03 Buick oil psi check valve??

[Cox89XJ]

I’ve got a 03 Buick LeSabre and on the way home this morning I scanned through the gauge actual readings. The oil pressure gauge was reading 110 psi. It been just over one thousand miles since I changed the oil. So I replaced the filter before trying anything else. Well here I am asking for help. It wasn’t the oil filter. I know of a check valve in the oil pressure discharge that suppose to regulate the final oil pressure that lubes everything. Where is it at and how do I go about changing it? Thanks for Yall’s help.

 

[Cox89XJ]

Well well well, the problem was in the sending unit. Problem fixed.