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2005 GMC 2500hd heater motor blower resistor or whole thing?

Tiny
JGUESS22
  • MEMBER
  • 2005 GMC SIERRA
  • V8
  • 4WD
  • AUTOMATIC
  • 73,000 MILES
I have a gmc 2005 2500hd truck. It still blows hot and cold air but there has been a slight ticking noise comming from under the passenger side where the feet go. How to know if I need to replace resistor or the whole blower>
Tuesday, December 28th, 2010 AT 9:36 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,269 POSTS
If the blower motor works on all speeds, the resister is fine. As far as the ticking, that could be a vent door sticking. Usually when the motor goes bad, they make a screaching noise and then stop running. See if you can locate where the noise is coming from. Check the vent door actuators under the dash.
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Tuesday, March 8th, 2011 AT 7:36 PM

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