Hello. I have a 2007 Chevy Tahoe LT 5.3V8 flex fuel. My engine oil gage pressure normally runs 40. My gage went to 80 and stayed there for a couple hours then when I started it the next morning it stayed on 0. Engine is running fine other than that. I haven't had any recent oil change but it is due for one. Any thoughts on what could be causing it? Thank you

 

It’s very common for the oil pressure sending unit on these to fail. It’s on the back of the engine. Behind the intake manifold . We do a lot of them at the GM dealer I work at