GM Full Size Vans 1987-1997 Repair Guide

Vacuum Modulator

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REMOVAL & INSTALLATION



THM 400
  1. Raise and support the front end on jackstands.
  2.  
  3. Disconnect the vacuum line at the modulator.
  4.  
  5. Remove the screw and retaining clamp.
  6.  
  7. Remove the modulator. Be careful! Some fluid may run out.
  8.  
  9. Installation is the reverse of removal. Don't kink the vacuum line. Replace any lost fluid.
  10.  

 
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