Question about 2003 GMC Sierra

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My 2003 gmc sierra wont blow any air out of the vents

I turn on my heating unit and turn the temperature all the way up and the fan all the way up and it will not blow any air out of the vents not even with the ac on. i looked at the fuses and they are all good. i dont know what to do please help

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It could be the fan motor or the fan motor resistor
take it in to the dealership and ask a service consultant about it.

Posted on Jan 28, 2009

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Check for 12 V and ground at blower motor with the fan switch at high if o.k replace motorand if you12V but no ground replace fan switch .good luck

Posted on Jan 28, 2009

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