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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 33 (AUTOMATIC TRANSMISSION - ALLISON - DIAGNOSTICS (DTCs P0878-P2723)) >> DTC P0978 >> Conditions for Setting the DTC

Conditions for Setting the DTC

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DTC P0978 sets when the TCM detects an open condition in the SS3 return circuit for greater than 2 seconds.

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