GM Service Manual Online
For 1990-2009 cars only

No TCC Release

Checks

Causes

TCC Solenoid (335)

    â€¢ Internal failure
    â€¢ A plugged fluid exhaust
    â€¢ An external ground

Torque Converter (55)

Internal failure

TCC Regulated Apply Valve (339) and TCC Control Valve (344)

Stuck in the TCC apply position