Question about 2004 GMC Envoy

2 Answers

Heater blower motor stays on when ignition turned off

My fan on the heater won`t turn off when all power is turned off

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  • edwards0333 Dec 10, 2008

    changed the relay but the heater blower motor still is on with the key off.

  • edwards0333 Dec 10, 2008

    Sorry Bro,

    I`m new to this site.

    I changed the relay with your advice. I used one from anoher source.

    My feedbacj is from what your advice,\\

    Know the blower moter stays on after the key is off

    keep positive comments


  • edwards0333 Dec 10, 2008

    Need a hug

  • tstene Dec 21, 2008

    I have the same issue on my 04 silverado. Also runs with the relay removed. Any ideas would be much appreciated. Could this be a moisture issue? If the relay was bad would blower motor keep running? I swapped the ac relay next to it into the blower slot and problem remained?

  • edwards0333 Dec 29, 2008


    The way to fix this is by changing the blower motor resistor.

    I paid $138.00 at the dealership foe a new one and it solved the problem.

    Good Luck,


  • Anonymous Dec 30, 2008

    In response to Mike. Could you let me know where the blower resistor is located and can I change it myself.


  • Anonymous Jan 20, 2009

    thanks a lot guys im new to this forum, but i replaced the module/resistor on my 03 tahoe and took care of the problem of the fan staying on

  • Anonymous Mar 25, 2014

    constant run while ignition is off

  • Anonymous Mar 25, 2014

    ignition on or off the fan blower motor stays on high you can't turn it off or down



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Fan motor will not shut off

Posted on Dec 27, 2008

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  • GMC Master
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Replace the blower motor relay, it is located in the underhood fuse (driver side) box GM part #15016745

Posted on Dec 10, 2008

  • 1 more comment 
  • yadayada
    yadayada Dec 10, 2008

    U didn't say u already changed the relay, in the shop that is the 1st thing we check, don't u think THANKS FOR TRYING IS A BIT UNFAIR?

  • yadayada
    yadayada Dec 10, 2008


  • yadayada
    yadayada Dec 10, 2008

    This rating should not be inappropriate, thanks for trying? yes, have appealed it.



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