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2007
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Chevy Express G2500, Van Cargo, 6.6 6
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Repair and Diagnosis
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Transmission
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Hydraulic Diagrams
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Automatic Transmission - 4L80-E/4L85-E - Removal & Installation, Service, Overhaul, Troubleshooting & Diagnosis
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Diagnostic Information And Procedures
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Oil Out the Vent Tube
Oil Out the Vent Tube
Oil Out the Vent Tube
Checks
Cause
Pump Cover (206)
Cross channel leakage can pressurize the vent area.
Fluid
Foaming and filling the pump vent ports
Transmission is overfilled.
Transmission
Overheated