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Home › Chevrolet › 2021 › Express 2500 LS, 2.8L Eng VIN 1 › Repair and Diagnosis › External Pages › Different car › Section 38 (Programming And Setup) › Repair Instructions › K34 Glow Plug Control Module: Programming and Setup › Unsuccessful Programming Recovery

Unsuccessful Programming Recovery

WARNING: This page is about a different car, the 2022 GMC Savana 3500, 2022 GMC Savana 2500, 2022 Chevrolet Express 3500, and 2022 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.

If programming a control module is not successful, perform the following procedure:

  1. Verify the control module, data link connector and programming tool connections are secure and the tool software is up to date.
  2. Ignition - On / Vehicle - In Service Mode
  3. Access SPS and follow the on-screen instructions for the control module: K34 Glow Plug Control Module

    Verify the control module programming is successful.

    • If the programming is not successful 
    1. Ignition/Vehicle - Off - For greater than 1 min
    2. Ignition - On / Vehicle - In Service Mode
    3. Access SPS and follow the on-screen instructions for the control module: K34 Glow Plug Control Module
      • If the programming is not successful - Replace the component: K34 Glow Plug Control Module
      • Go to next step: If the programming is successful
    4. All OK.
    • Go to next step: If the programming is successful 
  4. All OK.
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