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Home >> GMC >> 1999 >> Forward Control 6.5 F, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls Tests W/O Codes >> Symptoms (Gasoline) >> Engine Dieseling/Run-On >> Symptom Definition
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Symptom Definition

Engine continues to run (but very rough) after ignition is turned off. If engine runs smoothly, check ignition switch.

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