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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 907 (Trailer Brake Control System) >> Diagnostic Information and Procedures >> DTC C056D or C056E >> Conditions for Setting the DTC >> C056D

Conditions for Setting the DTC: C056D

WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The TBCM detected a failure in its microprocessor.

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