You will need to bleed your GM clutch master cylinder anytime the clutch is not working as effectively as it should or if the fluid in the top fluid reservoir appears dark or dirty. It is important that you bleed the master cylinder without introducing air into the system. It's a surprisingly simple process, but you may have to repeat it a few times to get the job done right.
Open the hood of your car and locate the clutch master cylinder, which is mounted on the firewall of your car, near the position of your clutch pedal on the driver's side. It will have a plastic fluid reservoir on top.
Remove the cap from the clutch master cylinder fluid reservoir by pressing down and turning it counterclockwise until the small tangs sticking out of the cap line up with the gaps in the rim of the reservoir.
Using a turkey baster, remove some but not all of the clutch fluid in the reservoir. Leave enough to cover the feed hole to the clutch line, which you will be able to see easily by looking down into the reservoir. Empty the fluid you have removed into a clean jar.
Add new clutch fluid up to the fill line in the reservoir. Replace the cap.
Pump the clutch four or five times to send the clutch fluid through the system. Remove the reservoir cap and look at the fluid. If it is still very dark or cloudy or has particles floating in it, repeat these steps until the fluid is clear. Bring your jar of used clutch fluid to your local mechanic to dispose of properly.
