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Home >> GMC >> 2006 >> Sierra 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1056 (Automatic Transmission - 6L50/6L80/6L90 - DTC P0973 To DTC P2764) >> DTC P2719, P2720 or P2721 >> Conditions for Setting the DTC >> P2721

Conditions for Setting the DTC: P2721

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The TCM detects an internal high voltage electrical malfunction of the clutch PC solenoid 4 control circuit for 300 milliseconds.

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