LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Chevrolet >> 2021 >> Trailblazer L >> Repair and Diagnosis >> Steering >> Power Steering System >> Diagnostic Information and Procedures >> DTC C0051 >> Circuit/System Verification
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Circuit/System Verification

DTC C0051 4B

  1. Ignition ON.
  2. Verify that DTC C0051 4B is not set.
    1. Verify that DTC C0051 4B is not set.
      • If the DTC C0051 4B is set 

        Replace the Steering Column.

      • Go to next step: If the DTC C0051 4B did not set 

        Go to next step: All OK.

    • Go to next step: If the DTC C0051 4B is not set 
  3. All OK.

DTC C0051 58

  1. Verify that all harness connectors are installed properly at the K43 Power Steering Control Module.
    • If a harness connector at the K43 Power Steering Control Module is not installed properly 
    1. Connect the appropriate harness connector properly at the K43 Power Steering Control Module.
    2. Verify the DTC does not set.
      • If the DTC sets, replace the Steering Column.
      • Go to next step: If the DTC does not set
    3. All OK.
    • Go to next step: If all harness connectors at the K43 Power Steering Control Module are installed properly 
  2. Ignition ON.
  3. Verify the scan tool Steering Wheel Angle parameter changes when turning the steering wheel.
    • If the parameter does not change 

      Replace the Steering Column.

    • Go to next step: If the parameter changes 
  4. All OK.

DTC C0051 5A

  1. Ignition ON.
  2. Verify that DTC C0051 5A is not set.
    • If the DTC C0051 5A is set 
    1. Verify that the steering wheel angle alignment is correct. Refer to Wheel Alignment - Steering Wheel Angle and/or Front Toe Adjustment
    2. Calibrate the K43 Power Steering Control Module. Refer to Power Steering Control Module Calibration 
    3. Initialize the steering wheel angle sensor by driving the vehicle in a straight line at 20 kp/h (12 mp/h) for 2 seconds and then at 65 kp/h (40 mp/h) for 2 seconds.
    4. Verify that DTC C0051 5A is not set.
      • If the DTC C0051 5A is set 

        Replace the Steering Column.

      • Go to next step: If the DTC C0051 5A did not set 

        Go to next step: All OK.

    • Go to next step: If the DTC C0051 5A is not set 
  3. All OK.
scientia non olet · About LEMON Manuals