Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSBUICK2015REGAL BASE, 2.0L ENG VIN X, AWDREPAIR AND DIAGNOSISGENERAL INFORMATIONRESET PROCEDURESPROGRAMMING AND SETUP - ALL SYSTEMSREPAIR INSTRUCTIONSK20 ENGINE CONTROL MODULE: PROGRAMMING AND SETUPREPLACE AND PROGRAM CONTROL MODULE

2015 Buick Regal Base, 2.0L Eng VIN X, AWD

Replace and Program Control Module

2015 Buick Regal Base, 2.0L Eng VIN X, AWDSECTION Replace and Program Control Module

To program a replacement K20 Engine Control Module (ECM), perform the following procedure:

Install EL-49642 SPS programming support tool.
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 the SPS function K20 Engine Control Module - Programming and follow the on-screen instructions.
Clear the DTCs after completing the Programming procedure.
Perform the SPS function Immobilizer Learn and follow the on-screen instructions. Refer to Immobilizer System Component Programming .
Perform the SPS function K20 Engine Control Module - Configuration & Setup and follow the on-screen instructions.
Clear DTCs after completing the Configuration & Setup procedure.

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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.