What should oil pressure gauge read on a 2011 5.3?

[SLong]

I have a 2011 Silverado Z71, 5.3 with 70K miles. I have a question as to what oil pressure gauge reading I should be seeing on my truck. When I first started my truck this morning, it read around 50 lbs of oil pressure. Once I drove 4 miles or so and got on the interstate, I looked at it a few miles later. Over the course of a 40 mile ride on the interstate to work, it read between 32-38 lbs on the oil pressure gauge. I could get it to go up to 40 but it required getting on the throttle pretty good to simulate a passing situation. I think I seem to remember it staying at 40 lbs during interstate travel over the life of the truck so far. Is the current pressure readings something to be concerned about? I am curious if this is a sign of a lifter going out or something else to have checked out. Thanks in advance for any feedback.

[Carder09]

Seems normal, suppose to fluctuate at speeds so as long as it isn't reading 0, you should be good.

[gmtech4]

there are 2 different 5.3 engines with different specs ,,,,what is your engine code ? 8th digit plse

[SLong]

8th digit of my VIN #?

[gmtech4]

yes

[SLong]

3. Thanks.

[gmtech4]

this minimum pressure on a hot engine

 

24 psig at 1,000 engine RPM

35 psig at 2,000 engine RPM

38 psig at 3,000 engine RPM

[SLong]

Ok, thanks. I'm probably fine then. I run at 1700 rpms a on the interstate. Thanks again.

[gmtech4]

yw

[dsmmace]

My 09 in right on the minimum specs, burns a liter per 1000kms. Damn, I picked a winner of a used truck!

 

My dealer says my issues with my truck is normal and won't take the time to look into it further. I guess I'll run it until its knocking and then they can fix it.

 

 

[gmtech4]

normal my butt,,,check this.......

 

Oil Consumption Diagnosis

Oil Consumption Diagnosis

Checks

Causes

Excessive oil consumption, not due to leaks, is the use of 1 L (1 qt) or more
of engine oil within 3 200 kilometers (2,000 miles).

Preliminary

The causes of excessive oil consumption may include the following conditions:

• External oil leaks
  

  Refer to Oil Leak
  Diagnosis.

• 
  
• Incorrect oil level or improper reading of the oil level indicator
  

  With the vehicle on a level surface, run the engine for a few minutes, allow
  adequate drain down time, 2–3 minutes, and measure for the correct engine oil
  level.

• 
  
• Improper oil viscosity
  

  Refer to the vehicle owners manual and use the recommended SAE grade and
  viscosity for the prevailing temperatures.

• 
  
• Continuous high speed driving and/or severe usage
• 
  
• Crankcase ventilation system restrictions or malfunctioning components
  

  Refer to Crankcase
  Ventilation System Inspection/Diagnosis.

• 
  
• Worn valve guides and/or valve stems
• 
  
• Worn or improperly installed valve stem oil seals
  

  Refer to Spark Plug
  Inspection.

• 
  
• Piston rings broken, worn, or not seated properly
  

  Allow adequate time for the rings to seat.

  
  

  Replace worn piston rings, as necessary.

  
  

  Refer to Cylinder
  Leakage Test.

• 
  
• Piston and rings improperly installed or not fitted to the cylinder bore
  

  Refer to Lower Engine
  Noise, Regardless of Engine Speed.

[SLong]

I changed my oil 2600 miles ago on my 2011. Checked my dipstick the other day and it was a hair down from when I changed it. It took 7 ounces of oil to get me back to my mark on the dipstick. Truck has 70K miles on it. Would you guys view this is acceptable?

[gmtech4]

read my last post under "causes"

 

7 oz is a far cry from 33 oz (1 liter)

 

 

i'd say you are good

[SLong]

Thanks for the input.