Ram 6.7 no start

[M_R_E_]

"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 batteries check okay. I can't figure out what is wrong.

[womps]

If you boost it and it starts it’s the batteries.

[M_R_E_]

It only clicks one time. Battery connections are good . Checked batteries with volt meter. Original batteries, 48000 miles. Why would it go dead right away if it was batteries ?

[Turtle_n_Peeps]

Several questions:

So you say it won't start than you say all it does is click.
So no crank, no start? (This is important) Big difference between no start and no crank, no start.

You state the batteries checked ok? How were they checked? With a VOM or with something that can put a load on them?

Are they the original batteries?

Have the battery connections been checked?

No crank, no start, 98% of the time it's going to be batteries, connections or starter. Someone is going to have to figure out which one of the 3 is causing you problems. Let us know what you find.

[Grit_dog]

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.