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Buick Forum: 2006 Buick Lucerne CXS RKE not working after alternator failed
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  1. #1
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    2006 Buick Lucerne CXS RKE not working after alternator failed

    Have a 2006 Lucerne CXS with the 4.6. Had the alternator fail while driving, which created an internal dead-short inside the alternator. After replacing the alternator I found that the keyless entry/remote start/truck release no longer work with the key fobs, and I am unable to re-program any key fobs, if I go through the DIC to "PRESS TO RELEARN REMOTE KEY" it just flashes a blank screen for a second and then display "PRESS TO RELEARN REMOTE KEY" again. I have tried pulling every fuse I can think of, but nothing seems to work. I have talked with my uncle at a GM dealer and he said the techs don't have any idea what it could be without looking at it. At this point I am assuming it is the BCM? Which would need to be programmed at the dealer? Any one else have any ideas what it could be?

  2. #2
    polarzak is offline Full Member My Buick(s): Ex-Lucerne Owner, Now loving my Chrysler 300.
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    Re: 2006 Buick Lucerne CXS RKE not working after alternator failed

    People here might not have any idea without looking at it also. LOL. Could be a BCM problem. Try disconnecting the battery, for at least a half hour (couple of hours to be sure) to discharge the capacitors, and reset the BCM to factors default. I seem to recall my 06 had an issue with the door locks once and this little trick corrected the problem. May work for you too...may not.

  3. #3
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    Re: 2006 Buick Lucerne CXS RKE not working after alternator failed

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    It's been a while, but I think I had trouble reprogramming my key remotes too, the first time I tried it. I never did get the remote start to work. That DIC isn't so intuitive as you might think. Check out the instructions in the owner's manual. https://my.gm.com/content/dam/gmowne...rne_owners.pdf

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