Description
2014 GMC Sierra 4.3L ECM / ECU – VIN Programmed | Updated
This Engine Control Module (ECM / ECU) is a genuine OEM replacement for all 2014 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
Travis Rogers –
I was really impressed with how smoothly everything went from start to finish. The ECM arrived quickly with free shipping, which was a nice bonus. What stood out most was that it came fully VIN programmed, so installation was basically plug-and-play. I didn’t have to worry about tuning or extra trips to a mechanic, which saved me a lot of hassle. The quality feels solid, and my Sierra runs like new again. Definitely recommend this if you want a hassle-free replacement.
Bruce Page –
I was really impressed with how quickly this ECM arrived—shipping was way faster than I expected. Installing it in my 2014 GMC Sierra was a breeze since it came fully programmed and ready to go right out of the box. The whole process saved me a ton compared to the dealer’s quotes, which were shockingly high. The team’s communication was clear and professional, answering all my questions before I bought. Everything worked perfectly after installation, and my truck runs smoother than ever. Definitely a smart choice if you want quality and savings.
Jason Hill –
Received my 2014 GMC Sierra ECM quickly with free shipping, and it was already programmed to my VIN—super convenient and hassle-free!
Jose Palmer –
I’m really impressed with how quickly this ECM arrived—it was shipped faster than I expected. The unit was truly plug-and-play, making the installation hassle-free even though I’m not a mechanic. Their service saved me a ton compared to dealership prices, and the communication was clear throughout the process. Overall, a smooth experience from start to finish.
Harrison Kelly –
I purchased the 12686381 ECM for my 2014 GMC Sierra 4.3L, and the entire process was seamless. The unit arrived quickly with free shipping, which was a nice bonus. What impressed me most was the professional VIN programming service they provided—once installed, it worked perfectly without any additional setup. The quality of the part is top-notch, and I’m very satisfied with my purchase.
Eric Turner –
The shipping was super fast, and the plug-and-play ECM worked perfectly right out of the box—definitely saved me a fortune versus dealer pricing. Installation went smoothly thanks to the clear instructions and great communication.