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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1372 (Automatic Transmission - 2ML70 - DTC P0218 To DTC P0965-P0967) >> DTC P0721-P0723 >> Conditions for Setting the DTC >> P0721

Conditions for Setting the DTC: P0721

WARNING: This page is about a different car, the 2009 GMC Sierra and 2009 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The transmission control module detects an invalid Automatic Transmission Output Shaft Speed Sensor direction.

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