"16 Ram 6.7 returned towing from Florida. Unhooked, Parked in the garage and a few days later I was going to go for an oil change and it won't start. All it does is click. I have power and the batteri...
Presuming not original batteries? If OE batteries they are likely toast. 1 of them anyway. Maybe even replacements could be done for, just not as likely. How did you “check” them? If one is bad and the other still good you’ll get a “good” reading, if you didn’t isolate them.