Question about 2007 Buick LaCrosse CXL Sedan

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2007 Buick Lacrosse low beam headlights both went out at once. Doesn't appear to be the bulb. Also checked the fuses under the hood and those both appear OK too.

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  • Abby Normal
    Abby Normal May 04, 2017

    from; https://www.nhtsa.gov/vehicle/2007/BUICK...

    August 14, 2015 NHTSA CAMPAIGN NUMBER: 15V519000
    Headlamps may Fail
    Headlamps that do not illuminate reduce the driver's ability to see the roadway and reduce the vehicle's visibility to oncoming vehicles, both of which increase the risk of a vehicle crash.

    NHTSA Campaign Number: 15V519000

    Manufacturer General Motors LLC

    Components EXTERIOR LIGHTING

    Potential Number of Units Affected 429,170

    Summary

    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.

    Remedy

    GM will notify owners, and dealers will replace the HDM, free of charge. The recall began on May 17, 2016. 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.

    Notes

    Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.safercar.gov.

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The relay under the hood may have gone out. We had the same problem on our 2007 Buick LaCrosse CX. The bulbs were fine, high beams worked, all turn signals and everything except the low beams turned on. Turns out the relay had gone bad.

Posted on Sep 07, 2010

  • 3 more comments 
  • mochadown Jul 12, 2011

    Which delay was replaced?

  • martinjessic Aug 11, 2011

    Yes! I would like to know, too, as I am having the same problem with my vehicle.

  • pennyworth32
    pennyworth32 Jul 13, 2012

    I'm having the same problem :( Please which relay????

  • robertbell88
    robertbell88 Jan 17, 2013

    I have the same problem. Was it the Headlamp Driver Module Relay?

  • matcat309 Oct 15, 2014

    It's actually called a "Dim Light Sender". You can get it at a parts store.

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HDM Headlight Delay Module, real common problem, $40.00 at autozone. Original part # 15016745 Autozone #20601. in under the hood.

Posted on Nov 01, 2014

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Headlamp problems have caused a GM recall for these vehicles.

Posted on Oct 29, 2016

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2 Answers

My low beam lights are out on my 2006 Buick Lacrosse High beams are ok. already replaced relay 35 HDM with no help


Check the fuse box under the hood, a lot of cars have fuses for the head lights. Should be marked on the cover of fuse box.

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Is there a relay for the low beam headlight on a 2007 Buick LaCrosse . And where is it located?


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Low beam headlight - passenger side - on my 2006 Buick Lacrosse does not work. I've tried a new bulb - no help. The fuse - underhood fuse box - for the low beam is good. There is no voltage to that fuse...


From Info I have looked at I believe under hood micro switch relay 35 is for low beam and 34 is for high beam. It also looks like you have a different fuse for each light. The relay are for both low beam or both high beams. each headlight has its own fuse. I believe #4 fuse under hood is for passenger side low beam. fuses 1-4 under hood are for the four headlights as I understand the info I have seen.

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Shannon, you did not state if you checked for voltage at the fuse location-or better yet at the bulb location-
If a connection at the relay that feeds power to the low beams has come loose, then the low beams will stay out. Suggest that you locate the headlight relay (in a box under the hood) and verify that it is operating. If an assistant can operate the headlights while you listen (and feel) for relay operation, then you can eliminate that as an issue. Next would be the output of the relay (contacts could be bad) - and if you cannot open the relay to verify good contacts, then purchase a replacement relay (possibly from a junkyard) and plug that in.

Remember, the relay supplies the power to the headlights.
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there is a relay in the fuse panel located under the hood its called the HDM RELAY # 34 .

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There maybe a headlight relay under the hood, most are in a protective box. There may be a fuse also under the hood. Ck the fuse if there is one and tap the relays with you low beams set to be on. Good Luck, Ned

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