Question about 2003 GMC Envoy

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2003 Envoy low beam headlights won't work

I have the same problem.... woke up, turned on the vehicle and the running/headlights did not work. i turned the switch to 'headlights' and only the parking lights worked. clicked the hi-beams and they work. any solutions would be helpful

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Both low beam head lights are burnt out? blown fuse.

Posted on Sep 09, 2009

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How to adjust headlights on 2003 envoy. both high & low beam are too low


You should take it to a shop that has the proper aiming equipment. You risk getting a ticket if you misalign the headlights yourself.

Jul 31, 2014 | 2003 GMC Envoy

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My night time headlights won't turn on. All the other lights including High Beams work.


Have you checked to see if the bulbs are burnt out or if the low beam fuses are Blown?

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I have a 2003 Envoy and the entry lights will not shut off and the drivers door panel will not work. The headlights quit working and now the interior buzzer has stopped working.


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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

2 Answers

2003 GMC Envoy low beam head lights will not come on. The bulbs are not blown, fuse's ok, no power coming to the head light connector. minimal power to the fuse compartment with fuse removed. 9 to 10...


The problem is a Headlight module. Fuse box under the hood has two black modules side by side, the one on your right is the headlight module the one on the left is the fan module. Try swapping them, if the headlights work replace bad module, don't drive vehicle with the bad module in the fan slot. Mine kept going bad because I had a high intensity bulb on one side.

Oct 02, 2011 | 2003 GMC Envoy

1 Answer

Both low bean headlights do not turn on high beams


Replace Relay #46 in the underhood fuse panel.

Aug 25, 2010 | 2003 GMC Envoy

1 Answer

No headlights on both sides no low beams but the high beams work replced low beams lamps check all fuses and relays but have no lights


How did you check the relays? The most common reason for low beams to be out is Relay #46 in the underhood fuse panel.

Jul 05, 2010 | 2003 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

1 Answer

2003 GMC Envoy Low beam headlights will not work.


I would start by checking the headlight relay and headlight fuse.  You also may wanna check to make sure the bulbs aren't blown out.  If those parts check out to be fine and in working order, you may need to replace the turn signal assembly in the steering column.  This part controls the hi/low beams.  This may sound crazy but, when GM wired their older trucks, they wired the headlights to go from the battery, to the hi/low beam switch, then to the headlight switch (to the left of the steering wheel) then out to the light bulbs.  You can kind of test to see if this part is good by making a fist and (with your headlights on) gently hitting the plastic cover for your steering column that is right behind your actual steering wheel.  This could cause your headlights to flicker on and off.  It's not 100% guarenteed that this method will work, but it may.  
Any questions, just ask!

Feb 02, 2009 | 2003 GMC Envoy

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