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headlights turn off and on

  1. 06 cts engine stumbles and headlights turn off and on

    Cadillac CTS First Generation Forum - 2003 - 2007
    Somebody has got to have a answer to this. My brother has a 06 cts with a 3.6l engine about 9 months ago he had a code that his purge valve was malfunctioning, so I replaced it for him, it lasted about one week and it happened again, so I replaced the part and installed it. Now at the same time...