Keep an eye on your fluid level to your clutch system and make sure it's at proper level and save money for a new clutch and slave cylinder. If your lucky , your clutch will still be good and you just need just repair your Slave cylinder. Just make sure the fluid is up. If it still slips or won't disengage you probably need to replace the clutch.
Hydraulic Clutch System Bleeding
Important: Never use fluid that you have bled from a system to fill the reservoir. The fluid may be aerated or contaminated.
Fill the reservoir with new brake fluid. Use Delco Supreme® Brake Fluid (GM P/N 1052535) or equivalent.
1. Raise the vehicle.
2. Depress the clutch pedal (hold the pedal down).
3. Open the bleed screw on the concentric slave cylinder in order to expel the air.
4. Close the bleed screw then release the clutch pedal.
Important: Ensure no air is drawn into the clutch system.
Repeat steps 2, 3, and 4 until all the air is out of the clutch system.
Check and refill the reservoir as needed while bleeding.
After bleeding, pump the clutch pedal several times. If the clutch engagement is not satisfactory, repeat the bleeding procedure.
If the previous procedures are unsuccessful, perform the following steps.
1. Remove the reservoir cap.
2. Pump the clutch pedal very fast for 30 seconds.
3. Stop pumping and let the air escape.
4. Repeat this procedure as necessary.
Lower the vehicle.
Good luck and find another Mechanic and if you do need a new clutch, you can most likely get your flywheel turned to save you some money instead of buying a new one.