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charging issues

  1. Need help Changed alternators but now service charging system

    Cadillac DTS Forum 2006 through 2011
    after an alternator swap it now reads 13.5-13.6v which IT used to read 14.4 before my alternator went out and to mention I have a battery light on with service charging system in the DIC not to sure what it could be maybe my battery not sure to be exact but any opinions would be helpful thanks...
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