So I shimmed the FPRV on my LB7.
It was a pain in the *** to get to.
Found a good write up (on this site) on how to do it and went for it.

So now the truck feels totally different.
It has a bit more pep and more responsive throttle.
I’m still getting a P1093 CEL but not as easily I think.
The trucks power is much better than before tho.

Anyone have an idea of why it’s more responsive?
It more responsive down low.
Talking in town type driving.
Off the line power and rolling power at 30mph.
I’m not even talking about it being better at WOT.