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Discussion Starter #1
I've read about the special pan gasket in the TSB on LS4 oil consumption from the AFM return port in the oil pan atomizing the return oil.

The 5.3L truck engines have a GM part that looks like Rthe Spaceballs Dark Helmet costume. Part number 12639759

It's installed over the return port in the truck oil pan to reduce the atomization of the lube oil from the AFM return system.

Wondering if this fits on the LS4 or not.
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