Question about 2002 Chevrolet Silverado 1500

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Vent fan running all the time even with key out of switch

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You have a bad blower motor relay, when the relay goes bad. It can freeze in the on position keeping the contact closed to run your blower motor. Inspect the blower motor relay and wire harness for any short due to burnt wire, this is a common issue with that year of Silverado's
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Posted on Jun 01, 2010

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