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
Trevor Burton –
I was a bit nervous ordering an ECM online, but this unit for my 2014 GMC Sierra 4.3L arrived quickly and was exactly as described. The best part was that it came VIN programmed and ready to install, so I didn’t have to worry about any complicated setup. Throughout the process, the seller kept me updated on the shipping and programming status, which really helped ease my mind. Installation went smoothly, and the truck runs perfectly now—no more engine codes or performance issues. I’d definitely buy from them again if I ever need another module.
Dominic Miles –
I had been struggling with my 2014 GMC Sierra’s ECM for a while, and finding a replacement that was properly programmed was a challenge. This unit came VIN programmed and ready to install, which saved me a ton of hassle and trips to the mechanic. The shipping was surprisingly quick and free, so my truck was back on the road much sooner than I expected. The quality of the ECM feels top-notch, and everything has been running smoothly since. Overall, a great experience from ordering to installation.
Joel Sharp –
The VIN programming was spot on, and their quick responses made the whole process smooth and worry-free. Shipping was fast and affordable, too.
Cameron Willis –
I ordered the 12662034 ECM for my 2014 GMC Sierra, and I’m really impressed with the whole experience. The unit arrived quickly with free shipping, which was a nice bonus. It came VIN programmed, so installation was straightforward, and the engine is running smooth without any issues. The seller also kept me updated throughout the process, which gave me confidence in what I was getting.
Robert Lewis –
I’m really impressed with this ECM for my 2014 GMC Sierra. The shipping was surprisingly quick, and the unit arrived ready to go with the VIN already programmed. Installation was straightforward, and it worked flawlessly right away. Choosing this over a dealer repair saved me a significant amount of money, plus the customer service kept me updated every step of the way.
Jorge Torres –
Fast shipping and the plug-and-play unit worked perfectly, saving me a ton compared to dealer prices. Installation was smooth and the whole process was hassle-free.