Question about 2004 GMC Envoy
In mine, the brights still work but the dims did not. We located the fuse box under the hood (it looks like you need to remove bolts but you dont, it just snaps off), found the relay (not a fuse, it's a bigger grey box, the fuses are small and numbered "10", "15", "20", etc.) and pulled it out, stuck another one in and the dims worked just fine- so we now know it's a relay issue.
You will be looking for the HDM relay #46 on the diagram.
Posted on Oct 15, 2016
This is Most Likely the DIMMER Switch, or Multifunction Switch.
Posted on Nov 14, 2009
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Posted on Jan 02, 2017
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