IIRC, you had the option of the 5.9 ISB or 6.9 ISC for that year.. for the ISC, it should be two. I'm not sure if they used two filters or a single one for the ISB, though.
Only one fuel filter
One from the factory.
On a Dodge Ram 1989-2012 have one, 2013 has two.
Lift pump on a 2007 dodge 2500
There is a screen in the tank, and a cartridge filter on the side of the block.
Depends on which engine you have. Cummins engines typically have two. Cats can have one or two.
Every 15,000 miles is what the factory recommends.
Because the pressure in the fuel system is able to escape somewhere. Make sure you fuel filters are on tight, make sure you don't have any fuel leaks, make sure your breathers on your fuel tank are functioning, make sure your fuel cap(s) not compromised.
On the fuel filter!
There are two fuel filters.
They are permanent filters that are only replaced when the fuel pump is replaced.
The question is WHICH Cummins engine? Either there'll be a hand pump on the left hand side of the engine, which you'll have to unscrew and pump manually, or it'll do it electronically... if you put on dry fuel filters, you might have to turn the ignition switch on, let it prime for a couple minutes, and repeat that process a couple times.