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HOMESERVICE MANUALSCHEVROLET2025EQUINOX RS, 4WDREPAIR AND DIAGNOSISGENERAL INFORMATIONRESET PROCEDURESPROGRAMMING AND SETUP - ALL SYSTEMSREPAIR INSTRUCTIONSK56 SERIAL DATA GATEWAY MODULE: PROGRAMMING AND SETUPUNSUCCESSFUL PROGRAMMING RECOVERY
2025 Chevrolet Equinox RS, 4WD

Unsuccessful Programming Recovery

2025 Chevrolet Equinox RS, 4WDSECTION Unsuccessful Programming Recovery
NOTE:
  • Ensure the EL-52100  (MDI 2) is used when programming the vehicle. Using the EL-47955 (MDI) will result in a programming failure.
  • It may be necessary to use another EL-52100  (MDI 2) and/or cables to verify proper operation to eliminate the possibility of faulty equipment.
  • If Ethernet programming fails, ensure there is no fault in the Ethernet circuits between the X84 Data Link Connector and K56 Serial Data Gateway Module. Refer to Scan Tool Does Not Communicate with Vehicle to diagnose these Ethernet circuits.

In the event of an interrupted or unsuccessful programming event, perform the following steps:

  1. Exit Service Programming System (SPS) and disconnect all programming equipment from the vehicle.
  2. Disconnect all battery voltage or ignition voltage sources from the K56 Serial Data Gateway Module. All voltage sources must be removed for a minimum of 10 min. This can be done several ways and should be completed by using the least intrusive way. This can vary depending on vehicle and control module location and can be done by one of the options listed below:
    • Removing all fuses supplying battery voltage and ignition voltage to the control module.
    • Disconnecting all harness connectors from the control module.
    • Performing a 12 V battery disconnect by disconnecting the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection .
  3. Reconnect all battery voltage and ignition voltage sources to the K56 Serial Data Gateway Module.
  4. Close down the current session of Techline Connect and reopen a new session.
  5. Verify the K56 Serial Data Gateway Module, X84 Data Link Connector, and programming tool connections are secure and the tool software is up to date.
  6. Ignition/Vehicle OFF, ensure that the key fob is inside the vehicle and not moved for the duration of the programming to prevent an inadvertent power mode change during programming.
  7. Access the Service Programming System (SPS) and follow the on-screen instructions for the K56 Serial Data Gateway Module.
  8. Verify the K56 Serial Data Gateway Module can be programmed.
    • If the K56 Serial Data Gateway Module can not be programmed 
    1. Ignition ON/Vehicle in Service Mode for 1 min.
    2. Ignition/Vehicle OFF.
    3. Access SPS and follow the on-screen instructions for the K56 Serial Data Gateway Module.
      4. NOTE:

      If programming is still not successful after the second programming attempt, check the following:

      • For facilities using an internet firewall, ensure firewall settings are not blocking file downloads and/or require elevated rights.
      • For United States and Canada GM dealers, the appropriate firewall settings can be found in the GM DEALER INFRASTRUCTURE & SECURITY GUIDELINES (DISG) section 2.d.vii.
    4. Verify the K56 Serial Data Gateway Module can be programmed.
      • If the K56 Serial Data Gateway Module can not be programmed, replace the K56 Serial Data Gateway Module.
      • Go to next step: If the K56 Serial Data Gateway Module can be programmed
    5. Clear DTCs.
    • Go to next step: If the K56 Serial Data Gateway Module can be programmed 
  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.