Question about 2004 GMC Envoy

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Gmc Envoy 2004 Seat heaters

My 2004 gmc envoy seat heaters do not work. There is no power to the switches as neither driver or passenger lights come on when buttons are pushed. What could the problem be. I could not identify the fuse that controls this in order to check to see if it is blown.

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  • Anonymous Oct 22, 2008

    We have a similar problem. We have an 02 Envoy. My husband had the heater in the driver seat on then tried to adjust the seat when everything on the seat quick working. Not sure where to look to fix this.

  • seana9 Dec 20, 2008

    i have a similar problem with my 2004 gmc sierra. the heater on the drivers seat works fine but when try to turn on the passengers seat heater it shorts turns off the drivers seat. it seems to have some sort of short. i couldnt find the fuse to check it. can anyone help?

  • Anonymous May 03, 2009

    i have the same problen. niether of the switches have power and i noticed that seating memory is not working

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You may want to look for the fuse in the fuse panel under the back passenger seat. Also, it may not be a fuse, it may be a relay. I had the relay that controls the movement of my seay go bad and when i took it out it was extremely hot and burned my fingers. If it is a relay, I would suggest using a pair of pliers to pull the relay out. Hope this helps!

Posted on Oct 31, 2008

I have the same exact problem so i would be very thankful if any know the reason

Posted on Oct 14, 2008

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I have the same problem with my 2004 HD Sierra. I found that the "MBEC" 50 amp fuse in the under hood fuse box had blown. Replaced that and it works now. This has happened twice in 2 years.

Posted on Dec 30, 2008

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