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: Local: 647-247-8555 | Toll-Free: 1-800-915-5566
Mason Walker –
The ECM arrived much quicker than I expected, which was a huge plus. Installation was straightforward since it was plug-and-play, and everything worked perfectly right out of the box. The team’s communication was clear and helpful throughout the process, saving me a lot compared to dealer prices. Overall, very satisfied with the smooth experience and quality of the unit.
Adrian Scott –
I was really impressed with how quickly the ECM arrived after placing my order—the fast shipping definitely caught me off guard in a good way. When I got the unit, it was plug-and-play just like they said, which made the installation process a breeze. The whole thing saved me a significant amount compared to dealer prices, and the communication from the seller was clear and professional throughout. My 2009 GMC Sierra has been running smoothly ever since, and I can’t recommend this service enough for anyone needing a reliable ECM replacement. It felt like a hassle-free experience from start to finish.
Leo Wright –
Fast shipping and a perfect plug-and-play fit—this ECM saved me a ton compared to dealer prices. The install was seamless and the service was top-notch.
Scott Clark –
I recently purchased the 12635901 ECM for my 2009 GMC Sierra, and I couldn’t be happier with the experience. The unit arrived quickly with free shipping, which was a nice bonus. What impressed me most was the hassle-free programming service they provided—I simply had to plug it in, and it was ready to go. Throughout the process, their team kept me in the loop and promptly answered all my questions, which made the whole replacement much less stressful. My truck is running smoother than ever, and I highly recommend this product and service to anyone needing an ECM replacement.
Patrick Miller –
I was a bit nervous about ordering an ECM online, but this 2009 GMC Sierra 4.3L unit arrived quickly and exactly as described. The best part was that it came VIN programmed and ready to go, so installation was straightforward with no hassle. The shipping was very reasonable and arrived well-packaged, which gave me confidence in the whole process. I also appreciated the clear communication from the seller—they kept me updated every step of the way and promptly answered all my questions. After installing it, my truck runs smoother than it has in years. Highly recommend!
Isaac Allen –
Great ECM for my 2009 GMC Sierra, arrived quickly with free shipping and was already VIN programmed for a seamless install. The communication was spot on—kept me updated every step of the way.
David Lewis –
I was really impressed with how smoothly everything went ordering this ECM for my 2009 GMC Sierra. The unit arrived quickly with free shipping, and it was already VIN programmed, so installation was a breeze. The communication from the seller was excellent—they answered all my questions promptly and kept me informed throughout the process. After the swap, my truck runs perfectly and I’m very satisfied with the quality of the part.