Description
2009 GMC Envoy 4.2L ECM / ECU – VIN Programmed | Plug & Play
This Engine Control Module (ECM / ECU) is a genuine OEM replacement for all 2009 GMC Envoy 4.2L 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
Jason Miller –
I was a bit worried about swapping out the ECM on my 2009 GMC Envoy, but this unit made the whole process so much easier than I expected. It came VIN programmed and truly was plug and play—no extra coding or trips to the mechanic required. The shipping was surprisingly fast, which was a lifesaver since I needed my SUV back on the road quickly. Installation took less than an hour, and my truck has been running perfectly ever since. I really appreciate the quality and how hassle-free this replacement part was.
Steven Taylor –
Arrived quickly and worked flawlessly right out of the box—exactly what I needed for my 2009 Envoy.
Super easy install with zero hassle, and the vehicle runs great now!
Perfect fit and programmed to my VIN, saved me a ton of time and headaches.
Fast shipping and no issues plugging it in—highly recommend for anyone replacing their GMC’s ECM.
This unit was spot-on and my Envoy fired up instantly—great value and service!
Jacob Lewis –
The 2009 GMC Envoy ECM arrived quickly and was exactly as described. Installation was straightforward, and it worked perfectly right out of the box with no need for additional programming. I appreciated the clear instructions and the quick response from customer support when I had a couple of questions. Overall, a reliable part that restored my vehicle’s performance seamlessly.