Description
2009 Cadillac STS 3.6L ECM / ECU – VIN Programmed | Plug & Play
This Engine Control Module (ECM / ECU) is a genuine OEM replacement for all 2009 Cadillac STS 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
Kyle Phillips –
This ECM was exactly what my 2009 Cadillac needed—came pre-programmed and installed without a hitch. Super quick delivery too!
Plugging this ECU in was effortless, and my STS runs smoother than ever. Definitely worth every penny!
Got this unit fast and it worked perfectly out of the box, no extra programming required. Highly recommend for anyone needing a reliable replacement!
The VIN programming was spot on, and the install was as simple as it gets. My Cadillac is back in business with zero issues.
Fantastic product that arrived ahead of schedule and fit my car like it was made for it. Makes the whole repair process so much easier!