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
Neil Lawrence –
Fast shipping and the plug-and-play ECM worked perfectly—definitely saved me a ton versus dealership prices. Installation was smooth and customer service was on point.
Jorge Mitchell –
Arrived quickly with free shipping and was perfectly programmed for my 2014 GMC Sierra—easy plug-and-play, no issues at all.
Luke Hayes –
I ordered the 12670744 ECM for my 2014 GMC Sierra, and I was impressed with how smooth the entire process was. The unit arrived quickly with free shipping, which was a nice bonus. What really stood out was their professional programming service; the ECM was already VIN programmed, so installation was straightforward with no extra hassle. Communication was clear throughout, and they promptly answered all my questions, making me feel confident about the purchase.
Brandon Ramirez –
I was really impressed with how smooth the whole process was purchasing this ECM for my 2014 GMC Sierra. The unit arrived quickly and was already VIN programmed, so installation was a breeze—definitely plug-and-play. The seller also kept me in the loop throughout, answering my questions promptly which helped put my mind at ease. Shipping was free, which was a nice bonus given the size of the part. After installing it, my truck runs like new again. Highly recommend this product and service if you need a reliable replacement ECM.
Patrick Webb –
I purchased the 12670744 ECM for my 2014 GMC Sierra 4.3L, and I’m really impressed with how quickly it arrived. The unit was fully VIN programmed and worked right out of the box, making installation straightforward and hassle-free. Compared to dealer prices, this saved me a bundle, and the communication with the seller was clear and professional throughout the process. Overall, a great experience and a reliable product.
Connor Russell –
I was really impressed with how smooth the entire process went when I ordered the 2014 GMC Sierra ECM. The unit arrived quickly with free shipping, and it was already VIN programmed, so installation was straightforward. What stood out most was the communication—they kept me informed at every step and promptly answered my questions about compatibility. After swapping out the old module, my truck fired up right away with no issues. This definitely exceeded my expectations for an online purchase of such a critical component.