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2018 Silverado Left & Right Turn Indicator Failure


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A few weeks ago my Left Rear Turn Indicator Failure light came on and my taillight got really dim. Then a few days ago my right tail light did the same thing.  The right tail light is not as dim but does the same rapid blinking and both failures come up on the dashboard.  Any suggestions of things to test out? I have not been able to find any youtube videos or forums that are very recent.  Thank you.

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