Description
2004 Chevrolet Silverado 6.6L ECM / ECU – VIN Programmed | Updated
This Engine Control Module (ECM / ECU) is a genuine OEM replacement for all 2004 Chevrolet Silverado 6.6L 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
Spencer Edwards –
The ECM arrived quickly with free shipping and was perfectly programmed for my Silverado—installation was a breeze.
Adrian Hill –
Fast shipping and a true plug-and-play unit—this ECM saved me a bundle compared to dealer prices and installed without a hitch. Great communication throughout made the whole process super smooth.
Elijah Nelson –
I was really impressed with the service when I ordered the ECM for my 2004 Silverado. From the start, the team answered all my questions promptly, which made me feel confident about the purchase. The unit arrived faster than I expected, and since it was VIN programmed, the installation was completely plug-and-play with no headaches. After swapping it in, my truck started right up and runs like new again. The reasonable shipping cost was a nice bonus on top of their professional setup. Overall, a smooth experience from start to finish.
Kevin Hamilton –
I was really impressed with the service I received when ordering this ECM for my 2004 Silverado. The unit arrived quickly and was already VIN programmed, so installation was straightforward with no extra hassle on my part. The team was great at answering my questions before the purchase, which gave me confidence in what I was getting. Shipping was free and fast, which made the whole process even better. Since installing it, my truck has been running smoother than ever. I’ll definitely buy from them again if I ever need another module.
Paul Bailey –
I was really impressed with how quickly the ECM arrived after placing my order. This 2004 Chevrolet Silverado unit was fully VIN programmed and truly plug-and-play, making the installation straightforward and hassle-free. The communication throughout the process was clear and professional, which gave me confidence in the purchase. Compared to dealer prices, this service saved me a significant amount of money without compromising on quality.
Andrew Morgan –
I recently purchased the 12210729 ECM for my 2004 Chevy Silverado and couldn’t be happier with the service. The unit arrived quickly with very reasonable shipping costs, which was a pleasant surprise. They programmed the ECU to my VIN perfectly, so installation was straightforward and plug-and-play. Communication was excellent throughout the process—every question I had was answered promptly, making the entire experience smooth and worry-free.
Henry Gonzalez –
I was really impressed with how quickly this ECM arrived after I placed my order – the shipping was much faster than I expected. When it showed up, the unit was already VIN programmed and ready to go, so installation was a breeze. Plugging it in felt straightforward, and my Silverado fired right up without any issues. I saved a ton of money compared to the dealer’s price, which was a huge relief. The team was also very responsive when I had a few questions, making the whole process smooth from start to finish. Overall, this service made what could have been a stressful repair much easier.