Question about 2003 GMC Envoy

1 Answer

2003 GMC Envoy Low beam headlights will not work.

I got into my suv and started it up. I noticed that my clock was flashing 12:00 Oclock. My high beam will work, but my low beam will not. Can you help?

Posted by on

  • 9 more comments 
  • chiefs77 Mar 12, 2009

    I turn on my 2003 GMC Envoy and the Low Beam Headlights will not come on. My Hi Beam and Fog Lamps do work. My switch on the dash is alwas set on Automatic. I changed both bulbs with no joy. I also checked the fuses and they were good. I also discovered that my cruise control was inop too. My creuse control is part of the Turn/Dimmer Switch Assembly

  • Rick Hoffer Apr 04, 2009

    Chiefs77: Can you tell me what the issue was. The same exact thing happened to my 03 Envoy this weekend.


  • Dale Schofield
    Dale Schofield Nov 02, 2013

    I too have an '03 Envoy and I always use the automatic lights. While my corner clearance lights, fog lights, dome lights, dash lights, and high beams work as they are supposed to, my low beams are not working. My 10A fuses, headlights, and relays are fine. Tonight I went as far as to disassemble the headlight switch to look for hotspots on the printed circuit board and there were none. I reassembled everything with no change. I tried the suggested banging of the column, but did not see any changes. Any other ideas or places/ways to check?

  • Dale Schofield
    Dale Schofield Nov 02, 2013

    I have an '03 GMC Envoy that the low beam headlights stopped working. I always use the switch in the auto position. I have checked both 10A fuses, the relay, and the bulbs. The dome, corner clearance, highbeams, dash lights and domelight continue to be unaffected by this problem. I have tried the suggested banging of the column, but saw no effect. I even went so far as to disassemble the light switch to see if I could find any hot spots on the printed circuitry, but found nothing. I reassembled everything with some bulb grease on the connections, but no change. Any suggested next place to look or thing to try?

  • dennisse reyes
    dennisse reyes Nov 11, 2013

    I had the same problem,(high beams worked, but low beams didn't) I did all the "easy" stuff first but nothing. I ended up taking it to the dealer and it was the headlamp module! I have lights!!!

  • Anonymous Mar 16, 2014

    both lights

  • Anonymous Mar 21, 2014

    low beam headlights will not work at all

  • Anonymous Mar 21, 2014

    halo headlights low beams dont work but everything else does

  • Anonymous Mar 21, 2014

    halo headlights and everything works but the low beam

  • Anonymous Mar 24, 2014

    Low beam lights both went out suddenly leaving high beams working fine.

  • Anonymous Mar 30, 2014

    blower motor works on high then only works on low also when vechile is turned off blower still runs



1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that gotĀ 5 achievements.


    An expert whose answer gotĀ voted for 20 times.


    An expert who has written 20 answers of more than 400 characters.

  • Expert
  • 50 Answers

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!

Posted on Feb 02, 2009

  • dennisse reyes
    dennisse reyes Nov 11, 2013

    I had the same problem,(high beams worked, but low beams didn't) I did all the "easy" stuff first but nothing. I ended up taking it to the dealer and it was the headlamp module! I have lights!!!



1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

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

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

GMC Envoy 2003 SLT only the parking lights and fog lights work. The low beam and high beam don't work. Please help

Well, the problem is that I dont know the reason, you should investigate. There could be issues with lamps (must get new) or electricity problems (must head to auto-service)

Jun 29, 2012 | 2003 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

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

2 Answers

Headlights, regular and high beam, are not adjusted properly. Also the high beam sends light straight up in front of the SUV ?

The adjustment screws/nuts should be located either on the top of the headlamp assembly, behind the headlamp assembly, or near the frame rail by the radiator support.

You will have vertical adjustment screws for each independent beam (separate highs and separate lows, but will be same screw if highs and lows are the same bulb). You may also have additional horizontal adjustment screws as well

Park your car on a level ground 30 feet from a wall and measure the height from the ground to the bulb and mark on a wall (do this for highs beams and low beams if the bulbs are separate, if highs and lows are the same bulb, only do it for the lows)

For Low Beams: If the headlights read VOR, then aim the brightest part or cutoff part just below the mark on the wall. If it says VOL or nothing, aim them 2 inches below the mark on the wall.

For High Beams (if separate from low beams): Aim the headlight directly at the line you marked on the wall.

Sep 25, 2009 | 2003 GMC Envoy

1 Answer

2003 Envoy low beam headlights won't work

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

Sep 09, 2009 | 2003 GMC Envoy

Not finding what you are looking for?
2003 GMC Envoy Logo

2,904 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts


Level 3 Expert

76846 Answers


Level 3 Expert

1311 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22246 Answers

Are you a GMC Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides