Century, Grand Prix, Impala, Intrigue, Lumina, Monte Carlo, Regal 2001-2005

Ignition Coil Pack

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Removal & Installation



All of the vehicles covered 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 installation. Numbered tags of masking tape or other identification will save time at installation. Spark plug wires MUST be returned to their original and proper locations. Unplug the spark plug wires from the ignition coils.
  4.  
  5. Remove the 2 screws securing the each ignition coil to the ignition control module and remove the ignition coil(s).

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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

  6.  

To install:

  1. Position the ignition coil(s) to the ignition control module.
  2.  
  3. Install the 2 retaining screws for each coil, then tighten to 40 inch lbs. (5 Nm).
  4.  
  5. Attach the spark plugs wires as noted during removal.
  6.  
  7. Connect the negative battery cable.
  8.  

Testing



  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.  

 
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