GM Service Manual Online
For 1990-2009 cars only

Tools Required

    • J 23738-A Vacuum Pump
    • J45727 Rubber Stopper

Manual Bleeding


    Object Number: 1145269  Size: SH
  1. Attach a clear line to the bleed screw with the loose end submerged in a small container of clutch fluid.
  2. Actuate the clutch pedal 5 times at a normal speed by stroking it all the way to the pedal stop in both directions.
  3. Actuate the clutch pedal quickly 10-15 times without bringing the pedal all the way up, 30-40 mm (1.18-1.51 in) short of stop at pedal.
  4. Repeat steps 2-3 five times.
  5. Hold the pedal at up stop and open the bleed screw.
  6. Stroke the pedal to the floor normally and close the bleed screw.
  7. Lift the pedal to up stop position.
  8. Repeat steps 5-7 three times.
  9. Notice: Refer to Fastener Notice in the Preface section.

  10. Tighten the bleed screw.
  11. Tighten
    Tighten the screw to 7 N·m (62 lb in).

  12. Remove the bleed line from the bleed screw.

Vacuum Bleeding

    Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1145167  Size: SH
  1. Tighten the bleed screw.
  2. Tighten
    Tighten the screw to 7 N·m (62 lb in).

  3. Ensure the pedal is in the released position by pulling the pedal up against the stop.
  4. Fill the reservoir with DOT 3 hydraulic fluid to the MAX level (1).
  5. Important: Brake fluid will deteriorate the rubber on the J45727 . Use a clean shop towel to wipe away all fluid after each use.

  6. Install the J45727 and attach to the J 23738-A or equivalent with a length of hose.
  7. Place the J45727 over the top of the reservoir opening and hold it to ensure a seal when vacuum is applied.
  8. Operate the J 23738-A to achieve 51-68 kPa (15-20 hg) on the gage.
  9. Hold vacuum for approximately 1 minute.
  10. Slowly relieve vacuum and remove the J45727 from the reservoir.
  11. Replenish fluid to the proper level.
  12. Repeat steps 5-9 until all air is removed from the clutch system.
  13. Replace the reservoir cap.
  14. Important: The clutch pedal will go to the floor on the first actuation, but should improve on the following actuations.

  15. Actuate the clutch pedal 10-12 times to ensure proper operation.
  16. Road test the vehicle to ensure proper clutch operation and shifting.