Description
2020 Cadillac CT6 3.6L ECM / ECU – VIN Programmed | Plug & Play
This Engine Control Module (ECM / ECU) is a genuine OEM replacement for all 2020 Cadillac CT6 3.6L models.
Each unit is VIN-programmed, updated, and fully tested for a true plug-and-play installation with no dealer visit required.
Built to OEM standards for reliability, calibration accuracy, and long-term performance.
Strict Testing & Quality Assurance
Every ECU is inspected, refreshed, and verified through advanced diagnostic tools. Testing includes:
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Complete communication & CAN-bus verification
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Sensor input/output and signal integrity checks
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Injector & ignition pulse simulation
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Power, ground, and load-circuit analysis
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Flash memory integrity and checksum validation
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Thermal and voltage-stress testing to confirm reliability
This ensures a fully functional, reliable, plug-and-play module you can install with confidence.
Important Note
Some vehicles equipped with IMMO (Immobilizer) or PATS (Passive Anti-Theft System) may require additional key programming after installation. This is normal for models where security data must be synchronized with the vehicle’s body control system.
For a 100% plug-and-play solution with no relearns, no key programming, and no compatibility issues, we recommend our ECU Cloning Service, which transfers all original security, immobilizer, and configuration data directly into the replacement unit.
Contact Us
Email: info@fixecm.com
Phone: Local: 647-247-8555 | Toll-Free: 1-800-915-5566
Jack Roberts –
Perfect fit for my 2020 CT6, arrived quickly and worked flawlessly right out of the box. Highly recommend for an easy, hassle-free upgrade!
Isaac Turner –
I was really impressed with how straightforward the installation was. The ECM came VIN programmed and was ready to go right out of the box, which saved me a lot of time and hassle. Shipping was surprisingly quick, and the quality feels top-notch. Definitely recommend this for anyone needing a reliable ECU replacement for their CT6.
Cooper Evans –
I recently replaced the ECM on my 2020 Cadillac CT6 with this VIN programmed unit, and I couldn’t be happier. Installation was straightforward—just plugged it in and everything fired up immediately without any hiccups. The shipping was surprisingly quick, which meant my car was back on the road in no time. I was a bit nervous about finding the right programmed module, but this one fit perfectly and works exactly as it should. It’s been smooth sailing ever since, and the car feels just like new. Highly recommend this to anyone needing a hassle-free swap.