Description
2009 GMC Sierra 4.3L ECM / ECU – VIN Programmed | Plug & Play
This Engine Control Module (ECM / ECU) is a genuine OEM replacement for all 2009 GMC Sierra 4.3L 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
Hunter Bell –
Swapped out my old ECM with this one and it fired right up—no hassle at all. Super fast delivery too!
This ECU was exactly as described and fit perfectly, making the install a breeze. Appreciate the quick shipping!
Got the programmed ECM for my Sierra, and it worked flawlessly on the first try. Very impressed with the straightforward plug-and-play setup.
Hassle-free replacement, arrived quicker than I expected. My truck runs smoother than ever with this ECU.
Easy install, no extra tuning needed. The support team was helpful when I had a couple questions, highly recommend!
Sean Bell –
The ECM arrived quickly and was exactly as described, already programmed to my truck’s VIN which made the installation incredibly straightforward. I was nervous about swapping out the ECU myself, but this unit fit perfectly with no additional tuning needed. After installation, my Sierra runs smoothly again, and I haven’t had any issues or warning lights. Really impressed with how hassle-free this was compared to other parts I’ve bought in the past.