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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission - 6L50/6L80/6L90 - DTC P0973 To DTC P2764 >> DTC P0973 or P0974 >> Conditions for Setting the DTC >> P0974

Conditions for Setting the DTC: P0974

The control solenoid (w/body and TCM) valve assembly detects an internal high voltage electrical malfunction of the SS 1 control circuit when the SS 1 is commanded ON for 300 milliseconds.