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Home >> Chevrolet >> 2004 >> TrailBlazer 4.2 S, RWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - 4.2L (Introduction) >> Repair Instructions >> Ignition Coil(s) Replacement >> Removal Procedure

Removal Procedure

  1. Remove the air cleaner outlet resonator. Refer to Air Cleaner Outlet Resonator Replacement .
    2. Fig 1: Disconnecting/Connecting Ignition Coil Electrical Connectors
    GM725541Courtesy of GENERAL MOTORS CORP.
  2. Disconnect the ignition coil connectors (1) from the ignition coils.
  3. Remove the retaining bolts (2) from the ignition coils.
    4. Fig 2: Removing/Installing Ignition Coils
    GM725545Courtesy of GENERAL MOTORS CORP.
  4. Remove the ignition coils (1) from the engine.
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