I have a 2017 3500 6.7 SRW, and a 2500 6.7.
Since they are essentially the same I decided to relay a problem that I recently had, and perhaps help another and maybe receive some comments from someone that has had a similar experience.
The scenario went like this; I performed an oil, and filter change, along with the 2 fuel filters. I reset the EVIC to indicate 100% fuel filter and oil filter life. I started and drove the vehicle around the block and noted no issues. I parked the truck for a week.
A week after the service I got in and tried to start my truck. As usual I put my foot on the brake and pressed the big start button. It went through it procedures of pressuring the fuel system, heating the grid, and performing systems check before activating the starter. But this time it only bumped the starter and failed to crank. I went through this a few times. I received a message to change fuel filters, which was odd because I had already performed that service and RESET both the oil and fuel filter to 100%.
I searched the problem on the internet, and the consensus was to disconnect the battery ground thereby doing a hard start/reboot on the ECM. I was shocked to learn that this is not an entirely rare event and was supposed to have been cured before 2013 which is the model of my truck.
While I suspect that is was the reboot of the ECM that cured the problem, I'm not entirely sure that it is not a battery issue either, since I charged them while I had the cables disconnected. I would like to rule out the notion of a bad batt because the RAM dash and exterior lights and all the bells and whistles along with the grid heater did function as if there was nothing wrong.