it was running fine than it lost all power i was lucky going 5mph than i parked and shut her off than when i tried to start it agian it wont start and the wait to start light wont even come on any ideas
First thing to do is check for codes. You can do the key trick (off, on, off, on, off, on leave on and codes will show in the odometer) but it is better to use a scanner. If you don't have a scanner or know anyone that does you can rent one from O'Reilly's and many other parts stores.
Napa filters are ok to get you by but they are not the best choice for your truck. Do some research on both fuel and oil filters because some of them are not approved for use on cummins. I would recommend Fleetguard or Baldwin for fuel filter and Fleetguard stratapore or Donaldson ELF for oil. I use Baldwin and from my local Peterbuilt store they are quite a bit cheaper than getting one from an auto parts store.