Question about 2004 GMC Envoy

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I have an gmc envoy suv 2004 low lights stopped working. I think i need i fuse but i do not know which fuse to buy

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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

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This is Most Likely the DIMMER Switch, or Multifunction Switch.

Posted on Nov 14, 2009

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I have GMC envoy 2007 Denali, the low light stopped working.


Simple and very very common problem.....it's about a $30 fix. Replace the low beam relay in the fuse box. There are 2 right next to each other #43 and 46. In a pinch you CAN switch these 2 and your lows will work. The other is for the cooling, so watch temp if you do this temporary swap.

Mar 14, 2014 | 2007 GMC Envoy Denali

1 Answer

My low beam headlights won't turn on in 2004 gmc envoy


It's the headlamp relay #46. If you want to test it, swap it out with the cooling fan relay #45 and see if your headlights work. If they do you know this is the fix. Found the solution online a couple of years ago and it was spot-on. The part was $45 at autozone at the time.

Aug 12, 2012 | 2004 GMC Envoy

1 Answer

2004 envoy xuv low beams dont work switched fuses 45 and 46 still nothing any ideas


Other possibilities are; the bulbs themselves, burnt or corroded bulb sockets, or a bad headlight selector switch.

Dec 11, 2011 | 2004 GMC Envoy

1 Answer

High beam works and low beam dont , checked fuses under hood there good , tried new switch stilll no low beam , is there a relay for low beam cant find one.


Why yes there is. It's #46 under the hood. Switch relay #45 with #46, do you now have lights? Either clean the contacts by pushing it in and out of the fuse box, or buy a new relay. Cleaning the relay worked for me, but I keep a spare just in case. Very common problem with Envoys and Trailblazers.

May 28, 2011 | 2004 GMC Envoy

1 Answer

I have a 2004 GMC Envoy with 82400 miles. My service engine soon light continuously stays on. I have had it in the shop numerous times and they have run diagnostics. I have had a tune up done, 2 sensors...


You need to let us know what the fault code(s) is. Did anyone ever give this information when they were working on the vehicle? There are many reasons for the check engine light to be turned on.

Nov 06, 2010 | 2004 GMC Envoy

1 Answer

Low beams don't work


Replace Relay #46 in underhood fuse panel

May 30, 2010 | 2004 GMC Envoy

2 Answers

Loud air sound


If there is an engine code po410 you have problems with your airpump. There are bulletins out on this situation.

Oct 16, 2008 | 2004 GMC Envoy

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