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  1. Courtesy lamps won't turn off unless BCM-3 good fuse is pulled (2009 CTS)

    2008-2013 Cadillac CTS General Discussion
    If courtesy lamps are always on, night and day, without driving car, battery drains so engine won't start. What to do, replace BCM-3 (Body Control Module 3) or have dealer reboot the whole system?