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Home >> Hummer >> 2003 >> H2 >> Repair and Diagnosis >> External Pages >> Different car >> Section 409 (Engine Controls - 4.3L (Introduction)) >> Repair Instructions >> Spark Plug Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2004 GMC Sierra and 2004 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect the spark plug wire from the spark plug.
    1. Twist the boot 1/2 turn before removing the boot.
    2. Pull only on the boot or use a tool designed for this purpose in order to remove the wire from the spark plug.
  2. Loosen the spark plug 1 or 2 turns.
  3. Brush or air blast away any dirt from around the spark plug.
  4. Remove the spark plug. If removing more than 1 plug, place each plug in a tray marked with the corresponding cylinder number.
    5. Fig 1: View Of Spark Plug And Sparkplug Seat
    GM14824Courtesy of GENERAL MOTORS CORP.
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