Yes 10psi on Guage seems very low, I thought mine was low when started getting readings under 30. I had thoughts mine reads lower than normal as I mis-torqued new head drivers side started leaking oil, I am unsure but possibly readings not accurate enough when air getting in.
I've had some small oil leak since I purchased from a dealership, they dicked around the 4 times I bought it back to them. Was an hour drive from my house so 4times wasn't easy task, I should have insisted on receipts each time as after 30day mark they tried say rear main seal needed changing & I would have to pay half the cost 2,500$.
I should have fought in court but I didn't insist paper receipts to get enough evidence.
I did seal myself fixed that leak, then it was side oil pan, & now it's at head gasket.
But back to pressure I would also try checking Guage in display proper functionality. Might be easier than accessing oil pressure sensor & filter again.
I did get lucky I bought my avalanche with 4inch body lift. Helps tremendously working on it. 4in is huge when trying reach tight areas. Made getting to all transmission bolts easy + I don't need to pull manifold to get to oil pressure sensor. Still had to use pads & plywood to lay on over engine so can somewhat see & work with that sensor.
I'm hoping my pressure readings stay bit higher when I correct all oil leaks, I assume it effects it some too.
Good luck