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Gmc c4500 heater blower not working from panel

Checked fuse, replaced resistor

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: blower motor resistor replacement

the relays are behind the glove box. you have to take the glove box out to have access to the relay for the heating system 

Posted on Dec 10, 2008

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  • 1 Answer

SOURCE: heater fan not working

my car is Isuzu rodeo, this morning found the blower of heater not turning no heater work.

Posted on Dec 13, 2008

  • 1 Answer

SOURCE: 2003 GMC Sierra heater Blower wont shut off

My 2003 Sierra's blower came on by itself in the garage while I was sleeping and ran the battery completely down. I had to replace the blower switch located under the glove box next to the blower at the bottom of the right corner of the dash. The switch is in front of the blower and held in by two screws. Disconnect the two wire connections. This is a "dealer only" part and cost me 65.00. Also check the wire harness with seven wires connected to it for melted plastic. It will be marked "ABCDEFG". If it has melted, you'll need to replace it. Pay attention when reinstalling either part, that the wires "ABCDEFG" match the switch in that order.

Posted on Jan 17, 2009

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SOURCE: heater blower motor only works on high

You most likely need to replace the ignition switch. Sounds weird, but check out other posts. It works.

Posted on Aug 27, 2009

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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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2 Answers

My heater blower motor stopped working


Check the A/C ,check signal to fan and ground of the resistance.(resistors )

Jan 28, 2014 | 2000 GMC New Sierra 1500

1 Answer

Heater won't blow


Check your blower motor resistor connection.Turn switch and fan on then wiggle the resistor pigtail fan should turn on if not replace resistor.These get to hot and usally melt the pigtail and loose their connection.

Jan 13, 2012 | 1998 GMC Savana

1 Answer

1992 gmc pickup keeps blowing heater fuses I replaced the blow motor and it keeps blowing


Have you replaced the blower resistor . some times they can cause the fuse to blow . You may need a muiltmeter to test the current draw on the blower motor circuit. the draw should be less then half of the rated fuse .( 20 amp fues draw is less then 10 amps) You did not say but does the blower work on high only or the lower speeds with out blowing the fuse ? if it does work on low or high with out blowing the fuse i would replace the blower resistor

Mar 06, 2011 | GMC Sierra 1500 Cars & Trucks

1 Answer

The heater / ac in my 2006 GMC Sierra 2500HD has gone out several times. It has always been corrected by replacing the resistor. Replacing the resistor did not work this time. I have checked the fuses...


You have replaced the resistor and the blowwer is good and the fuses are good then i would say its in the switch or power to the switch, maybe at the ignition switch there a bad wire . sometimes the power wire going from ignition switch heats up and causes a bad connection, if you pull connector off the switch make sure the connector to ignition switch is not melted or burnt and also check blower control for the same, i would say that your blower is bad and drawing to much current if you have replaced a few resistors, i think maybe theres a fuse under the hood in the fuse /relay box that may be out or the connection at the switch or ignition is melted. hope this helps.

Jan 22, 2011 | 2006 GMC Sierra 2500HD 2WD

1 Answer

Heater moter or fan controls not working


After checking the fuses Check the voltage at the blower motor, if you have voltage at the blower motor, replace it, if not, check voltage at the resistor. If you have voltage at the resistor but not the motor replace the resistor. If you do NOT have voltage at the resistor check the switch itself and replace as neccesary. While checking the items make sure all connections are clean, and are corrosion free.

Jan 21, 2011 | 2003 GMC Yukon

1 Answer

My fan for the Ac and heater will not work. iam trying to replace the blower resister


the blower resistor is in the plenum... above the heater core.
If the blower motor does not work at all ... you may have a bad climate control switch.... or blown fuse even... as the resistor is a two stage coil... Low speed and medium speed... no resistor on High and would normally not go at the same time....

Sep 30, 2010 | 2004 GMC Envoy

1 Answer

Heater blower in 1998 gmc sierra 3500 isn't working . replaced the blower motor but still no blower. any other suggestions


did you check the fuses and did the motor come with a new heater resistor or is it separate

Apr 25, 2010 | 2005 GMC Sierra

1 Answer

Heater fan on 2002 Yukon does not operate in front, only rear.


The front blower motor is controlled by the blower resistor module.This is usually the problem with the front blower not working.I looked up the schecmatics and I don`t see separate fuses for the front and rear.But the fuse for the front blower is in the under hood fuse block.If this is good then The problem is probably the resistor module.It is next to the blower motor.The connector from the resistor connects to the blower motor.If you want to confirm this you can check for power and ground at the blower motor connector when you activating the blower switch on.This can be done with a test light.Make sure you have power going into the resistor module also.If you have power going in and no power at the blower motor then replace the resistor.Hope this helps.Good luck.

Dec 28, 2009 | 2002 GMC Sierra C/K1500

2 Answers

The heater fan stopped working I am suspecting a fuse or the motor. When you turn the fan on nothing happens.


The resistor module,and the plug connector, and known problems in 1999-2006 blower motors for many GM trucks.

Did you also change the connector at the same time?

Here is a step-by-step check you can do to fix it. If you are only getting high speed (setting 5), then most likely you have a resistor problem, or the wiring connector to the resistor is bad. The ground wire prong being bad is a possible cause.

Check this for step-by-step checks:

http://www.sparkys-answers.com/2008/07/2005-chevrolet-silverado-blower-inop.html

Sep 18, 2009 | 2004 GMC Sierra

2 Answers

Heater blower not working at all


resistor is mounted to the to the heater case under the hood on passenger side
rank & vote ty

Dec 15, 2008 | 2000 GMC Jimmy

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