Question about GMC Envoy

1 Answer

2008 Envoy Denali....I was driving down the freeway when I hear this "clicking" sound like a relay switch. My low beams go out but I still have high beams and fog lights. When I reach my destination I realize I have no interior lights unless I turn them on with the dimmer switch on the dash. The headlights flash with the security warning so I know the bulbs are good. Any thoughts???

Posted by on

  • vitotanasi Oct 03, 2009

    If the fuses are blown is it obvios??

  • vitotanasi Oct 07, 2009

    Odly enough the headlights are working fine now....the very next morning they were totally functional again...that's scary could be a wiring problem maybe??

×

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • GMC Master
  • 19,396 Answers

If you have multiple problem and there is clicking noise , then the problem is the Headlamp Driver Module relay.
To start ensure that fuses are OK, check fuses #3, #6, and #57 that control the lights.
The Headlamp Driver Module is relay #46. For testing purpose you cna try switching the relay #46, with the fan relay #47. The lights driver relay must be replaced with a relay of the same kind. Do not keep engine on without fan relay.

Posted on Oct 03, 2009

  • Ginko
    Ginko Oct 03, 2009

    If the fuses are blown replace them, then you will also need relay 46, that is the HDM relay that controls lights. It is available at any car part shop.
    The faulty relay can cause fuses to blow again.
    Buy some extra fuse along with the relay.

  • Ginko
    Ginko Oct 03, 2009

    What you do is this: first replace fuses or test them. If they do not fix the problem, then get a new HDM relay, replace it , then eventually replace the fuses again, unless there is an additional wiring problem, they should not blow with the new relay.

×

1 Suggested Answer

6ya6ya
  • 2 Answers

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

Hi,
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.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

2007 denali low beams not working


Check the light switch, fuse, relay and the wiring to the bulbs. Don't forget the ground wires either.

Jun 04, 2014 | 2007 GMC Envoy Denali

1 Answer

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

Low beams don't work


Are you getting power in and out of the dimmer switch for both high and low circuits ?

Jan 23, 2013 | 1998 Isuzu Rodeo

1 Answer

2007 gmc envoy low beam headlights not working


Try swapping relays #45 & 46 in the underhood fuse box. #46 is for the low beams.

Nov 09, 2011 | 2007 GMC Envoy Denali

1 Answer

Low beams on 2008 Envoy, they just went out and its no working just the high beams


Try swapping relays #45 & 46 in the underhood fusebox. Relay #46 is for the low beams.

Nov 06, 2011 | 2008 GMC Envoy

1 Answer

2003 envoy low beams will not work.fuses good,bulbs good,replcd turn signal assembly,not fixed.no relay in fuse box for low beams.only high beam relay.


For the I6 engine there is a relay for low beams, it's relay # 46. Switch it with relay #45 (runs the fan, same model relay) and see if your lights now come on. These 2 relays are the only 2 black ones in there (part # 15016745). Also, try to clean the contacts very well on the fuse box and the relay. If not, you may have some frayed wiring in the harness.

By the way, the high beam relay is #43, the gray one next to the windshield wiper relay #42.frontfuses.jpg

Feb 20, 2011 | 2003 GMC Envoy

1 Answer

I have a 2005 envoy denali and the head lights go off while we are driving it and the high beams and fog lights still work. Eventually they come back on. This has happened several times . Can you help me...


In the fuse box, switch relay #46 with relay #45. If you have lights again, get a new relay. Being your lights aren't out all the time, try cleaning the relay contacts, and the fuse box contacts for this relay. This worked for me.

Nov 22, 2010 | 2005 GMC Envoy Denali

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

Headlights went out. Replaced bulbs and switch and still lights don't work. Fog lights and high beams work? What else can work?


If high beams work and low beams do not, then it is probably the high/low relay. It is part number 15016745 and has four prongs. To test if your relay has gone bad locate the relay in your fuse box. There will be two of these relays located next to each other. One controls the low beam headlights and the other the cooling fan. Swap the relays and check your low beam headlights. If the low beams work you have a bad relay.

Sep 20, 2010 | 2006 GMC Envoy

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

88 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts

yadayada
yadayada

Level 3 Expert

75066 Answers

Freddy

Level 3 Expert

1311 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22095 Answers

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

Answer questions

Manuals & User Guides

Loading...