Won’t start

[MigsGM2500]

I’ve got a 2000 k2500 and had all the fuel lines and tnk and pump replaced in December. Went to start today and it doesn’t want to start. Like it tries but nothing. I tried using starter fluid too but didn’t help

[Logan Lanfear]

Do you have spark?  Did it run before you did the repairs.  

[Colossus]

Given that it is trying to start indicates it has some spark.. I'd look at the fuel pump again and pressure regulator if it has one.. even though you have replaced it recently.  Doesn't mean that it went bad.