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I work for a GM dealership, and referring to this vehicle, that is most often the blower motor starting to fail. If the blower resistor failed, it would probably not blow at all at certain speeds.

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โˆ™ 2006-04-19 12:20:52
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Q: Why does the fan blow air very weak even though it is turned on high on your 01 Chevy Venture van?
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