So I'm looking for the part number for the block in my car and was not able to find it. I did fine these though:
oil pan part number:
GM 12581549
block: DR side rear side next to freeze plugs
3800
Series
nothing else in that area.
found a tag with a bar code on it above the bar code was BFL-R the bottom was difficult to read the first 5 digits but got 10RFL B0351736
looked on the web but couldn't find anything.
Thanks,
Jeff