Question about 2004 GMC Envoy

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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?

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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.

Posted on Nov 24, 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

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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

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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

Is there more than one relay switch? I found one for the high beams but not one for the low beams. I changed my dimmer switch and the bulbs but nothing has helped, I have high beams just not low beams and...


The low beam relay is #46 in the underhood fuse panel. check its contact pins before replacing it. If they are corroded, try cleaning them first.

Nov 28, 2010 | 2004 GMC Envoy

2 Answers

Low beams don't work; High beams fine. Not the


the high beam switch is at fault
A new one is needed
The directional lever you pull up on to switch to high and low connects to a rod which is going to the high beam switch at the mid section of the steering coluum. It is a headache to change for your on your head replacing this part

May 24, 2010 | 2004 GMC Envoy

1 Answer

My lights on my 04 envoy won't work on low beam but will work only on high beam


Its either the switch , relay or the Bulbs(not likely on the bulbs)

Apr 27, 2010 | 2004 GMC Envoy

2 Answers

Low beams on 2002 trailblazer won't turn on?


something might be broken inside. Those things are very easy to break try playing with it

Jul 24, 2009 | 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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