Question about 2005 Chevrolet Colorado

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Heater fan switch only works on 4. nothing on 1-2 or 3

I have a 2005 Chevy Colorado and when you turn on heater it works , but fan blower only works on 4. will not work on 1 -2 or 3. what could problem be?

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  • Anonymous Feb 25, 2009

    same as yours sometimes it works fine but other times it dont have cared it to delership several times but it always works fine for them

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Most likely the blower motor resistor has failed. GM offers an updated version.

Posted on Jan 17, 2009

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I had the exact problem with my 2005 and i took it to my mechanic and he replaced the pigtail that goes to the blower because it had wires that were burned up on the pigtail. It works great now

Posted on Feb 14, 2009

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I just had the same problem. The heat resistor was gone, It cost 16.95 and was installed in about 2 seconds!

Posted on Feb 20, 2009

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I had the same problme on my 2005 blower. I found a faulty connection in the wiring harness behind the glove box. Cleaned and rebent the pins to make better connection and it has worked fine ever since. I also had the same faulty connections on the front driving lamps. Had to clean and rebend pens to make proper connection.

Posted on Feb 20, 2009

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My 06 did that. Brought it into the dealership and they said some wires melted, i had to pay a little of $200 to get them to replace the parts.

Posted on Feb 11, 2009

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1 Answer

05 chevy colorado blower motor only works on high


Check the blower motor resistor in the front of the passenger side floorboard

Dec 15, 2013 | 2005 Chevrolet Colorado

1 Answer

The heater fan in my 2005 colorado sounds like a kids bicycle with a card in the spokes. How do i remove the fan to remove or clear whatever is making the noise?


Remove the blower motor mounting screws.
  • Remove the blower motor cooling tube (2).
  • Disconnect the blower motor electrical connector (4).
  • Remove the blower motor (3).


  • mrtechwrench_7.gif

    Nov 21, 2010 | 2005 Chevrolet Colorado

    1 Answer

    2004 chevy colorado, heater used to only work on 4, so I replaced the resister and the harness than it worked til I went over a bump...got another harness and resister now...I have nothing, what else can...


    I think there was a recal for this problem. I would go to the dealer and check and see if your vehicles has had all the recals taken care of. I have a 2004 since it was new and I took it in for a brake light recal and I believe a blower motor issue.

    Hope this helps.

    Nov 18, 2010 | 2004 Chevrolet Colorado

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    I have a chevy colorado truck and the air is cold when it works and it would only work if it was turned up on 4 1-3 didnt work and now it want come on in 4 what could my problem be


    I have a 2004 Colorado since it was new. There was a recal for the blower motor problem. I think it was for a defective connector to the blower resistor assembly. There is also a recall for a bad brake light switch. I would take your truck to the dealer and get this recall work done.

    Jun 28, 2010 | 2004 Chevrolet Colorado

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    I have a chevy colorado. only the high spped fan works. there are no indicated fuses for the fan system what can the problem be


    TRY THE BLOWER MOTOR RESISTOR FIRST. POWER GOES THROUGH THE BLOWER THEN TO THE RESISTOR AND THEN THE CONTROL MODULE TO GROUND.

    THE RESISTOR IS ON THE BOTTOM OF THE HEATER CASE ON THE PASSENGER SIDE. USING A TEST LIGHT ATTACHED TO GROUND TOUCH EACH OF THE TERMINALS ONE AT A TIME WHILE SWITCHING THE POSITIONS ON THE BLOWER CONTROL. IF THAT WORKS YOU WILL HAVE A LIGHT FOR EACH WIRE IN EACH POSITION ON THE DIAL. THE RESISTOR IS THE PROBLEM THEN.


    RESISTOR WIRE COLORS
    LOW = YELLOW
    2 = TAN
    3 = LIGHT BLUE
    HIGH = ORANGE

    RATE ME, PLEASE

    Jul 04, 2009 | 2007 Chevrolet Colorado (Extended Cab) New...

    1 Answer

    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.

    Jun 29, 2009 | 2004 Chevrolet TrailBlazer

    1 Answer

    Blower only works on 4,123 not working.


    Hi There;
    You say your heater fan only works on high.

    This issue can be repaired by replacing what is called the "blower motor resistor". The electrical current flows through this unit in all positions except #4.
    If you look under the dash on the passenger side with the heater fan on #4 you will hear the blower motor running. Just slightly toward the drivers side of the blower motor & closer to the firewall you will see a four wire connector. this is attached to the "blower motor resistor". If you get a replacement one & examine it you will see two screw holes where you will need to remove the 9/32nds screws from the one in your truck to remove the fauly one & install your new on. This part is relitivly inexpensive & it is not worth trying to locate a used one.
    Please let me know if you need more info on this
    Farrout!

    Mar 17, 2009 | 2005 Chevrolet Colorado

    2 Answers

    Fan for heater not working


    did you put power to the fan to see if it is good? did you check the fuse ?did you look at the blower resister?

    Dec 06, 2008 | 2005 Chevrolet Colorado

    3 Answers

    A-c switch on my 2005 colorado only works on high speed


    I had the same problem on my 2005 Colorado. I changed the blower resistor but still had the same problem. I had no voltage at the blower except on high. After talking with the local Chevy dealer, I found the plug-in connector that goes to the resistor had a burnt place on one of the terminals. AC offers a kit that you can splice into your existing wiring. Took me around 30 minutes to change. Costs around $50. So be sure to check the plug before changing anything out.

    Sep 05, 2008 | 2005 Chevrolet Colorado

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