S&T Series Blazer, Bravada, Envoy, Jimmy, Rainier, Trailblazer, Xtreme

Hydraulic System


Bleeding air from the hydraulic clutch system is necessary whenever any part of the system has been disconnected or the fluid level (in the reservoir) has been allowed to fall so low, that air has been drawn into the master cylinder.

Hydraulic System Bleeding

  1. Before servicing the vehicle, refer to the Precautions section.
  3. Fill master cylinder reservoir with new brake fluid conforming to DOT 3 specifications.
    Always use new fluid from a sealed container. Never, under any circumstances, use fluid that has been bled from a system to fill the reservoir as it may be aerated, have too much moisture content and possibly be contaminated.

  5. Have an assistant fully depress and hold the clutch pedal, then open the bleeder screw.
  7. Close the bleeder screw and have your assistant release the clutch pedal.
  9. Repeat the procedure until all of the air is evacuated from the system. Check and refill master cylinder reservoir as required to prevent air from being drawn through the master cylinder.
    Never release a depressed clutch pedal with the bleeder screw open or air will be drawn into the system.

  11. If the previous steps do not result in satisfactory pedal feel, remove the reservoir cap and pump the clutch pedal very fast for 30 seconds. Stop to let the air escape, then repeat the procedure as necessary to purge all remaining air.
  13. Test the clutch for proper operation.