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Home >> GMC >> 2001 >> C3500 HD 8.1 G, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 8.1L - Repair Instructions >> Repair Instructions >> Spark Plug Replacement >> Removal Procedure
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Removal Procedure

  1. Remove the spark plug wires. Refer to Spark Plug Wire Replacement .
    2. Fig 1: View Of Spark Plug
    GM470690Courtesy of GENERAL MOTORS COMPANY
  2. Loosen each spark plug one or two turns.
  3. Brush or air blast away any dirt from around the spark plugs.
  4. Remove the spark plugs one at a time and place each plug in a tray marked with the corresponding cylinder numbers.
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