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HOMESERVICE MANUALSCHEVROLET2020EXPRESS 2500 LS, 2.8L ENG VIN 1REPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTCOMMUNICATION DEVICESPROGRAMMING AND SETUPREPAIR INSTRUCTIONSK20 ENGINE CONTROL MODULE: PROGRAMMING AND SETUPREPLACE AND PROGRAM CONTROL MODULE
2020 Chevrolet Express 2500 LS, 2.8L Eng VIN 1

Replace and Program Control Module

2020 Chevrolet Express 2500 LS, 2.8L Eng VIN 1SECTION Replace and Program Control Module

To program a replacement K20 Engine Control Module (ECM), perform the following procedure:

  1. Access the Service Programming System (SPS) and follow the on-screen instructions.
  2. Before removing the old control module, perform the SPS function Prepare Control Module for Removal, if available.
    NOTE:

    The Prepare Control Module for Removal function can only be performed when communication with the old control module is still possible.

  3. Replace the ECM.
  4. Perform one of the following SPS Programming functions:
    NOTE:

    If both controller options below are listed, select K20/K71 Engine and Transmission Control Modules.

    • K20/K71 Engine and Transmission Control Modules and follow the on-screen instructions.
    • K20 Engine Control Module and follow on-screen instructions.
  5. Clear the DTCs after completing the Programming procedure.
  6. If equipped, perform the SPS function Immobilizer Learn and follow the on-screen instructions. Refer to Immobilizer System Component Programming .
  7. Perform the following SPS function:
    1. Setup
      NOTE:

      If both controller options below are listed, select K20 Engine Control Module.

      • K20/K71 Engine and Transmission Control Modules and follow the on-screen instructions.
      • K20 Engine Control Module and follow on-screen instructions.
    2. Configuration - If applicable
  8. If equipped, perform the Fuel Pressure Regulator Learn via GDS2, Engine Control Module, Configuration/Reset Functions, Learn Functions.
  9. Clear DTCs.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.