2004 GMC Sierra driver door harness/Multi wire connector to the window switch?

Tiny
SAWYERWILLIAM
  • MEMBER
  • 2004 GMC SIERRA
  • 5.3L
  • V8
  • 4WD
  • AUTOMATIC
  • 168,000 MILES
I received my truck and the driver window rolls down and wont go back up and lost all communication with the turn single on the driver mirror and lose all function of the driver door (including locks both sides/all mirror function both sides) causing my dome lights to remain on at all times I went to the scrap yard and got a new main window switch connector (don't know the real name of it but its the biggest connector on the driver side window switch) and I rewired it in matching color to color and its causing my truck not to start and then when I unplug and start the truck then plug it in it says unknown driver and I lose gauge functions
Saturday, February 28th, 2026 AT 9:20 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 55,450 POSTS
Hmm, yep that sounds like the drivers door module is no good or the wiring is not correct. The modules get beat up and water damaged, here is the location so you can swap it out which should fix the problem. This module does not need programming. Check out the images (below). Please let us know what happens.
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Sunday, March 1st, 2026 AT 11:34 AM

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