Question about 2001 GMC Denali

1 Answer

My 2001 Denali front headlights work when they want to. I am trying to find out is there a headlight Relay somewhere that controls the lights. I have looked/swapped out the fuse under the hood...sometimes when I start the car, the headlight don't come on. the parking lights, fog lights and hazards work perfect. I can't seem to find out the trigger to stimulate them back on. If the vehicle is on, and they come on, they stay on until I cut them off or the vehicle off...a few times, I can cut the vehicle on and no headlights, then after a while they come on. I went to the dealer and took the headlight control out to get a cost. It is about $100 after tax, but when I went back to the car and started it with that headlight control out of the vehicle the lights were on. That tell me the prob isn't the control...so I am not sure if there is another source between the fuse and that headlight control switch. Any help would be great, what I am trying to avoid is going to the elctrical repair shop for something i can fix for $40 bucks or so....

Posted by on

Ad

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
  • 15,575 Answers

There is a headlamp relay in the under hood fuse / relay box . HDLP relay ! It should be marked on the under side of the fuse box lid.

Posted on Mar 06, 2017

Ad

3 Suggested Answers

Anonymous

SOURCE:

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this 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.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Ad

kipmartin428

  • 22 Answers

SOURCE: 99 gmc denali dash light, parking lights, tail

You have a short to ground somewhere in the drl-fog lamp circuit. Check for obvious wiring connector or wiring to drl & fog lamps. check wiring for pinched or broken wires coming from sockets. If you don't find problem, you can trace wiring from lamps to main harnesses and hopefully find source of short.
hope this helps.

Posted on Mar 02, 2010

ldwaye

  • 24 Answers

SOURCE: My 2003 GMC Yukon XL Denali low beam headlights do

The problem is likely your multi purpose signal light switch. If you take the lever and move it from hi to low beam will the low beams come on? It is common for this multi purpose (real expensive ) switch to fail after a period of time! The steering wheel may have to be removed, to change it. The air bags will also need to be disabled so as not to active them while removing the switch.

Posted on Mar 19, 2011

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

I have the owners manual in front of me but nowhere does it list the relay for the right side headlight or a relay for either headlight. Fuses are good. SSP relays dont say what they are for.


Tree is not a relay for the headlights. The headlights are ground side controlled by the FEM module. The FEM module receives lighting information from the instrument cluster which is the "gateway" for the lighting info. The headlight switch as well as the high/low and turn signal information is routed through the instrument cluster and is them delivered to the FEM module or the rear lighting control module.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

Mar 01, 2015 | 2001 Ford Windstar

2 Answers

Ok I have seen tons of posts about this issue with the Pontiac Sunfire, but no clear solution. I have a 2001 Sunfire the yesterday the Day Running Lights quit working. My passenger side head light will...


First check the R/S headlight fuse in the dash fuse panel (left side), second make sure the R/S low beam headlight bulb filament isn't blown, both these scenarios will do what you are saying. The DRL's work when both low beam lights are in series, thus only 6v going to each bulb at reduced brilliance. The high beam is a totally separate circuit controlled by the multifunction switch. The DRL relay is controlled by the Body Control Module, grounded there, and it will also illuminate the service vehicle soon light. It could also be a bad ground at G204. Its on the steering column support bracket.

Apr 08, 2011 | 2001 Pontiac Sunfire

1 Answer

The parking lights on our 2001 GMC Yukon XL stay on after turning the vehicle off. This drains the battery down to prevent starting again. What is wrong?


Hi, there is a park relay in middle of the interior relay box under the dash to the left of the steering column. This is shown on page 6-61 of your owner's manual (http://www.extendedgmwarranty.com/owners-manual/gmc/2001-GMC-Yukon-Denali.pdf)
With the battery connected, pull out the relay and push it back in. If it clicks when you do this, the headlight switch is bad. If it doesn't click, the relay is bad. Try swapping the relay with another similar relay, such as the horn or A/C relay. If that solves the problem you need a relay. If not, you need a switch. Please let me know if you have any questions, and thanks for using FixYa.

jturcotte_1301.gif

Mar 24, 2011 | 2001 GMC Yukon Denali

2 Answers

Headlights do not work. Beam works, park lights and other lights work. Bulbs ok


more than likely a fuse or a relay is bad. locate the fuse for the headlights (owners manual) and check if it is bad, if the fuse is good, find the relay and give it a flick or two and try the headlights then, if they work, its time for a new relay

Mar 19, 2011 | 2006 Ford Focus

2 Answers

My low beam headlights do not work as daytime running lights or manually with the headlight knob pulled out . The high beam headlights however do work if I have the knob pulled out all the way with the...


Check out your fuse associate with the low beam headlight, secondly there is a relay fuse under fuse rely box under the hoos. Locate this box, and locate the relay fuse associated to the low beam. You can rotate the relay with another relay of the same spec to see if the low beam lights are coming on. I would believe that it is a fuse that is blown, check your owners manaual on the location of the fuse box. Usually it's located in the driver side kick panel.

Jan 30, 2011 | 2001 Buick Regal

1 Answer

99 gmc denali dash light, parking lights, tail lights, and dash light dont work. Interior lights, brake lights, blinkers, headlights work Turning on the headlight switch blows number 15 drl-fog fuse...


You have a short to ground somewhere in the drl-fog lamp circuit. Check for obvious wiring connector or wiring to drl & fog lamps. check wiring for pinched or broken wires coming from sockets. If you don't find problem, you can trace wiring from lamps to main harnesses and hopefully find source of short.
hope this helps.

Mar 02, 2010 | 1999 GMC Denali

1 Answer

2001 Dodge Durango, headlights flicker


I had a similar problem on my 2001 Caravan. Turned out to be a loose connection between the frame control module and the fuse box. I unscrewed the frame/front control module from the fuse box and bent the tabs slightly to make better contact. Then tighten down the module securley. Need star driver to loosen screws

Jan 20, 2010 | 2001 Dodge Durango

3 Answers

Our 2001 dodge gr caravan has trouble with frt


any time you see a dim headlight it is caused by a loose,or missing,or dirty ground to that light.

Jan 05, 2010 | 2001 Dodge Grand Caravan

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

Related Topics:

123 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts

Marvin
Marvin

Level 3 Expert

85223 Answers

Jonah Oneal

Level 3 Expert

14092 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22485 Answers

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

Answer questions

Manuals & User Guides

Loading...