Question about 2003 GMC Envoy

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2004 envoy low beams go out. what is the problem?

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Could be a couple of things, simple first, check fuses, check globes, check relay, if this fails then I suspect the fault is in the actual light switch. Good luck, hope this guides you.

Posted on Apr 29, 2010

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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

Not work my low beam lights but the market light and high lights works on 2004 Envoy


Common problem. Next time your low beams don't work, switch relay #46 with relay #45. If you now have lights, replace the relay.

Dec 01, 2010 | 2005 GMC Envoy Xl

1 Answer

I have a 2004 GMC Envoy and my low beams are switching off periodically while I'm driving but my high beams still work, why is this happening?


You may have an intermittent low beam relay. Check Relay #46 in the underhood fuse panel, pull it out of its socket and examine the pin contacts, if they are corroded clean them. If they look good, replace the relay.

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

1 Answer

2004 Envoy, low beam headlights turn off on their own.


the daytime running light module is no good.,or the relay is overheating and cutting out and comes back on when cool.get some freeze spray from an electronic supplier and spray the suspect component when it stops working.the -60f will make it appear fast..cheers

Jun 14, 2009 | 2004 GMC Envoy

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