Question about 2002 GMC Sierra 1500

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I have a 2002 GMC Sierra and my wife has a 2005 Yukon. Odly enough they have both lost specific fan speeds (mine 1+2 and hers just 5) and some of the radio lights no longer work. I was ''lucky enough'' to be in the Sierra when they quit at the same time. all fuses appear to be fine, would the Blower Motor Resistor do this?

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The motor blower resistor would cause the loss of the different speeds but not the lights, thats a different issue the speed resistors are not hard to replace and cost's $20.00 bucks for them butthe lights should not be to hard to remove they use the mini minutre bulbs.

Posted on Nov 17, 2009

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This would either be a resistor or the switch could also be faulty. Check lines to the switch. You can test switch output with an ohmmeter to see if there is resistance in each setting of the switch. Common GM problem

You can go to autozone.com and register for free repair manual if you desire.


Posted on Nov 17, 2009

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