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Pontiac
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2005
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G6 GT
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Repair and Diagnosis
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Transmission
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Automatic Trans
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Automatic Transmission - Service, Diagnosis & Trouble Shooting
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Troubleshooting
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No Torque Converter Clutch (TCC) Release
No Torque Converter Clutch (TCC) Release
No TCC Release
Checks
Causes
TCC Solenoid (335)
Internal failure
A plugged fluid exhaust
An external ground
Torque Converter (55)
Internal failure
TCC Regulated Apply Valve (339) and TCC Control Valve (344)
Stuck in the TCC apply position