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Buick LaCrosse Electrical/Lighting Problems

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Comments

  • Was your problem with the lights finally rectified? Thanks for your post.
  • I have this same problem on my 2006 CXS. The low beams just go out for no reason. brights work fine. I drive with the fog lights on all the time at night so that if the lights decide to go out I still have some lights without having to use the brights. The lights seem to always come back on after a few minutes. I have started to turn the lights off and let car idle for a few minutes prior to leaving the house, then turn the lights on manually and drive with the fog lights on. Its worked for the last few times I drove at night, but I may be fooling myself. I am going to purchase an Exterior Lighting Relay and replace it.
  • Yes, our problem with the lights has not happened again since replacing the Exterior Lighting Relay. It has been nine or ten months since replacing the part. This is about a $25 part. Sorry, I didn't see your message when you posted it. Hope this helps !
  • Thank you very much. I am going to pick up one today and replace.
  • Hello Mariah,

    I just called a local dealer asking for the Exterior Lighting Relay and he tells me that he could find a relay with that name. I dont know if you have access to the part # or if you even know exactly what we have been posting about, but I would appreciate it if you could locate the part # and send to me so I can get it from the dealer and try to prevent the problem from happening again.

    Thank you,
    Phil
  • gmcustsvcgmcustsvc Posts: 4,001
    philp433,
    My name is Christina; I have taken over for Mariah. What dealer are you working with? Can you please email me with your VIN and current mileage? I am working to find an answer to your question. I look forward to your email.
    Christina
    GM Customer Service
  • Hello Christina,

    Thank you for getting back to me. Here is my VIN 2g3we587461287233, mileage is 74K.
    I am not currently working with a dealer, although I have worked with Jerry's in Weatherford, TX on other issues while the car was in warranty. This issue did not come up during that period.
    Thanks again. Phil
  • I looked up my service record. The exterior lighting relay was replaced on 5/29/09.
    We have not had the problem since. Our car is a 2006 LaCrosse CX. The part number for the relay that was installed is: 15016745 . Hope this can help !
  • Thank you very much!! This is great, I will call the dealer and see how quick I can get one. I have an 06 CXS. Thanks again!!
  • gmcustsvcgmcustsvc Posts: 4,001
    philp433,
    How did things go getting your vehicle fixed? I look forward to the update on your progress.
    Christina
    GM Customer Service
  • jack0059jack0059 Posts: 2
    I am installing a after market backup caqmera. I want to hook to the backup light inside the trunk. I have found 6 wires. Black/yello stripe,Large plain black, small plain black,Green/right stripe,blue whright stripe, puple/wright stripe. Can anyone idwentify whick ones are the backup lights? I got little to no help from my dealer.
  • jack0059jack0059 Posts: 2
    2011 Buick Lacrosse
    I am installing a after market backup caqmera. I want to hook to the backup light inside the trunk. I have found 6 wires. Black/yello stripe,Large plain black, small plain black,Green/right stripe,blue whright stripe, puple/wright stripe. Can anyone idwentify whick ones are the backup lights? I got little to no help from my dealer.
  • philp433philp433 Posts: 6
    Hello Christina,
    I purchased the relay suggested by amkdevile in his post and found it was the exact relay used in my car. It is listed as fog lights in the fuse panel. At the suggestion of the dealer, I did not install it but repositioned it with another relay in the panel (A/C). So far the A/C has worked and the lights have only gone off one time for about 10 seconds. I may go purchase the relay if the lights continue to go out, thinking that the new relay may be built with some better components internally now than the originals were. However, that may be dreaming. The frustrating thing is that the car runs great, most of my driving is daytime so on the occasion the lights do go out it may have been a month since I have driven it at night for any substantial amount of time and am not expecting anything to go wrong.
  • gmcustsvcgmcustsvc Posts: 4,001
    philp433,
    Please let me know if you need anything else or if your concerns return.
    Christina
    GM Customer Service
  • alchipalchip Posts: 14
    We love our 2006 LaCrosse, but we have had this same problem for months (just happened last night.) Like the other folks said, the manual override surprisingly does not work (i.e. taking it off AUTO and moving it to the manual low-beam setting.) To me, this is quite dangerous. Thanks for the other posts - I'll try replacing the relay.
  • amkdevileamkdevile Posts: 19
    I looked up my service record. The exterior lighting relay was replaced on 5/29/09.
    We have not had the problem since. Our car is a 2006 LaCrosse CX. The part number for the relay that was installed is: 15016745 . It might be called fog lamp relay ( Day time running lights ).Day time running lights don't work when we were having the same problem. Hope this can help !
  • alchipalchip Posts: 14
    Super. Thanks so much, I'll give it a whirl!
  • jj17jj17 Posts: 1
    i have looked at some of the solutions. one was a relay under hood with a number on it of 8866/1532866. i found it, however i have at least four of these relays with that same number.

    someone else said part # was 1501675. in the fuse box under hood what number is it. 35,36, 37 etc based on diagram in owners manual, any help would be great.
  • spicoli2spicoli2 Posts: 6
    This is most likely due to a faulty HDM Module (Headlamp Driver Module). It can be located in the fuse panel on the left hand side of the engine compartment to the left of the fan belts, it will be location #35. These are common problems on 2005-2007 Buick Lacrosse model years. You can get one at the dealer for $48 or an aftermarket version at Advance Auto Parts for $35. The part number at Advance is R6100 and it cross references with GM part number 15016745. I'm sure other auto parts stores will have these as well, you will need to check with your local store for availability.

    These are simply plug and play with no technical aptitude needed. Make sure the car is off and remove the old module and replace with the new.

    FYI- if you are going to check for day time running light operation, the car must be placed in drive before those will come on.

    Hope this helps!
  • I also am having the low beam headlight problem. I tried switching the relay with the AC relay. That seemed to work for a day or two. Sometimes the lights come on during a trip but usually not, then the next time the car is started, (next morning), they work fine again. I am leaving on a trip tomorrow and would love to resolve this problem before then!
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