2018 Buick Regal BaseFACTORY OEM SERVICE PROCEDURE

Reprogram Control Module

WARNING: This page is about a different car, the 2020 Buick Regal TourX, 2020 Buick Regal, 2019 Buick Regal TourX, and 2019 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.

To program an existing K71 Transmission Control Module, perform the following procedure.

  1. Install EL-49642  SPS programming support tool.
  2. Access the Service Programming System (SPS) and follow the on-screen instructions.
  3. Perform one of the following SPS Programming functions:
      NOTE:

      If both controller options below are listed, select K71 Transmission Control Module

    • K20/K71 Engine and Transmission Control Modules and follow the on-screen instructions
    • K71 Transmission Control Module and follow on-screen instructions.
  4. Perform the Vehicle Setup, follow the on screen instructions.
  5. With a scan tool, clear DTCs from the K71 Transmission Control Module.
  6. Ignition OFF, allow vehicle systems to power down.
    NOTE:

    If may take up to 2 minutes for all vehicle systems to power down.

  7. Perform the Service Fast Learn (SFL), follow the on screen instructions.
    NOTE:

    If the transmission fluid temperature is not between 75 to 85°C (167 to 185°F) the scan tool will not allow the procedure to be performed.

  8. Ignition OFF for 2 minutes.
Factory Service Tools

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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.

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