Description
2009 GMC Sierra 4.3L ECM / ECU – VIN Programmed | Updated
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.Built to OEM standards for reliability, calibration accuracy, and long-term performance.
Strict Testing & Quality Assurance
This is not a brand-new unit. It is a rebuilt unit that is inspected, refreshed, and fully tested before shipping.
Testing includes communication, CAN-bus, sensor signal, power circuit, flash memory, and reliability checks.
Important Note
If your vehicle does not have an IMMO or PATS system, this unit will be directly plug&play.
If your vehicle has an IMMO or PATS system, it will require a key relearn after installation. You can visit your local locksmith for help.
We also offer a full cloning service. We transfer all security data to the replacement unit, so it will be a plug&play installation.
For all European cars, Hyundai, and Kia vehicles, we recommend adding our cloning service as a bundle.
For American and Japanese cars, we recommend doing a key relearn on-site.
Contact Us
Email: info@fixecm.com
Phone: 647-247-8555
Dylan Sharp –
The unit arrived quickly and was truly plug-and-play, saving me a bundle compared to dealer prices. Installation went smoothly, and their customer support was on point throughout.
Patrick Tucker –
I was really impressed with the service I received purchasing the 12635902 ECM for my 2009 GMC Sierra. The unit came VIN programmed and ready to go, which made installation a breeze with the plug-and-play setup. Shipping was free and arrived sooner than expected, adding to the overall great experience. Their team also answered all my questions promptly, which gave me peace of mind throughout the process.
Bruce Roberts –
Great quality ECM for my 2009 GMC Sierra, arrived quickly with free shipping and was ready to install right out of the box. Their team kept me informed the entire time, making the process smooth and hassle-free.
Jorge Sanders –
I was a bit nervous about ordering an ECM online for my 2009 GMC Sierra, but this purchase exceeded my expectations. The unit arrived quickly with free shipping, which was a huge bonus. What really impressed me was the plug-and-play setup—it arrived already VIN programmed and ready to install, so I didn’t have to worry about any complicated programming steps. The truck fired up instantly and runs like new again. Overall, a smooth, hassle-free experience that I’d recommend to anyone needing a replacement ECM.