LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Buick >> 2017 >> Encore Base >> Repair and Diagnosis >> General Information >> Reset Procedures >> Programming And Setup - All Systems >> Repair Instructions >> Human Machine Interface Control Module Programming and Setup >> Reprogram Control Module
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Reprogram Control Module

To program an existing control module, perform the following procedure:

    NOTE:

    The vehicle must remain in PARK during the programming procedure.

  1. Install the EL-49642  SPS Programming Support Tool.
    2. NOTE:

    If using a pre-configured USB drive supplied by General Motors, proceed to step 6.

  2. Connect a USB drive to the computer.
  3. Access the Service Programming System (SPS) and follow the on-screen instructions.
  4. On the SPS Supported Controllers screen, select K74 Human Machine Interface Control Module - USB Copy/USB File Transfer.
    NOTE:
    • If there are no files available for USB transfer via SPS, proceed to step 10.
    • Software currently loaded on the USB Drive will be verified and if files are incorrect they will be deleted and correct files will be loaded. If files residing on the USB Drive are correct for the vehicle being serviced, the Techline terminal will not delete those files and allow the drive to be re-used.
  5. Upon completion of the file transfer, remove the USB drive from the computer.
  6. Ignition ON, infotainment system ON.
    7. NOTE:

    The HMI will not allow the installation of the same software version via USB. If the same software is detected the installation process will not start.

  7. Connect the USB drive to the USB port in the vehicle.
  8. The infotainment system will recognize that update files are available. Follow the infotainment display on-screen instructions and select Update when prompted. Programming will take several minutes.
  9. Upon completion of programming, remove the USB drive. Follow the infotainment display on-screen instructions.
  10. Access the Service Programming System (SPS) and follow the on-screen instructions.
  11. On the SPS Supported Controllers screen, select K74 Human Machine Interface Control Module - Programming and follow the on-screen instructions.
  12. At the end of programming, choose the "Clear DTCs" function on the SPS screen.
  13. Ignition OFF, Retained Accessory Power (RAP) OFF, remove the key fob from range of the vehicle, and let the vehicle sit for five minutes. Retest system operation to verify the repair.
scientia non olet · About LEMON Manuals