2000 Z28 Shifting Issue!
I always recommend a good bleeding, with new fluid ran through. Check the level, if its dark in color or no longer clear, do a good bleed. Be it mityvac or traditional, doesn't matter.
Then come back with more info.

Are you low on clutch fluid? Hows the color?
The pedal doesn't stick, so it doesn't sound like a hydraulic issue... kinda rules out bad master or slave, as long as you are not losing fluid. Im guessing fluid is dirty, or something in the trans. Are you using a short shifter?


