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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 21 (Engine Controls And Fuel - 4.3L (LV1) - Diagnostic Information And Procedures (2 Of 2)) >> Diagnostic Information and Procedures >> DTC P1255 or P064A (Chassis Control Module) >> Circuit/System Verification

Circuit/System Verification

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  1. Ignition - On / Vehicle - In Service Mode
  2. Verify the component location is free of debris, clutter or any obstruction that may reduce airflow which could cause an overheat condition : K38 Chassis Control Module
    • If a condition exists 

      Repair or replace as necessary

    • Go to next step : If no condition exists 
  3. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

    Verify the DTC does not set.

    • If the DTC sets 

      Replace the component : K38 Chassis Control Module

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