Uh...do I have an oil pressure problem?

[mrbadwrench]

I've never seen it dip below 40.

 

It sits at 20 at any RPM.

 

upload image high quality

[Sierra706]

Normal

 

 

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Edit. Scratch that. Didn’t see the any part

[garagerog]

mrbadwrench,  you say you've never seen it dip below 40  and now it sits at 20 at any rpm which in my opinion is not normal, 20 psi might be normal at a hot idle but you should see the psi's pick up with rpm. I would suspect a faulty gauge or oil pressure sending unit, verify with a mechanical gauge.

[DeePa]

Over 3500 rpms the oil pressure should be around 60 psi. 

 

Cold idle should be 40, warm idle 20-30, and should raise to 40 while driving under 3500 rpms. 

 

If if you’re stuck at 20, go to the dealer ASAP. Assume it’s a problem and get it fixed. 

[Paintor]

Where's yer left front wheel?

[FL335i]

What DeePa siad is correct.

[redwngr]

This may ease your concern.

From a GM article about the new EcoTec3 engines in the 14+ trucks.

 

Instrument Cluster Oil Pressure Gauge

 

The oil pressure gauge needle oscillation is due to the two-stage oil pump self test. The ECM will perform a functionality test of the two stage oil pump after a cold soak, when the engine is first started and the vehicle is driven.

 

This functionality test will occur three times in a short time span and can be observed on the oil pressure gauge as a brief increase (spike) in the oil pressure gauge needle. Upon completion of the three tests, the self test will not occur again until after the engine is turned OFF and another cold soak has completed.

 

TIP: The exception to this self test occurs if the vehicle has come to a stop BEFORE the three tests have been completed. If that occurs, the self test will run again until the test can complete.

 

Additionally, at 3,500 RPM or greater, the two-stage oil pump switches over to high stage and the oil pressure gauge needle will move to the high position.

[20165.3Eco]

Mine has never seen below 25 PSI hot idle. Hot running at over idle is always right at 38-39 psi and will spike up to 65-75 psi when the high pressure stage kicks in above 3500 rpms. 

[thewhitestallion]

General rule of thumb for oil pressure is about 10psi per 1k RPM's. Keep in mind this is a GENERAL rule of thumb and not brand specific to our trucks.

[Bxnanaz]

My truck behaves like most above;

~25 hot idle (20 if it’s really, after towing)

-builds it’s way up to ~40 until 3500+

- 60+ after 3500+

 

if your truck does not behave this way, take it to the dealership.

[newdude]

There is some buffering between actual reading and the gauge.  Hook up a scan tool if you are worried.  Looks fine to me however. 

[truckofwinandawesome]

Has the truck given you any low oil pressure warnings at all? If there were truly an issue with Oil pressure the truck likely would have warned you if it went below a certain threshold.


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[mrbadwrench]

3 hours ago, truckofwinandawesome said:

Has the truck given you any low oil pressure warnings at all? If there were truly an issue with Oil pressure the truck likely would have warned you if it went below a certain threshold.


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No warnings. I'll take it to the dealer if I get one. The gauge returned to 40 but now it randomly hits 20 sometimes. I'm going to assume it's a faulty gauge or its supposed to do that. 

[mrbadwrench]

On 12/24/2017 at 10:32 PM, Paintor said:

Where's yer left front wheel?

I've been meaning to bolt it back on, but you know with the holidays and all...