Mystery Battery Draw While Parked UPDATE
Update 13 Jan-- ----------- Never know--somebody on here might have an idea what to look for, thanks for any help. 2003 Chev 2500HD LT (so has lots of electrical stuff that works with ignition...
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Have been dealing with similar problem on my 2012 Duramax. Every morning I get a weak start and batteries are ~12v. It doesnt matter if the truck sits one night or multiple nights it will not continue to drain. Its like it hits a cutoff voltage of around 12v and stops draining. Have replaced batteries and just last week the alternator. Problem is still there. I have not added any accessories to my truck. Its basically bone stock.
