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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 232 (Engine Controls - Trouble Shooting - No Codes - 4.8L, 5.3L & 6.0L) >> Symptoms >> Engine Backfires >> Symptom Definition

Symptom Definition

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Fuel ignites within intake manifold or in exhaust system, making a loud popping noise.