It ended up being what Elvira mentioned - about charging completely before installing. I hadn't done that. I've usually installed batteries right off the shelf and had not yet incurred this problem.
But I gave the batteries a good charge and haven't found any parasitic draws. So simple fix...
This has probably been asked and addressed, but I can't seem to find anything.
I've had a 2016 3/4 ton for almost a year. No electrical issues at all. But I went on a trip and the batteries were deader than dead. It was in the garage the entire time, doors were locked, no problems at all. I...
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