Get a catch can before any mods.

[Merc1973]

Is a catch can still recommended for my stock 03 with 5.3?

 

[PG01]

Yes, always

 

[93blkongreenpro]

Is a catch can still recommended for my stock 03 with 5.3?

The 6.0 and 6.2's don't really need them, but the 4.8 and 5.3's do.

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[Tonyrodz]

The 6.0 and 6.2's don't really need them, but the 4.8 and 5.3's do.

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Why is that? Granted, I didn't get a lot in my 6.0.

 

[bottomline2000]

The 6.0 and 6.2's don't really need them, but the 4.8 and 5.3's do.

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There's an upgraded valve cover that limits the oil blow by. It's got nothing to do with engine size other than the newer engines having the redesigned cover. My catch can gets a good amount blow by oil in my 6.0.

https://bobistheoilguy.com/forums/ubbthreads.php/topics/4054336/Re:_GM_LS_engine_3rd_revision_

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[13yukon]

What's the catch can that is recommended 2013 Yukon XL.
98000 miles. Has new throttle body that was replaced in warranty

 

[95escahoe]

There's an upgraded valve cover that limits the oil blow by. It's got nothing to do with engine size other than the newer engines having the redesigned cover. My catch can gets a good amount blow by oil in my 6.0.

https://bobistheoilguy.com/forums/ubbthreads.php/topics/4054336/Re:_GM_LS_engine_3rd_revision_

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After looking at this if you have a 6.0 with the PCV built into the valve cover then it's the upgraded valve cover? My 04 Escalade has the 6.0 and doesn't have a removable PCV valve it's built in as pictured


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[M3kanic]

Most of us went with catchcans.com

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[93blkongreenpro]

6300miles. Motor has 126k miles. 07 Yukon 5.3 . DOD/AFM disabled at 93k miles. Moroso Billet Catch Can.

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[donjetman]

Ordered a catch can, ball valve, and 3/8" line today.

https://www.amazon.com/Sporacingrts...244&sr=1-3-catcorr&keywords=catch+can+baffled

I'll be doing a rear main seal job soon too