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Hummer
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2008
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H3 Adventure, Automatic
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Repair and Diagnosis
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Transmission
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Hydraulic Diagrams
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Automatic Transmission - 4L60-E - Removal & Installation, Service, Overhaul, Troubleshooting & Diagnosis
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Diagnostic Information And Procedures
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Third Gear Only
Third Gear Only
Third Gear Only
Checks
Causes
System Voltage
12 volts not supplied to transmission
Electrical short (pinched solenoid wire)
Solenoid not grounded