Died and won't start blown fues??

I have a recently purchased 04 2500 hd with duramax, has run fine and last night started and backed up and died like key was turned off,will crank but no fire. I changed and primed filter and no help, then found a blown fues under hood, the 25a under the fpump fuse, it is not identified in the oweners manuel, thes just call it #1, I have changed it and blows as soon as I crank? Any help will be greatly appericated.Thanks

Does the fuse legend under the fuse cover say "fpump"?

Jim

the legens calls it EDU25 it is just above the Fpump breaker and unter the starter breaker