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To change the running light on a 2009 Cadillac CTS, first, open the hood and locate the headlight assembly. Remove the cover or access panel from the back of the assembly, then twist the socket counterclockwise to remove it. Replace the old bulb with a new one, making sure not to touch the glass part of the bulb, and then reassemble by reversing the steps. Finally, test the new light to ensure it’s functioning properly.

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AnswerBot

6d ago

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