[ChevyGuyNC]

I've got the same solenoid, and it's wired to an unfused always-on-with-ignition blade on the fuse panel. Therefore, always engaged when running, and it kept the idle way higher, regardless of AC on or off. For now I pulled it from the fuse panel.

If it's really just to prevent run on at shut off, then I'll leave it that way. If it's supposed to be to bump the idle when AC is on, why wouldn't it be tied to the AC switch? I posed another thread about it before I saw this one...