Description
2004 GMC Sierra 6.6L ECM / ECU – VIN Programmed | Updated
This Engine Control Module (ECM / ECU) is a genuine OEM replacement for all 2004 GMC Sierra 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
Andrew Cox –
I was really impressed with how quickly this ECM arrived—shipping was way faster than I expected. When it came time to install, it was literally plug-and-play, which made the whole process so much easier than I anticipated. The VIN programming was spot on, so the truck fired right up without any issues. Compared to the dealer’s quote, I saved a huge amount of money, which made this purchase even better. The seller was also very responsive, answering all my questions promptly. Overall, a smooth experience from start to finish.
Joel Roberts –
The 2004 GMC Sierra ECM I ordered arrived quicker than I expected, which was a relief. Installation was straightforward since the unit was plug-and-play, making the whole process stress-free. The support team was responsive and helped me avoid the steep costs the dealer wanted to charge. Overall, this service saved me a lot of money and got my truck running perfectly again.
Marcus Moore –
Fast shipping and truly plug-and-play—this ECM fit perfectly and saved me a bundle compared to dealer pricing. Professional service made the whole process hassle-free.
Harvey Russell –
The programming service was spot on and the free shipping made the whole process super easy. Great communication throughout!