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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1580 (Antilock Brake System - Hybrid (Hp2) With Traction Control System & Stability Control System) >> Diagnostic Information and Procedures >> DTC C012C, C121A, C128C, C128F, C12B9, C12BA, C12BB, or C12F7 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2010 GMC Sierra and 2010 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Using a scan tool, perform the EBCM, Module Setup, EBCM Relearn.
  2. Verify that DTC C012C, C121A, C128C, C128F, C12B9, C12BA, C12BB or C12F7 is not set.
    • If the DTC is set replace brake pressure modulator valve assembly. If the DTC resets, replace the EBCM.