Question about 2005 GMC Sierra

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2005 gmc sierra blower wont turn on - 2005 GMC Sierra

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Check the fuse first thing. If the fuse it good then either the blower motor speed control switch, blower motor resistor pack, or the blower motor itself is bad. Normally the speed control switch rarely goes bad. If some of the speeds did not work prior to total failure then the resistor pack is bad. If that is not the case then apply 12 volts directly to the blower motor to see if it is good. If it runs suspect the resistor pack as the culprit.

Posted on Jul 15, 2010

  • eznaz Oct 06, 2010

    This is a common problem on these trucks, GM did not use appropriate sized wire leading to the relay. the wires and connectors melt together. you need to replace the short harness and the resistor pack. check out this link.http://www.sparkys-answers.com/2008/07/2...

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Everything was just fine then, then I had to get two new batteries,I also had to jump start it a few times, got two new batteries and now the blower is only working on the defrost vents not the vents on the dash. I'm thinking something needs to be reset all the fuese are fine.

Posted on Apr 23, 2012

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