Originally Posted by 1955firstseries
I was working on my 55.1 today and the seat was out, and I recalled this post. Hope it helps. Can't find anything on number. Good luck to all.

Thanks for sharing that pic. A little web sleuthing located this offering from Steele Rubber - Utility Plug. In the details it says it replaces original part number "4562300". A click on the vehicle application list shows a long list of various 1940-60 Buick models. Perhaps it was just a common GM item??? Unable to get into GM partswiki search this morning due to server issues, so can't do much more research through that way.

Anyhow, more fuel for the conversation - lol! thumbs_up

~ Dan
1951 Chevy 3 window 3100
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