GM Full Size Vans 1987-1997 Repair Guide

Component Replacement

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REMOVAL & INSTALLATION



Ignition Coil
  1. Disconnect the negative battery cable.
  2.  
  3. Disengage the wiring connectors from the side of the coil.
  4.  
  5. Disconnect the coil wire.
  6.  
  7. Unfasten the nuts holding the coil bracket and coil to the engine bracket or manifold.
  8.  
  9. Drill and punch out the two rivets holding the coil to the bracket, then remove the bracket and the coil.
  10.  

A replacement coil kit comes with two screws to attach the coil to the bracket.

To install:
  1. Connect the coil to the bracket with two screws.
  2.  
  3. Connect the coil and bracket to the engine bracket or manifold with studs and nuts.
  4.  
  5. Tighten the coil hold-down nuts to 20 ft. lbs. (27 Nm).
  6.  
  7. Engage the coil wire, then the wiring connectors at the side of the coil.
  8.  
  9. Connect the negative battery cable.
  10.  

HVS Cap
  1. Disconnect the negative battery cable.
  2.  
  3. Remove the retainer and spark plug wires from the cap. If there is no wire retainer, be sure to tag all of the spark plug wires before disconnecting them from the cap. This will ease cap installation and ensure the correct firing order.
  4.  
  5. Loosen the two retaining screws holding the cap to the HVS assembly and remove the cap.
  6.  

To install:
  1. Install the cap to the HVS assembly and secure the two retaining screws.
  2.  
  3. Install the spark plug wires and wire retainer to the cap. If no retainer was used, be sure to connect the wires as tagged during removal.
  4.  
  5. Connect the negative battery cable.
  6.  

Rotor
  1. Disconnect the negative battery cable.
  2.  
  3. Remove the cap from the HVS housing assembly.
  4.  
  5. Remove the rotor attaching screws and note the position of the rotor (also note from which holes the screws were removed), then remove the rotor.
  6.  

To install:
  1. Install the rotor in the position noted earlier, then secure the rotor using the attaching screws.
  2.  
  3. Install the cap to the HVS housing assembly.
  4.  
  5. Connect the negative battery cable.
  6.  

 
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