18silv5.3

Hey guys, I’m having an issue with my 2018 5.3 where sometimes it will randomly hiccup and for a second lose all power(like half a second). I did a data log with hptuners and noticed around that same power drop my low side fuel pressure dropped to 23psi. Will these trucks drop that low with the new fpcm controlled fuel system? My old trucks stayed 48psi ish and up at all times. Or do I have a failing low side pump? I’ve noticed that sometimes as it builds pressure before starting it sounds like it’s grinding gravel in the tank. But drives perfect otherwise.