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there is a number of things that could cause this. here are a few easy ones to check. is the e-brake fully disengaged. are the bulbs burnt out. is the wiring harness plugged into the daytime lights bulbs and in good condition. if these check out, you may have a fault in the daytime running light module.

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โˆ™ 2009-10-27 03:29:55
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Q: What would cause the daytime running lights on a 2003 gmc sierra to not work?
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