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Home >> Cadillac >> 2004 >> CTS Base, 3.6 7 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 6 (Engine Controls - 2.6L & 3.2L - Introduction) >> Repair Instructions >> Ignition Coil(s) Replacement - Bank 1 >> Removal Procedure

Removal Procedure

WARNING: This page is about a different variant/trim than selected.
  1. Relieve the fuel system pressure. Refer to Fuel Pressure Relief Procedure .
    2. Fig 1: View Of Chassis Hose/Pipes Retainer
    GM785815Courtesy of GENERAL MOTORS CORP.
  2. Refer to Quick Connect Fitting(s) Service (Metal Collar)  in order to disconnect the following quick connect fittings from the fuel rail.
    • The return hose/pipe (1)
    • The feed hose/pipe (2)

      Plug the open outlets to prevent fluid loss and contamination.

  3. Disconnect the evaporative emission (EVAP) quick connect fitting (3). Refer to Quick Connect Fitting(s) Service (Plastic Collar) .
  4. Open the retainer (4) located at the engine control module (ECM) bracket in order to remove the chassis hose/pipes.
    5. Fig 2: Identifying Afterboil Coolant Pump Bolts
    GM785768Courtesy of GENERAL MOTORS CORP.
  5. Disconnect the 2 cable harness clips (1) securing the engine wiring harness (4) to the ECM bracket (2).
  6. Remove the 2 bolts (3) securing the afterboil coolant pump to the ECM bracket, and position aside.
    7. NOTE: Always turn the ignition off when installing or removing the ECM connectors in order to prevent damage to the components.
    IMPORTANT: Ensure the ignition is in the OFF position.
    Fig 3: Locating ECM Ground Wire Retaining Screw
    GM785849Courtesy of GENERAL MOTORS CORP.
  7. Remove the screw (2) securing the engine control module (ECM) ground wire (1) to the ECM (3).
    8. Fig 4: View Of ECM Connectors & Wiring Harness Connectors
    GM785823Courtesy of GENERAL MOTORS CORP.
    NOTE: In order to prevent any possible electrostatic discharge damage to the ECM, do not touch the connector pins.
  8. Flip the release levers to the open position (3) and disconnect the ECM connectors (2) from the ECM (5).
  9. Remove the bolt securing the coolant inlet pipe to the ECM bracket.
    10. Fig 5: Identifying ECM Bracket Bolts
    GM785761Courtesy of GENERAL MOTORS CORP.
  10. Remove the ECM bracket bolts from the following:
    • The intake plenum
    • The cylinder head
  11. Remove the ECM bracket from the engine with the ECM still attached, and position aside.
    12. Fig 6: View Of Knock Sensor Pigtail, Knock Sensor Pigtail & Bracket
    GM785857Courtesy of GENERAL MOTORS CORP.
  12. Disconnect the electrical connector (2) from the right knock sensor pigtail (1).
    13. Fig 7: Locating Coil Pack Electrical Connector
    GM785822Courtesy of GENERAL MOTORS CORP.
  13. Disconnect the electrical connector (2) from the coil pack (1).
  14. Remove the coil pack retainer bolts.
    15. Fig 8: View Of J 43301 Installed Into Coil Pack
    GM411471Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: DO NOT overtighten the J 43301  .
  15. Thread the J 43301  into the coil pack.
  16. With even pressure, lift and remove the coil pack from the cam cover.
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