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My fuel pressure guage is dead and I'd feel more comfortable putting the schrader valve back in rather than leave it like this, but I don't have the one that should be there, always had a guage on it. Does anyone know if that valve is a dealer item, or can I get one from a Napa or Autozone?
I'm pretty sure it's a 1/8 NPT fitting w/ a #4an cap.
Sounds about right I know the outside threads are #4AN. The original cap I believe had an O ring in it also. I will go look at mine for you.
I also have a gauge mounted on the rail but I carry the valve & cap with me, The cap has a full black rubber insert mounted in the top of it, the valve also had a black rubber seal I would think GM used fuel grade for these parts,
hope this helps.
Last edited by floridamale; Jun 29, 2009 at 02:18 PM.