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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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No First or Second Gear/No Third or Fourth Gear
No First or Second Gear/No Third or Fourth Gear
No 1st or 2nd/No 3rd or 4th
Checks
Causes
2-3 Shift Solenoid Valve (367B)
Sediment is in the valves
The electrical connection is faulty
Damaged seal