Where to find fixed orifice PCV Valve GM P/N 12572717

[Brenden Burnham]

So I am trying to find where you can get the PCV Valve 12572717.  For those that do not know there is one of two types of PCV valves that our trucks use.  Either the spring and plunger style or the newer style fixed orifice.  Problem is the original spring valve many times causes high oil consumption.  GM came out with the Fixed style and now from what I see and have read is discontinued.  Not sure why the one that fixes the issue of higher than normal oil consumption is discontinued.  Mine is the older style you can tell in that it rattles when you shake it.  Would like to get the newer style.  

 

Here is the bulletin that came out about this issue.

 

Document ID# 901494

2001 Chevrolet Chevy K Silverado - 4WD

 

 

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Subject: Higher Than Expected Engine Oil Consumption (Replace PCV Valve) #01-06-01-029B - (07/19/2002)

 

 

 

Models: 2002 Chevrolet Avalanche

 

1999-2002 Chevrolet Silverado, Suburban, Tahoe Models

 

2002 Cadillac Escalade, Escalade EXT

 

1999-2002 GMC Denali, Sierra, Suburban, Yukon Models

 

with 4.8L, 5.3L or 6.0L Engine (VINs V, T, N, U -- RPOs LR4, LM7, LQ9, LQ4)

 

 

 

 

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This bulletin is being revised to clarify the parts information. Please discard Corporate Bulletin Number 01-06-01-029A (Section 06 -- Engine/Propulsion System).

 

 

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Condition

Some customers may comment on higher than expected engine oil consumption. They may further comment on consumption in the range of 3,200 km (2,000 mi) or less per quart (0.946 liter) of oil under normal driving conditions.

 

Cause

The condition may be due to the positive crankcase ventilation (PCV) valve flow rate under certain engine operating conditions.

 

Correction

Verify that the oil consumption is not the result of an oil leak or other engine concern.

The dealer should perform an oil consumption test. The vehicle should have accumulated over 6,450 km (4,000 mi) before establishing the oil consumption rate. Reference Corporate Bulletin Number 01-06-01-011, Information on Engine Oil Consumption Guideline, for details.

Remove the PCV valve and inspect the hose going to the intake manifold for signs of excessive oil being present.

If excessive oil is present in the PCV hose, replace the PCV valve (Type 948C) (2) with a new-style fixed orifice PCV valve, GM P/N 12572717(1). See the illustration below.

PCV Valve Identification

 

 

 

 

(1) New style fixed orifice PCV Valve

(2) Spring and plunger style PCV Valve (Type 948-C)

 

Important: The new style fixed orifice PCV valve contains no moving parts, and does not rattle when shaken.

 

If the vehicle has an orifice style PCV valve, investigate other causes for high oil consumption.

 

Parts Information

Part Number

Description

Qty

 

12572717

Valve, PCV

1

 

 

Parts are currently available from GMSPO.

 

Warranty Information

For vehicles repaired under warranty, use:

 

Labor Operation

Description

Labor Time

 

J6000

Valve, PCV - Replace

Use published labor operation time

 

 

 

 

GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.

WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION

 

 

© Copyright General Motors Corporation. All Rights Reserved.

 

 

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Document ID# 901494

Edited March 17, 2022 by Brenden Burnham

[Brenden Burnham]

Further research shows that 1999-2002 used the old bad style.  Fixed style in 2003 vehicles and 2004-later was part of the valve cover so not replaceable.  I am going to go to the auto parts store and compare a year 2000 with a 2003 and see if the 2003 is fixed.  That may be a way to get one.

[newdude]

1999-2002 valve covers were superseded to the no PCV valve valve covers.  They tell you to put the PCV hose to the fixed port on the cover.  AKA, PCV valves were eliminated on LS engines.  That's probably why they discontinued the new style replacement valve, that and the fact that these trucks are now 20-23 years old.

 

All of the aftermarket ones, and even the AC Delco Professional one are all first design PCV valves.  

 

2000 CHEVROLET SILVERADO 1500 5.3L V8 Positive Crankcase Ventilation (PCV) Valve | RockAuto

 

 

Edited March 17, 2022 by newdude

[Brenden Burnham]

3 minutes ago, newdude said:

All of the aftermarket ones, and even the AC Delco Professional one are all first design PCV valves.

Which is what I noticed and trying to avoid.  Was really just trying to get a fixed one to swap mine with.  But now it seems would have to get a new updated valve cover.  Right?

[Brenden Burnham]

10 minutes ago, newdude said:

1999-2002 valve covers were superseded to the no PCV valve valve covers.  They tell you to put the PCV hose to the fixed port on the cover.  AKA, PCV valves were eliminated on LS engines.  That's probably why they discontinued the new style replacement valve, that and the fact that these trucks are now 20-23 years old.

 

All of the aftermarket ones, and even the AC Delco Professional one are all first design PCV valves.  

 

2000 CHEVROLET SILVERADO 1500 5.3L V8 Positive Crankcase Ventilation (PCV) Valve | RockAuto

So I basically need the GM GENUINE 12570427 which shows that it is the left valve cover.  This the correct one?

https://www.rockauto.com/en/catalog/gmc,2000,sierra+1500,4.8l+v8,1359132,engine,valve+cover,5772

 

[Brenden Burnham]

@newdude I see exactly what you mean.  Going to pick up one of the newer style valve cover.  Thanks alot.  

[shakenfake]

Yes new style valve cover is the way to go. If you are still having issues you could also try the LS6 valley cover

[Brenden Burnham]

11 minutes ago, shakenfake said:

Yes new style valve cover is the way to go. If you are still having issues you could also try the LS6 valley cover

Can you send me a link or do you have a item number for the LS6 valve cover?  That may be the way to go if it is even better design.  Really just want to do this once.

Edited March 17, 2022 by Brenden Burnham

[Brenden Burnham]

13 minutes ago, shakenfake said:

Yes new style valve cover is the way to go. If you are still having issues you could also try the LS6 valley cover

Not really having issues just high oil consumption and hoping this is issue and not the poorly designed pistons being the issue.  It does idle good just goes through oil like its a drug.

[richard wysong]

thats a good possibility, Also if the pcv system clogs either in the hose or vacuum system or the passages in the valve cover the system tends to backflow causing high oil consumption by the oil getting drawn through the crankcase vent into the air intake

[shakenfake]

16 hours ago, Brenden Burnham said:

Can you send me a link or do you have a item number for the LS6 valve cover?  That may be the way to go if it is even better design.  Really just want to do this once.

No not valve cover, valley cover, it is the thing that goes underneath your intake manifold where your knock sensors screw into.

 

I would do the valve cover first and then try the valley cover afterwards but here is a link: https://www.texas-speed.com/p-5146-gm-ls6-valley-cover-includes-gasket-bolts.aspx

[Brenden Burnham]

1 hour ago, shakenfake said:

No not valve cover, valley cover, it is the thing that goes underneath your intake manifold where your knock sensors screw into.

 

I would do the valve cover first and then try the valley cover afterwards but here is a link: https://www.texas-speed.com/p-5146-gm-ls6-valley-cover-includes-gasket-bolts.aspx

I see what part your talking about.  Is the original valley cover design also sometimes at fault for oil consumption?  I had just heard of the PCV Valve or the Piston fault.  The piston issue is the bottom ring ends up getting jammed up and the oil scavenging doesn't do good once it gets stuck.  

[redvett]

Did this on my 2001 Silverado and Corvette worked great. Found it here.

https://www.ebay.com/itm/125182232515?chn=ps&_trkparms=ispr%3D1&amdata=enc%3A1wcaGUg3eRZqIxtn07chPiQ66&norover=1&mkevt=1&mkrid=711-117182-37290-0&mkcid=2&itemid=125182232515&targetid=1599090334937&device=c&mktype=&googleloc=9030162&poi=&campaignid=15275224983&mkgroupid=131097072938&rlsatarget=pla-1599090334937&abcId=9300697&merchantid=6296724&gclid=Cj0KCQjw29CRBhCUARIsAOboZbI2SCjmhHIgiTnvGsiz8pvFoPHeMWWKIoqtb8qZGxr1VjRiLefgfoQaAvilEALw_wcB

[Brenden Burnham]

1 hour ago, redvett said:

Did this on my 2001 Silverado and Corvette worked great. Found it here.

https://www.ebay.com/itm/125182232515?chn=ps&_trkparms=ispr%3D1&amdata=enc%3A1wcaGUg3eRZqIxtn07chPiQ66&norover=1&mkevt=1&mkrid=711-117182-37290-0&mkcid=2&itemid=125182232515&targetid=1599090334937&device=c&mktype=&googleloc=9030162&poi=&campaignid=15275224983&mkgroupid=131097072938&rlsatarget=pla-1599090334937&abcId=9300697&merchantid=6296724&gclid=Cj0KCQjw29CRBhCUARIsAOboZbI2SCjmhHIgiTnvGsiz8pvFoPHeMWWKIoqtb8qZGxr1VjRiLefgfoQaAvilEALw_wcB

Exactly what I was looking for.  Thanks so much.  Just got it.  

[Brenden Burnham]

16 hours ago, richard wysong said:

thats a good possibility, Also if the pcv system clogs either in the hose or vacuum system or the passages in the valve cover the system tends to backflow causing high oil consumption by the oil getting drawn through the crankcase vent into the air intake

Exactly right.  I took it out and noticed there was some oil and buildup in the pcv valve.  So pretty clogged.  I did clean it out.  I did notice the valve cover did have the newer design but still used pcv valve.  I just got a fixed orifice pcv valve so waiting for that to show up.