oil pressure 2023 Sierra 3.0 diesle

[Phantom 4D]

Anyone else experience low oil pressure on the baby diesel? 

It's been running on the low side. OPM shows 50% oil life. 

It was a quart low, I added one quart. No difference in pressure. 

See attached photo. 

[redwngr]

Looks about normal for when a 3.0 is idling. 

 

I wish they would adjust the screen programming to show 0 - 60 or something instead of 0 - 120.  

 

I don't think I've ever seen my LM2 or LZO go over 1/2 way

 

 

Edited Monday at 11:07 PM by redwngr

[bobder41]

It's fine the computer keeps it at 20 psi at idol. When under high load it goes to.40 psi

 

[newdude]

Normal.  

 

Minimum oil pressure at 1000rpm (between 66 - 259°F oil temp) is 23 - 33 psi.

 

The oil pump is a 2 stage variable displacement pump as well, with a low psi and a high psi stage that is switched with an oil flow control valve.  

 

As for your quart of oil, normal driving the spec max allowed spec is 1 quart in 2000mi, if doing a lot of towing, hard driving, high speeds or high RPMs, the spec allowed max is 1 quart in 1000mi.  

 

If you have a fairly new truck with low mileage (under 3000mi) you could still be dealing with break in period consumption.  

Edited Tuesday at 03:16 AM by newdude

[Phantom 4D]

On 9/23/2024 at 7:06 PM, redwngr said:

Looks about normal for when a 3.0 is idling. 

 

I wish they would adjust the screen programming to show 0 - 60 or something instead of 0 - 120.  

 

I don't think I've ever seen my LM2 or LZO go over 1/2 way

 

 

Agree on the programing. The other issue is finding spec oil. I had to go to the dealer for oil. No one else around here had it in stock. 

[Jay P]

1 hour ago, Phantom 4D said:

Agree on the programing. The other issue is finding spec oil. I had to go to the dealer for oil. No one else around here had it in stock. 

Where do you live? I have bought Mobil 1 Dexos D oil at the Auto Zones where I live and at times the local Walmart has had it.