4.8 wont start on first turn

ok so ive got a 03 silverado ever since i put the superchip on it, it wont crank first turn.
so i've replaced the fuel filter still same problem i have to turn it on let the the fuel pump run the turn it off back on let it run fires right off. also 108,000 miles drive it like a badass is it the fuel injectors , fuel pump has anybody having this problem... i mean after its on no problems it run like scalded 8! :chevy: :sigh:

Fpr

What?

If it's the Fuel Pressure Regulator, and it's like my old 4.8, its on the driver side off the fuel rail. Has a vaccum tube goin into the top of it. The part is only $5-$10. Start with the cheap fixes like this.

cool going to go get the part tomorrow let ya know if it works also that D!!! thing is like 60 bucks

Wowww. I remember mine being in the single digits. But maybe cuz its a diff year. Idk.