motor. Replace this and you will have all speeds again. Very common problem on our TB's.

Posted on Nov 17, 2010

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The switch its self is going out need to change

Posted on Oct 03, 2009

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