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help with pcv

Silverado15005.3
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newdude Senior Enthusiast

newdude

Posted
Posted (edited)
2 hours ago, fertech said:

I have a Silverado 1500 5.3L 2020 and wanted to know if anyone know where is the pcv located,

also do i need to replace the whole valve cover or just the pcv?

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PCV or Positive Crankcase Ventilation system is that, a whole "system" of plumbing, baffles and if equipped, check valves.

 

What piece or portion of the PCV system are you inquiring about?  There is a foul air hose, fresh air hose, both valve covers have PCV oil/air separator baffles (those domes between the coil packs), and then the driver's side valve cover has a built in metered orifice where the foul air hose attaches to.  

Edited by newdude
Silverado15005.3 New Member

Silverado15005.3

Posted
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Posted

PCV Valve, the reason is cause one day my truck dashboard said low oil add oil, so when i check it had no oil at all, i added oil, and a few days had no oil again.

 

i do have some code:

 

Screenshot 2024-05-30 195911.png

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GETGONE Enthusiast

GETGONE

Posted
Posted

There is no separate valve. It's built into the valve cover. Neither of those codes have anything to do with no oil. PCV is NOT going to be the issue if you lost all oil in a few days.

newdude Senior Enthusiast

newdude

Posted
Posted
1 hour ago, Silverado15005.3 said:

PCV Valve, the reason is cause one day my truck dashboard said low oil add oil, so when i check it had no oil at all, i added oil, and a few days had no oil again.

 

i do have some code:

 

 

IMG_7413.PNG

 

 

 

Those codes have nothing to do with the engine.  

 

These engines don't have a "pcv valve", just that metered orifice in the driver's cover that the PCV foul air hose attaches to.  

 

Your oil loss is either from leaks or from consumption.  Leaks most likely being oil cooler lines, consumption being carboned up stuck piston rings.  

  • 1 year later...
Brewer205 New Member

Brewer205

Posted
Posted

the reason you are loosing a lot of oil can be from yes the pcv. but thats not the big problem. the pcv gets plugged allowing too much crankcase pressure. where does it go? the path with least resistance, rear main seal. i just did mine a day or so ago and i noticed on my pcv there was alot of dirt buildup around it. which if you oil will collect any dust and will tell you if you have a leak. i had the same issue oil low sign came on, filled it. next day same thing but i smelled burnin oil. underside of truck was covered and it was coming from bellhousing. indicating rear main. hope this helps

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