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Home >> GMC >> 2002 >> C3500 HD 8.1 G, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 8.1L >> Repair Instructions >> Spark Plug Wire Replacement >> Removal Procedure
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Removal Procedure

  1. Disconnect the spark plug wire at each spark plug.
    • Twist each spark plug wire 1/2 turn.
    • Pull only on the boot in order to remove the wire from each spark plug.
  2. Disconnect the spark plug wire from the ignition coil.
    • Twist each spark plug boot 1/2 turn.
    • Pull only on the boot in order to remove the wires from the ignition coil.
    Fig 1: Spark Plug Wire & Boot
    G01598999Courtesy of GENERAL MOTORS CORP.