Description
2017 GMC Sierra 5.3L ECM / ECU – VIN Programmed | Updated
This Engine Control Module (ECM / ECU) is a genuine OEM replacement for all 2017 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
Daniel Miller –
Fast shipping and the ECU came perfectly programmed for my 2017 GMC Sierra—installation was a breeze! The team answered all my questions quickly, making the whole process stress-free.
Isaac Brooks –
I ordered the 12678939 ECM for my 2017 GMC Sierra, and I was impressed with how quickly it arrived. The unit was plug-and-play, making installation straightforward without any hassle. This saved me a significant amount compared to dealer prices, and the team was very responsive when I had questions. Overall, a smooth experience from order to installation.
Liam Bates –
I was really impressed by how quickly this ECM arrived after I placed the order. The unit came VIN programmed and ready to go, so installation was completely plug-and-play with no hassle. It saved me a ton of money compared to the dealer quote, which was ridiculously high. The communication throughout the process was clear and helpful, making me feel confident in my purchase. After swapping it in, my 2017 GMC Sierra ran perfectly without any issues. I’m very happy with how smooth and stress-free the whole experience was.
Harrison Richardson –
I ordered the 12678939 ECM for my 2017 GMC Sierra, and the whole process was smooth from start to finish. The unit arrived quickly with free shipping, which was a nice bonus. They also provide professional VIN programming, so it was plug-and-play once I got it installed. Their communication was spot on—I always knew the status of my order and received prompt answers to my questions.
Joel Parker –
Fast shipping and the unit was totally plug-and-play—saved me a bundle versus dealer prices. Installation went smoothly and the communication was spot on.