2000 Denali no start

[Skweez]

I have a 2000 Denali our battery has been out while we were waiting for a new BCM. Now truck won't start, it cranks but no start. When I stop trying to start it it sounds like it's about to back fire. I've already tested fuel pressure it was at 60, if I'm not mistaken it's supposed to be between 55-65. Also after installing the new BCM (which came programmed) I was programming my keyless entry remote and noticed that the truck isn't coming out of programming mode. I put the radio fuse back in, turned key on and off but it remains in program mode. Could this be related to the no start?