GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 776950  Size: SH
  1. Disconnect the clutch pedal position switch electrical connector (1).
  2. Push the clutch pedal in and squeeze the pushrod bushing tabs in, in order to release the pushrod bushing from the clutch pedal.

  3. Object Number: 776999  Size: SH
  4. If equipped with a NV 3500 or NV 4500 transmission, disconnect the clutch actuator cylinder to clutch master cylinder quick connect fitting.
  5. Remove the clutch master cylinder clip from the brake pressure module valve pipe.

  6. Object Number: 777000  Size: SH
  7. If equipped with a ZF S6-650 transmission, disconnect the clutch actuator cylinder to clutch master cylinder quick connect fitting.

  8. Object Number: 776958  Size: SH
  9. Rotate the clutch master cylinder 45 degrees clockwise to the unlocked position.

  10. Object Number: 776956  Size: SH
  11. If equipped with a NV 3500 or NV 4500 transmission, remove the clutch master cylinder.

  12. Object Number: 776996  Size: SH
  13. If equipped with a ZF S6-650 transmission, remove the clutch master cylinder.

Installation Procedure


    Object Number: 776996  Size: SH
  1. If equipped with a ZF S6-650 transmission, install the clutch master cylinder.

  2. Object Number: 776956  Size: SH
  3. If equipped with a NV 3500 or NV 4500 transmission, install the clutch master cylinder.

  4. Object Number: 776958  Size: SH
  5. Push in and rotate the clutch master cylinder 45 degrees counterclockwise to the locked position.

  6. Object Number: 777000  Size: SH
  7. If equipped with a ZF S6-650 transmission, disconnect the clutch actuator cylinder to clutch master cylinder quick connect fitting.

  8. Object Number: 776999  Size: SH
  9. If equipped with a NV 3500 or NV 4500 transmission, disconnect the clutch actuator cylinder to clutch master cylinder quick connect fitting.
  10. Install the clutch master cylinder clip to the brake pressure module valve pipe.

  11. Object Number: 776950  Size: SH
  12. Apply light pressure to the clutch pedal to couple the pushrod socket to the clutch pedal.
  13. Connect the clutch pedal position switch electrical connector (1).
  14. Pump the clutch pedal 3 time prior to starting the vehicle to ensure connection is complete.