oil pump

I have a 96 lesabre with a 3800 and im gettting low oil pressure after 15-20 minutes or the car running, ive already replaced the sending unit and the rod bearings any ideas? should i just replace the main bearing and the oil pump? thanks for the help

Hi Everybody, I need some information on the oil pump on my 1997 park avenue. Oil light remains on after doing the reset test but after looking at the engine info I found that it tells me that oil pressure is at 0psi. I then took off the oil cap and found the upper end bone dry. Oil change was...

Hey everyone, i'm working on my Buick Park Avenue 1991 and preparing to do a refurbishment of the oil pump system, i have a serviceman working on the issue with me but we're not quite sure how to get into it, so i'd like to ask you guys for any advice you could give me. Ideally if there's some...