LEMON Manuals
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GMC
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1998
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Jimmy 2D Utility, 4WD, Standard
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Repair and Diagnosis (Single Page)
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Engine Performance
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System
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Engine Controls - Tests W/O Codes - 4.3L
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Symptoms
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Engine Backfires
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Symptom Definition
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Symptom Definition
Fuel ignites within intake manifold or in exhaust system, making a loud popping noise.