High Oil Pressure

[Badbird2000]

2012 Silverado, 5.3, 230,500 miles. So, i have owned the truck since it was a year old, all maintenance up to date. The truck always has around 50 PSI oil pressure when cold, after it reaches operating temp it is about 30 at idle, 45psi at highway speed. This morning as i was pulling into work, i glanced down and noticed it was around 70 psi. Shut it down and fired it back up, the same. Went out at lunch and drove it, it was around 75psi at start up, almost past 80 at times under acceleration. About 7,00 miles ago, i had the oil pan gasket replaced (it was leaking), and a new sending unit with bypass valve (my buddy is the service tech where i take it, always does great work). Never had anything wonky oil-pressure wise until now. 

 

Anyone else had this happen?

[CamGTP]

Probably needs another new oil pressure switch sensor.

[dna9656]

I think Cam could be right buy my money is on your gauge cluster (if the '12's have the same stepper motors the older trucks used. How about that Cam?

[Bleepster]

one of the best things I did was install a glo-shift oil pressure gauge with a donut that fits between the oil filter and the block.  give me a nice solid reading as a base line.

[Badbird2000]

Well, this morning at start up, it pegged out at 80 psi, then dropped to 0. At this point, i assumed it was the sending unit. Drove it to work and it never moved, and it didn't seize up, so i'm assuming its the sending unit. 

 

Trying to find a new Silverado RST with the 6.2 and max tow package so i can move on to real problems... like bad lifters and rod bearings....