no, he means what he said.
For whatever ends the factory clutch hydraulics on the 284 equipped cars has a odd accumulator between the master and slave cylinder still to this date not sure WHY as they function fine without it. I assume it was so GM could get the clutch feel to their liking. In my experience once air gets into it its damn near impossible to get it out.
And you need a special tool to release that quick connect between the master and slave. I have one, don't ask me what its called or where I even got it cause I don't know.
That said. pull the inspection cover over the transmission where the slave cylinder attaches and observe operation. But It could be a bad master, or slave I suppose. stick your head under the dashboard and observe the boot where the master cyl rod comes in and see if its leaking around the boot.