GM Full-Size Trucks 1988-1998 Repair Information

Clutch Slave Cylinder

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REMOVAL & INSTALLATION



1988-95 Models

See Figure 1

  1. Disconnect the negative battery cable.
  2.  
  3. Raise the vehicle and support it safely.
  4.  
  5. Disconnect the hydraulic line from the slave cylinder.
  6.  
  7. Disconnect the hydraulic line from the master cylinder.
  8.  
  9. If necessary on 1988-91 R/V models, remove the nut retaining the hydraulic line and the speedometer cable to the cowl, then install the nut to hold the speedometer cable in place.
  10.  



Click image to see an enlarged view

Fig. Fig. 1: Exploded view of the slave cylinder components-1988-95 models

  1. Cover all hydraulic lines to prevent dirt and moisture from entering the system.
  2.  
  3. Remove the bolts securing the cylinder and remove it from the transmission.
  4.  
  5. Installation is the reverse of removal. Tighten the cylinder retainer to 13 ft. lbs. (18 Nm) Bleed the clutch hydraulic system.
  6.  

1996-98 Models

See Figure 2

  1. Remove the transmission.
  2.  
  3. Unfasten the bolts that attach the slave cylinder to the clutch housing shaft.
  4.  
  5. Remove the cylinder from the transmission input shaft and the bearing from the cylinder.
  6.  

To install:
  1. Install the bearing on the cylinder.
  2.  
  3. Install the cylinder on the input shaft and make sure the bleed screw and the coupling are positioned with the transmission ports. Install the cylinder bolts and tighten them to 71 inch lbs. (8 Nm).
  4.  
  5. Install the transmission.
  6.  



Click image to see an enlarged view

Fig. Fig. 2: The slave cylinder is attached to the clutch housing shaft-1996-98 models

HYDRAULIC SYSTEM BLEEDING



1988-95 Models
  1. Fill the clutch master cylinder with the proper grade and type fluid. Raise and support the vehicle safely.
  2.  
  3. Remove the slave cylinder retaining bolts. Hold the cylinder at about 45° angle with the bleeder at the highest point.
  4.  
  5. Have and assistant fully depress the clutch pedal. Open the bleeder screw. Repeat until all air is expelled from the system.
  6.  
  7. Be sure that the fluid level remains full in the clutch master cylinder throughout the bleeding procedure.
  8.  
  9. Install the slave cylinder.
  10.  

1996-98 Models
  1. Fill the clutch master cylinder with the proper grade and type fluid. Raise and support the vehicle safely.
  2.  
  3. Have an assistant, fully depress the clutch pedal. Open the bleeder screw located on the side of the transmission to expel air.
  4.  
  5. Close the bleeder screw.
  6.  
  7. Repeat steps 2 and 3 until all air is expelled from the system.
  8.  
  9. Be sure that the fluid level remains full in the clutch master cylinder throughout the bleeding procedure.
  10.  
  11. If the previous procedure fails to work, perform the following steps.
    1. Remove the clutch master cylinder reservoir cap.
    2.  
    3. Pump the clutch pedal quickly for about 30 seconds.
    4.  
    5. Stop and let the air escape. Repeat as necessary.
    6.  

  12.  

 
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