Useful part numbers of hard to find items

[Robyn]

Here are the GM part numbers for some items that may be very useful.
Some parts guys can't seem to find this stuff.

The filter bypass is #25014006

Cooler bypass is #25161285

The plug for the Cooler bypass bore (goes on top and has the little hole) is #14066310
Drive this plug down until it bottoms in the bore so that the filter adapter locating tab will not bottom on the plug

The late squirt nozzles are a #12561141 (small ones)

The little oil pump drive shaft plastic connector that goes at the
pump and keeps the shaft in is a #477249

Cylinder head dowel sleaves (GM calls them dowel pins) #12558081


Rocker arm retainer buttons are a #23500076

The metric bell housing bolts for late blocks uses a #15724226 bolt that has a metric stud top

The new style crank dowel pin that goes in the flex plate end is a
#10046031
This is a roll pin type and drives into the crank.
This is a needed item when using a Scat crank, as they dont come with anything.

Oil pump drive/vacuum pump gasket
Part #14022649
The major parts houses do not service these
List price is $1 and if you get a shop discount they are 75 cents each
Ebay sellers offering them at $6 each

Missy

[Ziabeam]

New member, first post.
Flying from Floruda to Minnesota in a few weeks (August 19th) to retrieve a 1995 G30 Cutaway van. Basically a van chopped off behind the cab with a cargo box back end. Ordering parts to take on the flight, as a precaution for the ride home.
Pertaining to oil cooler lines, I would order a full blown line set and replacement cooler if any vendor knew the van specific line requirements, but they don't. Tried Leroy's, and the Blue Ribbon vendor. Both were very helpful, but needed more info than I could furnish on a van I've yet to become fully familiar with. My major concern at present is as folliws;

Leroy seems certain the 6.5l equipped vans ALL had three cooler lines, one of which went from the radiator to the cooler. I've searched everywhere and only find an upper and lower hose, with nary a hint of a third line.
Can anyone enlighten me on this please? If there is in fact a third line, what might the part number be? The Dorman upper and lower lines have been ordered (will be tossed after the trip in favor of upgraded lines). The two Dorman G30 specific lines I found were part numbers 625-109 and 625-110 (GM equivalents 12472305/12472304)...again with ZERO findings on the elusive third hose, which Leroy mentioned.