If this hose is leaking or is wet , it's time to replace your 1989-1990 Corvette's worn and damaged hoses!
Time, wear and extended competitive driving in your C4 Corvette with a manual transmission will eventually wear out the Corvette Clutch Slave Cylinder hoses, causing shifting problems. Replace your worn C4 Corvette Clutch Slave Cylinder, Clutch Master Cylinder or Hoses to get the clutch response you deserve.
Check around clutch line area for fluid leaks, it could be a bad hose, and it will need to be replaced to restore performance.