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I just checked out my day time running light failure on my silverado and found that the body control module was not sending the feed to the DRL or day time runnig light relay located under the hood fuse box. You can check by pulling the relay and putting a jumper a cross the relay switch contacts. If the day time running lights come on you need to swap that relay with one of the same type. If it still don't work more then likely its the BCM, but check the drl fuse and the fuse that feeds the relay before replaceing the BCM.

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17y ago

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