Description
2004 GMC Sierra 4.8L ECM / ECU – VIN Programmed | Updated
This Engine Control Module (ECM / ECU) is a genuine OEM replacement for all 2004 GMC Sierra 4.8L 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
John Marshall –
Fast shipping and the plug-and-play programming made installing this 2004 GMC Sierra ECM a breeze. The unit works perfectly, couldn’t be happier!
Shane Graham –
I’m really impressed with this 2004 GMC Sierra ECM. It arrived quickly and was ready to install right out of the box—just plug and play with no issues. The whole process was straightforward, and it saved me a ton compared to dealership prices. Customer support was helpful and responsive, making the experience smooth from start to finish.
Chase Jenkins –
Fast shipping and a true plug-and-play unit—installed in minutes. Saved me a bundle versus dealer pricing and the whole process was hassle-free.