Replace and Program 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 a replacement K20 Engine Control Module (ECM), perform the following procedure:

Access the Service Programming System (SPS) and follow the on-screen instructions.
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.
Replace the ECM.
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.
Clear the DTCs after completing the Programming procedure.
If equipped, perform the SPS function Immobilizer Learn and follow the on-screen instructions. Refer to Immobilizer System Component Programming (without BTM) , or Immobilizer System Component Programming (with BTM) .
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
If equipped, perform the Fuel Pressure Regulator Learn via GDS2, Engine Control Module, Configuration/Reset Functions, Learn Functions.
Clear DTCs.