Question about Chevrolet C3500

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The daytime running lights on my 3500 do not come on. The previous owner spent $200 at the dealer to find out they didn't have any idea why the daytime running lights don't work. These trucks have been around for a long time and still GM has no clue. What a mess. - cas104p

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  • jaybyrdn91 May 11, 2010

    Start your vehicle and shine a flashlight on the DRL Sensor on top of your dashboard. If the lights don't come on it could be the sensor, or something in the wiring. You will have to leave the light there for five minutes or so. Hopefully this will help you.

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Posted on Jan 02, 2017

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SOURCE: Adding daytime running lights to a 2008 Toyota Sienna

http://www.siennaclub.org/forum/index.php?showtopic=3772

DRL's can be added simply by adding a 20 amp fuse into an empty slot in the fuse box.

Posted on Sep 03, 2008

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SOURCE: Daytime running lights not working

On the inside of the car next to the light switch there is your dome button. GM made it to where you could turn off the daytime running lights by pushing it three times in and out. Turn the vehicle on then do this. Your daytime running lights should work after this.

DeViouS Tuning

Posted on Dec 14, 2008

  • 1 Answer

SOURCE: daytime running lights are not working on my 2005 equinox

Just had same problem. After ruling out easy checks like parking brake switch, and park shift selector switch, It was a burned out resistor that is located inside the front left fender. Take off the front tire, remove the inner fender liner, the ceramic resistor is towards the front. It crumbled when I removed it, Could only get replacement from dealer for about $65.

Posted on Jan 30, 2009

shadtremonky
  • 353 Answers

SOURCE: The daytime running lights and the low beam

check all grounds

Posted on Jun 20, 2009

  • 5 Answers

SOURCE: 1997 gmc 3500 box truck. no brake lights. changed

Check the fuse.

Posted on Sep 18, 2009

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How much does it cost to repair a HDM module on a 2007 Buick lacrosse


  • Subject of a RECALL so free
  • http://www.dealerrater.ca/recalls/Buick/LACROSSE/
  • 2007 Buick LaCrosse Recall Item Affected: EXTERIOR LIGHTING: HEADLIGHTS Date Announced: 08-14-2015 Description of Recall: General Motors LLC (GM) is recalling certain model year 2007 Pontiac Grand Prix, 2006-2009 Buick LaCrosse, 2006-2007 Buick Rainier, Chevrolet Trailblazer, GMC Envoy, 2006 Chevrolet Trailblazer EXT, GMC Envoy XL, 2006-2008 Isuzu Ascender, and Saab 9-7x vehicles. In the affected vehicles, the headlamp driver module (HDM) may overheat and fail, causing the headlamps and daytime running lights to not illuminate. Action Need To Fix It: GM will notify owners, and dealers will replace the HDM, free of charge. Interim notices were mailed to owners on September 2, 2015. Dealers will install a new HDM Service part as an interim repair. Owners will receive a second notice when remedy parts are available. Owners may contact Buick customer service at 1-800-521-7300 or Pontiac customer service at 1-800-762-2737. GM's number for this recall is 14291. FIND YOUR LOCAL Buick Service Centre
  • Buick Lacrosse Fires Caused by Faulty HDM Module? ' R.J ... https://rjhillconsulting.wordpress.com/2014/07/23/buick-lacrosse... 2014-07-23 · On 7/2/15 my 2009 Buick LaCross fuse box caught fire, I have since then learned that it began in the HDM module. There is a Technical Service Bulletin for ...
  • What is a Buick hdm module - Answers.com www.answers.com > ... > Pontiac > Pontiac Grand Prix > Grand Prix SE It is the headlight drive module. It is used for daytime running lights and low beam operation. It works in conjunction with the light sensor on top.

  • Buick Lacrosse Fires Caused by Faulty HDM Module? ' R.J ... https://rjhillconsulting.wordpress.com/2014/07/23/buick-lacrosse... 2014-07-23 · On 7/2/15 my 2009 Buick LaCross fuse box caught fire, I have since then learned that it began in the HDM module. There is a Technical Service Bulletin for ...
  • What is a Buick hdm module - Answers.com www.answers.com > ... > Pontiac > Pontiac Grand Prix > Grand Prix SE It is the headlight drive module. It is used for daytime running lights and low beam operation. It works in conjunction with the light sensor on top.
  • Buick LaCrosse Recalls DealerRater

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    All of my running lights and blinkers work and high beams but no low beams on my 1997 Chevrolet TahoeA


    Headlamps Inoperative - Low Beams

    Step

    Action

    Value(s)

    Yes

    No

    DEFINITION: This diagnostic procedure should only be used if the high beam headlamps are operating properly and the low beams are inoperative.

    1

    Did you perform the Headlights System Check?
    --
    Go to Step 2
    Go to Headlight System Check

    2

    1. Turn the headlamp and panel dimmer switch to the ON position.
    2. Move the headlamp dimmer switch to the LOW position.
    3. Backprobe the headlamp dimmer switch connector with a J 35616-200 from cavity A to ground.

    Does the test lamp light?
    --
    Go to Step 3
    Go to Step 5

    3

    1. Remove the daytime running lamp relay.
    2. Connect a J 35616-200 at cavity G5 to ground.

    Does the test lamp light?
    --
    Go to Step 4
    Go to Step 6

    4

    1. Re-install the daytime running lamp relay.
    2. Backprobe cavity B at the high/low beam headlamp with the headlamp dimmer switch in the LOW position.

    Does the test lamp light?
    --
    Go to Step 7
    Go to Step 8

    5

    Replace the headlamp dimmer switch.

    Is the repair complete?
    --
    Go to Headlight System Check
    --

    6

    Repair the open in CKT 359 (PPL) between the headlamp dimmer switch and the daytime running lamp relay.

    Is the repair complete?
    --
    Go to Headlight System Check
    --

    7

    Replace the high/low beam headlamps.

    Is the repair complete?
    --
    Go to Headlight System Check
    --

    8

    1. Inspect for an open in CKT 12 (TAN) between the daytime running lamp relay and S120, repair as necessary.
    2. Replace the daytime running lamp relay if no open was found in CKT 12 (TAN) between the daytime running lamp relay and S120.

    Is the repair complete?
    --
    Go to Headlight System Check
    --

    Jul 24, 2015 | Chevrolet Cars & Trucks

    1 Answer

    I have a 93 jeep laredo, the daytime running lights are staying on even when the vehicle is turned off. The dimmer switch for the high beams doesn't work anymore. I am thinking if I replace the dimmer...


    93 Jeep Loredos didn't have daytime running lights from the factory. It has to be an after market set up so I would trace wires to power and ground. It probably has a connection to the headlight switch wires through some sort of solenoid.

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