I've seen it on 5.3's with AFM/VVT. Brand new engines btw... I can only think of one 6.2 I've seen it go lower than 20. Mine is around 25...

It's up to you whether you want to worry about it. I don't.

You also have to take into account that the gauge isn't perfect. The real test would be to get a real pressure gauge and hook it up.

 

VERY good point.

 

I thought about that. But it's easier to ask on the forum, than go dig up a mechanical gauge that is known to be working lol.

 

Mine seems lower than any of my other trucks also. Normally in the mid 20s when idling and seems to just barely get to 45-50ish during WOT.