ok, it looks like i jumped the gun.
the fittings are stainless steel--i think.
however, one fitting bleeds via a 5/16" wrench and the other three require a 10mm.
strange, i wonder if the thread on the backside is SAE or if the previous owner forced a metric (male) thread into a chevrolet SAE female box.
I will say this: Owning this truck has been a learning experience (prolly like everyone else here).
Take Care,
Tom
