Question about 1999 GMC Yukon

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Fan does not work in 96 gmc sierra

I have replaced the blower motor and the blower motor resister and blower motor relay i dont know what to do

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  • 47 Answers

It shuld work on high temperature only

Posted on Nov 25, 2013

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Posted on Jan 02, 2017

ministock48
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SOURCE: 1996 GMC blower motor only works on high speed.

more than likely yes the resistor

Posted on Oct 22, 2009

  • 432 Answers

SOURCE: need to know where the heater blower motor

Unless they moved it and are still using the same part,I would say that this one is located behind the glove box sandwitched between the underside of the dash and the top of the airbox.The blower motor is mounted to the underside of the airbox.

Posted on Jan 04, 2010

  • 518 Answers

SOURCE: 1996 GMC Sierra Heater blower motor only works on

The blower motor resistor is located within a foot of the blower motor in the duct that the blower motor blows into. The resistor is actually cooled off by the blower motor blowing across it. It has a wire harness that connects it to motor & fan switch. It is held in place by 2-4 retaining screws. Disconnect wire harness,unscrew retaining screws then lift out. Reverse order to install.

Posted on Jan 24, 2011

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1 Answer

1995 GMC Sierra fan blower not working.


In the beginning you should check for voltage and ground.
The 50amp fuse marked AC powers the blower motor and the motor is grounded.
The high speed relay bypasses the resistor. So you should have power coming from the fuse and thru the high relay. Then the resistor for the other speeds gets power from the heat and ac control module which also controls the blend doors.
You may need a shop manual or repair book to get the diagrams.

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the first thing i would check is the relay for the blower motor. if the relay is operating properly the blower motor or the resister may have failed. on your vehicle the blower motor and the resister are a single assembly. its behind the glove box, fairly easy to replace.

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2005 gmc sierra heater fan quit working. I lost the fifth speed months ago and a couple of days ago lost the other four, the first day the fan would come on sometimes while driving then quit after a while...


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Per your description, I believe you may have a blower fan relay that is stuck closed.
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Let me know.
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