Operation CHARM
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GMC Truck
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1989
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Suburban 1/2 Ton 4WD V8-454 7.4L
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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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Second Gear Start
Second Gear Start
1.
Governor
valve stuck.
2.
Governor
support pin too long or missing.
3. Forward sprag clutch assembly installed backwards.