Description
2012 GMC Sierra 5.3L ECM / ECU – VIN Programmed | Updated
This Engine Control Module (ECM / ECU) is a genuine OEM replacement for all 2012 GMC Sierra 5.3L 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
Ian Tucker –
Fast shipping and the plug-and-play unit worked perfectly, saving me a ton compared to dealer prices. Installation was a breeze and the service was super professional.
Nathan Scott –
I was really impressed with the service from start to finish. The ECM arrived quickly with free shipping, and it was already VIN programmed, so installation was straightforward. Their team answered all my questions promptly, which made the whole process much less stressful. The truck runs perfectly now, and I couldn’t be happier with the quality and support.
Paul Hill –
Great product with flawless plug-and-play programming, and the shipping was fast and affordable.
Adam Phillips –
I was really impressed with how smoothly the entire process went. The ECM arrived quickly, and it was already VIN programmed, so installation was literally plug-and-play with no hassle. I had a few questions before ordering, and their customer service responded promptly and clearly, which made me feel confident about my purchase. Shipping was free, which was a nice bonus on top of everything. Since swapping out the module, my Sierra runs like new again—no more check engine lights or performance issues. Overall, a top-notch experience from start to finish.
Matthew Cooper –
The 2012 GMC Sierra ECM arrived quickly and was exactly as described. Installation was straightforward since the unit came pre-programmed for my VIN, making it truly plug-and-play. This saved me a huge amount compared to dealer pricing, and the team’s communication was clear and professional throughout the process. Overall, a smooth experience and highly recommended for anyone needing a reliable replacement.
Dominic Tucker –
I was really impressed with the service from start to finish. The 2012 GMC Sierra 5.3L ECM arrived quickly and was already VIN programmed, which saved me a ton of hassle. What stood out the most was how smooth the installation went—it was essentially plug-and-play. They also kept me in the loop throughout the process, answering my questions promptly and making sure I felt confident with the purchase. Overall, fantastic quality and a seamless experience that got my truck back on the road in no time. Would definitely recommend for anyone needing a reliable ECM replacement.