Question about 2004 Chevrolet TrailBlazer

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BLOWER RESISTOR BAD FAN ONLY RUNS @ HIGH SPEED

WHERE DO I FIND THE BLOWER RESISTOR ON MY 2004 CHEVY TRAILBLAZER

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Chevrolet 2004 TrailBlazer

Look next to the blower. You can remove the panel under the passenger side. Go through the glove box and move it down out of the way to access the electrical connector. Then remove two bolts and the electrical connector.

Posted on Apr 21, 2009

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Posted on Jan 02, 2017

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Chevrolet trailblazer problems


the fan resistor is bad. Most fan resistors have a different size wire for each fan speed which controls the fan speeds, the small wire is low speed ETC, This site will show you how to replace fan resister--- https://www.youtube.com/watch?v=Be61A67ltP4 - When utube comes up, Please click on 7th link down on right side of page. Good-Day!

Jul 27, 2014 | 2004 Chevrolet TrailBlazer

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My lower fan speed don't work except for the high, the fan high speed stay highest


Hello sanjuis24
It sounds like you've got a bad blower motor resistor. The resistor is located under the right side of
the dash at the blower motor. A new resistor is not very expensive and it's a fairly easy DIY.
Hope this is helpful

Mar 07, 2011 | 2003 Chevrolet TrailBlazer

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Fan only works on high speeds (4-5)


The blower motor speed resistor has gone bad, you can pick one up at most Auto Parts store like Auto Zone or your local GM dealer. The resistor is located by your blower motor under the dash behind your glove box.
Auto Zone and the dealer can give you the instructions to getting the job done and best to replace the wire harness also.
Thank you for using Fixya and be safe

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2004 Colorado cooling/heating fan will only run on high speed


sounds like the blower motor resistor is bad,thats what controls the speeds. replace that and your fan should work just fine, good luck.

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1 Answer

Heater fan runs on hi all the time. even when the key is turned off.


I gave this answer to a Trailblazer owner but it fits yours too.

There is a resistor for the blower that has a relay built into it that sticks in the run position on high. The resistor is usually bad and sometimes the connector is also burned. The resistor is on the passenger side under the dash near the blower.

Oct 27, 2009 | 2004 Chevrolet Silverado 2500HD

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Blower on my 2004 Chev Colorado only works on high setting #4.


You need a resistor pack, which is likely located in the air box, near the blower motor.

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1 Answer

NEED TO REPLACE BLOWER RESISITOR. FAN ONLY WORKS ON HIGH SPEED


Under the dashboard on the passenger side you will see the blower motor. Near the blower motor inside the air duct is the resistor. It should be held in place by two screws. Hope this helps. Good luck

Apr 20, 2009 | 2004 Chevrolet TrailBlazer

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HOW DO I FIX THE AC/HEATER BLOWER FAN ON MY 2004 CHEVY TRAILBLAZER. IT ONLY WORKS ON THE HIGHEST TWO SPEEDS 4 AND 5


Your switch acts as a reastat which adjusts your speeds your switch is going bad so you only have the two speeds left on that reastat.. thanks Jerry

Apr 20, 2009 | 2004 Chevrolet TrailBlazer

1 Answer

Fan blower for heat


bad switch or resistor block for fan speed.
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