GM Century/Lumina/Grand Prix/Intrigue 1997-2000

Ignition Coil

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TESTING



Except 3.5L (VIN H) Engine
  1. Remove the ignition coil(s).
  2.  
  3. Using an ohmmeter, check the resistance between the primary terminals on the underside of the coil. The resistance should be 0.50-0.90 ohms.
  4.  
  5. Check the resistance between the secondary terminals. It should be 5,000-8,000 ohms.
  6.  
  7. If the coil failed either test, replace the coil.
  8.  

REMOVAL & INSTALLATION



Except 3.5L (VIN H) Engine


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Fig. Tag and detach the connectors, unfasten the retaining bolts, then remove the coil and module assembly from the vehicle



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Fig. The ignition coils are secured to the module with retaining bolts/screws-3.4L shown



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Fig. The ignition coils are secured to the Ignition Control Module (ICM) with retaining screws



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Fig. Ignition control module/coil assembly mounting

All of the vehicles covered by this guide use V6 engines and, with the exception of the 3.5L engine, similar ignition systems. The ignition coil removal procedures are similar, differing only in the types of wiring connections.

  1. Disconnect the negative battery cable.
  2.  
  3. Note the position of the spark plug wires for installa