Truck will not start

[biscuits and gravy]

Some Cummins and CAT motors have a protection solenoid that prevents starting too soon after shutting off the truck. To prevent damage by starting and shutting off quickly back to back.

If you check batteries, cable connections and etc and all is well there, check to see if your truck has one of those protector solenoid, because it may have gone bad.

There are so many things it can be but like in2trux said, start with those things first he outlined.

What town are you in? It's a long shot, but maybe somebody from the forum is near by and can help you.