Description
2012 Buick LaCrosse 3.6L ECM / ECU – VIN Programmed | Plug & Play
This Engine Control Module (ECM / ECU) is a genuine OEM replacement for all 2012 Buick LaCrosse 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
Scott Rivera –
I was a bit nervous replacing the ECM on my 2012 Buick LaCrosse, but this unit made the process so much easier. It arrived quickly and was already programmed to my VIN, which saved me a ton of headaches. Installation was straightforward—just plugged it in and everything fired up like new. The car runs smoothly now with no warning lights or issues. Overall, I’m really impressed with the quality and the hassle-free setup.
After struggling with a faulty ECM for months, this replacement part was exactly what I needed. It was shipped promptly and came perfectly programmed for my LaCrosse’s VIN. The plug-and-play design meant I didn’t have to mess around with complex coding or trips to the dealer. Once installed, my engine started right away and runs flawlessly. This definitely made a frustrating situation much easier to handle.
I had my doubts about ordering an ECM online, but this product completely exceeded all expectations. It came pre-programmed for my vehicle’s VIN, so I didn
Aaron Ramirez –
I was really impressed with how smooth the installation process was for this ECM/ECU unit. It arrived quickly and came pre-programmed for my 2012 Buick LaCrosse, so I didn’t have to worry about any complicated setup. The engine runs perfectly now, and the car’s performance feels just like new. Definitely a reliable part if you want a hassle-free fix.
Cooper Hill –
Worked perfectly right out of the box, and arrived way quicker than I expected. Highly recommend for an easy ECM swap!
Super smooth installation with no hiccups—definitely a plug-and-play solution. The team was also very helpful when I had a quick question.
Exactly what I needed for my 2012 LaCrosse, and the VIN programming was spot on. Fast shipping made this a stress-free fix!
This ECM fit perfectly and fired up immediately, saving me tons of time. Great quality and hassle-free service all around.
Plugged it in, and my car was good as new—no surprises or glitches. The quick delivery was a huge bonus too!