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Error code u18dc post battery failure

MikeMikeMike
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MikeMikeMike Enthusiast

MikeMikeMike

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Hi all done a few searches and googled but can't find this error


2020 GMC sierra HD 2500 Denali Diesel.  My  battery had depleted. Recharged it and then was able to start.  I got some really odd things calibrate driver window by opening and closing. check engine light. I called onstarI mean we pay for it right they have me error code u 18 DC.   I can't find a thing.  Any ideas??

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