Sean,
This is not what you asked, but it may help.
According to the ORD 9, there are 5 gaskets on the oil pan, these are the GMC
part numbers....
YT-2071435 GASKET, OIL PAN (2 RQD)
YT-2137800 GASKET, OIL PAN COVER
YT-2194147 GASKET, OIL PAN LEFT
YT-2194146 GASKET, OIL PAN RIGHT
Perhaps your parts man can cross over from these manufacturers numbers to
something easier than he can from an ordnance number.
Good luck,
David Doyle
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