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Home >> GMC >> 1989 >> Forward Control 5.7 K, Automatic, 475/M40 >> Repair and Diagnosis >> Engine Performance >> System >> CCC Tests W/O Codes >> Surges &/Or CHUGGLE >> Symptom Definition
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Symptom Definition

Engine power variation under steady throttle or cruise condition. Feels like vehicle speeds up and slows down without changing accelerator pedal position.