Where is the PCV Valve and Temperature Switch?

I have a 1992 Pontiac Transport, it has the 3.8 in it, and it says that it has a PCV Valve, but I have been unable to locate it anywhere, where would it be if it did have one? I would also like to know where I can find the Temperature Switch? I know on my 2004 Pontiac Grand Am it was on the back side of the engine.
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