Question about 2005 Chevrolet Trailblazer Ext

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Fan blower for heat

I have a 2005 trailblazer the fan blower for the heater doesn't work right an sometimes when you shut it off the blower kicks on cxan any one help me?

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Bad switch or resistor block for fan speed.
sometimes the resistors or coils open or bend,in which case the fan would come on on high

Posted on May 13, 2009

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I am assuming that you only have manual heat.?? if so you will need to replace blower resistor located by the blower motor.

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Sounds like your water pump is going out or your thermostat is stuck. Check the thermostat first and make sure it is not frozen in the clsed position.

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