2004 Pontiac GTO Owner's Manual - Page 214

Hydraulic Clutch The clutch fluid level should be checked weekly. A fluid loss in this system could indicate a problem. If the clutch fluid requires constant filling up it could indicate a leak. Have the system inspected and repaired by your dealer. Adding fluid won't correct a leak. How to Check and Add Fluid To check the fluid level, look at the markings on the reservoir. If the fluid level is between the MIN and the MAX line, the fluid level is correct. See Engine Compartment Overview on page 5-12 for more information on location. If the fluid level is between these marks do not remove the cap, as the fluid will quickly absorb moisture. If fluid does need to be added, first turn the vehicle off. Remove the cap and add the proper fluid. Remember to replace the cap and clean up any spilled fluid. When to Check and What to Use Refer to the Maintenance Schedule to determine the proper fluid. See Owner Checks and Services on page 6-9 and Recommended Fluids and Lubricants on page 6-13. 5-24