I have had a strange thing happen twice now. I drive my truck daily, at least a couple hours a day. Recently, I would get into my truck in the morning, and it acted like the batteries were dead. Turn the key, and the truck would "attempt" to turn over, but wouldn't do it. The first time, I figured well the batteries are bad. Had a buddy of mine give me a jump. When the cables were connected, I didn't even give it 30 seconds before I tried to start it. It started like there was no issue. Had the batteries tested ( still connected to the truck) and they tested good. Drove the truck for a couple of weeks with zero issues. This morning, the same scenario. As soon as the cables were connected, truck started right up. This time, I noticed that the fuel gauge read empty for a few minutes, then gradually caught up.
The second issue, could be completely unrelated. Over the past month or so, I have noticed that occasionally the steering wheel controls would not operate correctly. Example, menu up button operated as the OK button, volume up button would change the mode of the radio. This is also intermittent.
Does anyone have experience with these issues?
BTW, my truck is 2017 F350 diesel, 4x4, CCLB

 

Sounds like a bad battery to me.
You said you had them tested, but they were still connected to the truck, if you didn't disconnect at least one battery, then you are getting a false test, because the batteries are interconnected, so you aren't really testing them independently.
So, they need to be individually LOAD tested, with a proper testing tool, not just voltage tested.
I would bet you come up with one bad battery.
When that occurs, you need to replace BOTH batteries.
If you only replace one, the older one will eventually drag down the new one.

 

Sounds like a bad battery. Like mentioned if they aren't disconnected from each other and properly load tested you won't know. When changing batteries you need to do both at the same time.

 

I would start with cleaning the battery terminals and cables before throwing money at the problem.

 

This☝️

When hooking up jumper cables helps this fast I’ve found it usually indicates a loose/dirty connection at the battery.

 

I removed and cleaned the terminals the first day it happened. Made sure everything was tight also.
I’m leaning towards the batteries as well. On my way home from work tomorrow, guess I’ll stop and get the batteries load tested and then go from there.