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z Ensure that the spark plug has the correct heat range. An incorrect heat range causes the following { Spark plug fouling-Colder plug { Pre-ignition causing spark plug and/or engine damage-Hotter plug Spark Plug Inspection
2004 Hummer H2 2004 ENGINE PERFORMANCE Engine Controls (Introduction) - 4.8L, 5.3L, and 6.0L - Hummer H2
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