I have two new (to me) numbers.
One is for the QOSIII temp sensor ("SENSOR; QOS THER")
It's the two wire sensor that screws into the front face of the cylinder head towards the intake side (somewhat hidden by all the brackets). The two wires are Black and Yellow (kind of an 'Amber' or 'Safety Yellow' shade of yellow). It is short, the threads come right up to the wrench flats and the wires come out the top 1/4" to 3/16" from the top of the wrench flats. I'll post a pic when I get one.
Isuzu P/N: 8-97032870-1
GM P/N: 97032870
Packing list P/N: 8-97032-870-1
The next I wasn't too sure about posting here, but was a large enough PITA to get a PN for I figured I would post it to hopefully save some grief.
It's the belt for the Factory AC compressor ("BELT: P/S PUMP" yeah, I know, but that's what it says, and it appears to fit

).
Isuzu P/N: 8-94452904-0
GM P/N: 94452904
Packing List P/N: 8-94452-904-0
I'm not really expecting people to keep the AC compressor, if they get one, but on the off chance they do....