09 Tahoe Oil Consumption issue solved

[lt1gmc]

Installed a catch can in my Yukon to help with the oil consumption and oil in intake. Caught 4 oz in 400-500 miles of highway driving. Installed the update valve cover and now in 750 miles have NO oil in the catch can and no oil consumed. Thanks for the info on the valve cover!!

 

[Bowtiebug]

Great news , glad to hear others having good results as well

 

[jz57]

Read a posting about oil consumption and valve cover upgrading, here is the link:

http://www.silveradosierra.com/vortec-5-3l-v8/another-lost-oil-question-fix-t368481.html

The issue is the both valve covers for 2007-2008 and 2009-2011 are interchangeable, even GM claims that those covers are for specific years. The PCV orifice is different for each. The correct cover must be used or an SES light may set.

The only difference between those 2 covers, GM # 12570427 and GM # 12642655, is PCV orifice tubing fitting diameter.

But there is a big price difference, GM # 12570427 is double price of GM # 12642655.

If yon can make valvle cover GM # 12642655 connecting to you 2007-2008 Chevy truck PCV tubing, you could save around $50.


GM P/N 12570427 for 2007 - 2008
GM P/N 12642655 for 2009 - 2011

 

[14SWTahoe]

What are the odds my 2014 was built with an old style?

I have AFM deleted and a catch can, drove 200 miles and surprised at how much oil was back in the can, about a teaspoon!

 

[Bowtiebug]

Odds are probably 0%

 

[14SWTahoe]

I have zero idea why else oil is blowing into my pcv system.

 

[pwtr02ss]

This fixed my truck as well. I deleted DOD first, that did nothing. Valve cover was the problem.

 

[ulakovic22]

Great info, sounds like I'll be making a purchase soon.

 

[ritzz]

Local dealer wanted $150 for it (12570427), GM Parts direct has it listed for $89.88, I'll be ordering soon.

 

[JML07denali]

Anybody know the part# for 07 6.2L Yukon Denali?? Would it be part# 12570427 ??


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[farhanm]

auto work newbie here, when we do the replacement for the valve cover, we need to replace the valve cover gasket aswell? have an 09 yukon xl slt. i got the valve cover part number from the thread. do i need to order any other parts?

 

[farhanm]

Looks like someone already had the answer in the thread. Feel like a dumbass.

Ordering the valve cover now.


Thanks
--
Farhan

 

[farhanm]

OK i was trying to replace the valve cover and also install the catch can today... got the coil packs out, unscrewed the old valve cover bolts.

but now i am facing a wierd issue. The old valve cover is stuck on there pretty firm. I cant seem to get it moving to get it out. I have tried tapping it with a rubber mallet and but no luck.

was wondering if there is anything i can do to losen that valve cover, some fluid spray type thing?


Thanks
--
Farhan

 

[ritzz]

OK i was trying to replace the valve cover and also install the catch can today... got the coil packs out, unscrewed the old valve cover bolts.

but now i am facing a wierd issue. The old valve cover is stuck on there pretty firm. I cant seem to get it moving to get it out. I have tried tapping it with a rubber mallet and but no luck.

was wondering if there is anything i can do to losen that valve cover, some fluid spray type thing?


Thanks
--
Farhan

Have you tried a putty knife or flat tip and mallet to separate? New valve cover comes with new gasket so thrashing old one wouldn't hurt.

 

[farhanm]

yeh i was able to get it off by using a mallet and a flat head screw driver to pry it loose.

put the new one in. seems to be good.

 

[lamerem]

Would the GM powertrain warranty cover this replacement? Afterall it would be considered a failure of an internally lubricated part! If there is an updated cover to replace one with a known issue I would think they would cover that, no?

 

[JML07denali]

Anybody know the part# for 07 6.2L Yukon Denali?? Would it be part# 12570427 ??

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Anybody?


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[Rexter]

thanks good info

 

[yerpderp]

Can I get a link to your original post to see if our issues are one in the same? Also...can someone explain a range module? I hate my 4-8...but love my 'hoe.