Water pump to block oring info

[Dozerboy]

Well I have to replace the water pump and I have a Mahle gasket kit #HS5458A from when I did the HGs on my truck. I’ve been told the O-rings are not inside this kit for the water pump, but there are 2 large orings that I can’t see what else they would be for.
They are about 3.5” in diameter.
This is the only specs I can find on the O-ring I need which doesn’t really make sense to me. Anyone tell me forsure if I have the right ones or not?

 

[Chevy1925]

Are they black?

Also can’t think of another area where that large of an o-ring is needed.

 

[ikeG]

94013304 is OE part number for 01-16. Only other seal close to that size is cp3 adapter to block seal. Y bridge seals are smaller than 3.5".

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[Dozerboy]

Are they black?

Also can’t think of another area where that large of an o-ring is needed.

Yes they are black

 

[Dozerboy]

94013304 is OE part number for 01-16. Only other seal close to that size is cp3 adapter to block seal. Y bridge seals are smaller than 3.5".

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Ya I didnt think about the CP3.

 

[Dozerboy]

The orings in Mahles set where for the CP3 while it might have worked you had to stretch it a bit and probably wouldn’t last.