P0621.. Help please. I have installed 2 new batteries and 2 new reman alts. Still not charging and the battery light is still on. Can anyone lead me to finding the issue here? This is on a 2013 Chevy Express duramax Ambulance. Thanks

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Asked by Oct 12, 2016 at 11:29 AM about the 2013 Chevrolet Express Cargo 3500 Diesel

Question type: Maintenance & Repair

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I am also having there very same issue with one of our 2006 Chevy Express 6.6L ..

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