GM Celebrity/Century/Ciera/6000 1982-1996 Repair Guide

Vacuum Servo Unit

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REMOVAL & INSTALLATION



See Figure 1

  1. Unplug the electrical connector and vacuum hoses at the servo.
  2.  
  3. Disconnect the actuating chain, cable or rod from the servo.
  4.  
  5. Remove the screws securing the vacuum servo and solenoid unit to the bracket and remove the unit.
  6.  



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Fig. Fig. 1: Cruise control servo unit components

To install:
  1. Connect the large diameter brake release vacuum line to the servo unit. Connect the vacuum hose from the vacuum control valve to the servo unit.
  2.  
  3. Connect the actuating chain, rod or cable to the servo.
  4.  
  5. Install the servo unit to the bracket, then tighten the screws to 12 inch lbs. (1 Nm).
  6.  
  7. Engage the electrical connector to the servo.
  8.  
  9. Adjust the cable, rod or chain.
  10.  

LINKAGE ADJUSTMENT



Do not stretch cables or chains to make pins fit or holes align. This will prevent the engine from returning to idle.

Cable Type

See Figure 2

  1. Check that the cable is properly installed and that the throttle is closed to the idle position.
  2.  
  3. Pull the servo end of the cable toward the linkage bracket of the servo. Place the servo connector in one of the 6 holes in the bracket which allows the least amount of slack and does not move the throttle linkage.
  4.  



Click image to see an enlarged view

Fig. Fig. 2: Cable type servo unit

  1. Install the retainer clip. Check that the throttle linkage is still in the idle position.
  2.  </