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
Dylan Parker –
Fast shipping and the plug-and-play setup made installing this ECU on my 2004 Silverado a breeze. Highly recommend their professional programming service!
Allan Gray –
Fast shipping and the plug-and-play ECM fired up my Silverado immediately—saved me a bundle versus dealer prices. Installation was smooth and their communication kept me in the loop the whole time.
Victor Sharp –
I ordered the 12244189 ECM for my 2004 Silverado, and it arrived quickly with free shipping, which was a pleasant surprise. The unit was already VIN programmed, so installation was straightforward, and my truck fired right up without any issues. The team was also very responsive, answering my questions promptly and making the whole process smooth. Overall, great quality and excellent service.
Ethan Anderson –
I was really impressed with how smoothly this ECM arrived. The free shipping was a nice surprise and definitely saved me some money. It was already VIN programmed when it arrived, so installation was straightforward and I didn’t have to worry about any complicated setup. The performance of my Silverado has improved noticeably, and it runs like new again. I also appreciated the seller’s quick responses to my questions before I bought it, which helped me feel confident in my purchase.
Steven Sanders –
I had been struggling with my 2004 Silverado’s performance issues for weeks, so I decided to purchase this ECM unit. The fact that it came VIN programmed was a huge relief because I’m not very tech-savvy. Shipping was surprisingly fast and affordable, which was a pleasant bonus. When I reached out with a couple of questions, the support team responded quickly and helped me feel confident about the installation. After swapping the unit, my truck runs smoother than it has in years—definitely worth every penny.
Cooper Bell –
I was impressed with how quickly the ECM arrived after ordering—it was definitely faster than I expected. The unit came fully programmed for my 2004 Silverado, making the installation completely plug-and-play with no headaches. This saved me a ton of money compared to dealer prices, and the support team kept me updated throughout the process. Overall, a smooth experience from start to finish.