Operation CHARM
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GMC Truck
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1991
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S15/T15 2WD P/U V6-173 2.8L
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Repair and Diagnosis
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Transmission and Drivetrain
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Automatic Transmission/Transaxle
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Testing and Inspection
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Symptom Related Diagnostic Procedures
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3L30 (180/180C) Automatic Transmission
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Low Fluid Level
Low Fluid Level
1. Fluid coming out of filler tube.
2. External fluid leak.
3. Defective vacuum modulator.