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Is this code P1639 Cheverolet only in refernce to a bad ground?

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Have the P1639 code on a 2011 Silverado. From what I've been reading this in linked to a short on the 5 volt reference line right? if so how do I replace that specific line and where should I be looking for that?

Vehicle: 2011, chevrolet silverado 5.7

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