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The tanks are 2 piece and then permanently sealed together. Most of the used ones I see have slight cracking in some spots, small ones going perpendicular to the seam. That being said, the crack in the second-to-last pic looks pretty extreme. I guess it depends on how far deep it is. The attachment point is a little inset to the edge from what I remember, so slight cracking won’t affect operation if it’s literally just at the lip of the seam.

All of the GM / AC Delco tanks will have “Geiger USA” molded in the plastic. To the left of the fill cap. I’ve never seen the offshore clones to see what their molding looks like.
 
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here is the GM one I ordered on RockAuto in March of this year. The identification numbers in the molding are a little hard to see but you can make them out in the reflection. The box GM label is dated 2020, fyi.

GM part number 12528777
priced at $99 on RockAuto in March ‘22

(also, I posted in the other thread, but I did check and this tank has both passage holes visible from the fill neck, so you should be okay there)







 
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