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Home >> GMC >> 1988 >> S15/T15 4WD Jimmy L4-151 2.5L >> Repair and Diagnosis >> Transmission and Drivetrain >> Automatic Transmission/Transaxle >> Testing and Inspection >> Symptom Related Diagnostic Procedures >> 3L30 (180/180C) Automatic Transmission >> Excessive Exhaust Smoke

Excessive Exhaust Smoke

1. Vacuum modulator failure.

2. Transmission fluid leaking on exhaust pipe.

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