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Home >> Chevrolet >> 2009 >> Uplander Base, 3.9 M >> Repair and Diagnosis >> Brakes >> Traction Control >> Antilock Brake System >> Diagnostic Information and Procedures >> DTC C0121 >> Circuit/System Verification
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Circuit/System Verification

  1. Ignition ON, perform the Solenoid Tests with a scan tool and listen/feel the solenoids clicking.
  2. Verify that DTC C0121 is not set.
    • If DTC is set, replace the EBCM and verify DTC does not reset. If DTC resets replace the BPMV.
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