C 2500 Suburban 2WD V8-8.1L VIN G (2001)
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Inspect the insulator (2) for flashover or carbon tracking, soot. This is caused by the electrical charge traveling across the insulator (2) between the
terminal post (1) and ground. Inspect for the following conditions:
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Inspect the spark plug boot for damage.
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Inspect the spark plug recess area of the cylinder head for moisture, such as oil, coolant, or water. A spark plug boot that is saturated causes
arcing to ground.
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Inspect the insulator (2) for cracks. All or part of the electrical charge may arc through the crack instead of the electrodes (3, 4).
