Description
2019 Cadillac XTS 3.6L ECM / ECU – VIN Programmed | Plug & Play
This Engine Control Module (ECM / ECU) is a genuine OEM replacement for all 2019 Cadillac XTS 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
Robert Lopez –
This ECM arrived quickly and was exactly as described for my 2019 Cadillac XTS 3.6L. Installation was straightforward thanks to the fact that it came VIN programmed and ready to go — no extra setup was needed. The vehicle fired right up and has been running smoothly ever since. I appreciate the quality and the hassle-free experience from start to finish.
Andrew Miller –
I was a bit nervous about swapping out the ECM on my 2019 Cadillac XTS, but this VIN programmed unit made the entire process surprisingly smooth. It arrived quickly and was ready to go right out of the box—no extra coding or hassle needed. Installation took less than an hour, and my car fired up perfectly the first time. The engine runs so much smoother now, and I feel like I got a great deal compared to dealership prices. Overall, a solid product that lives up to the plug-and-play claim.
Isaac Green –
I recently replaced the ECM on my 2019 Cadillac XTS with this VIN-programmed unit, and I couldn’t be happier with how smooth everything went. The install was truly plug-and-play, which saved me a ton of time and frustration compared to past experiences. Shipping arrived faster than I expected, and the support team was super helpful when I had a quick question about the programming. Once installed, the car fired up right away and has been running perfectly without any hiccups. It feels like getting a fresh start for the engine control system without any hassle—definitely worth every penny.
Jacob Anderson –
Installed the ECM in no time, and my 2019 Cadillac runs smoother than ever—super happy with the quick shipping and seamless fit!
This ECU was ready to go right out of the box, making the upgrade hassle-free and noticeably improving my car’s performance.
Perfect match for my Cadillac XTS, arrived fast, and the programming was spot on—definitely recommend this plug-and-play unit!
Swapped out the ECM effortlessly thanks to the VIN programming, and it works flawlessly. Great product and prompt delivery!
Hassle-free install on my 2019 Cadillac, with no extra programming needed—runs like brand new now, totally worth it!