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My 2004 gmc yukon denali has no power to driverside door no seat heater or window or lock switch is not working. The left arrow on mirror is working.

I checked the fuses and they are good. please help

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  • GMC Master
  • 1,335 Answers

Try checking your fuses first, if all good then check power from the fuse panel to all the accessories you say are not working. Might want to also check the area under the carpet along driver side. Sometimes, the main harness gets wet and corrodes terminals that supply power to seat. May want to also check the wiring harness that runs to the door which is inside the rubber molding by the driver door hinges. Wires often break in this area.

Posted on Dec 18, 2016

  • Daniel Boyd Dec 18, 2016

    OK that sound like a good idea I will do that tomorrow. Thanks

  •  SeabeeMechanic
    SeabeeMechanic Dec 18, 2016

    No problem and keep us posted of your progress

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  • GMC Master
  • 2,525 Answers

Hello Daniel Boyd,

Poking around in modern vehicle wiring can
get QUITE EXCITING... Do try to remember that
an unguided tour could trigger EXPLODING AIR bags...
or could be generally PROBLEATIC to your
very delicate (and EXPENSIVE) semi-conductor
based circuitry...

I always recommend people start at the area of interest and develop an understanding of their device's OPERATIONAL
CHARACTERISTICS... to that end TECHNICAL SERVICE BULLETINS can be IMMENSELY VALUABLE...!!!

Follow your theory on both
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and GROUND directions...

Hope this HELPS.


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Posted on Dec 18, 2016

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