Description
2004 GMC Sierra 6.0L ECM / ECU – VIN Programmed | Updated
This Engine Control Module (ECM / ECU) is a genuine OEM replacement for all 2004 GMC Sierra 6.0L models.
Each unit is VIN-programmed, updated, and fully tested for a true plug-and-play installation with our cloning service.
Built to OEM standards for reliability, calibration accuracy, and long-term performance.
Strict Testing & Quality Assurance
Every ECU is inspected, refreshed, and verified through advanced diagnostic tools. Testing includes:
Complete communication & CAN-bus verification
Sensor input/output and signal integrity checks
Injector & ignition pulse simulation
Power, ground, and load-circuit analysis
Flash memory integrity and checksum validation
Thermal and voltage-stress testing to confirm reliability
Important Note
Some vehicles with IMMO or PATS require key programming after installation. This is normal.
For a 100% plug-and-play solution, we recommend using our full cloning service. We transfer all security data to the replacement unit.
A prepaid shipping label will be emailed to you. Allow you to mail in your original computer to us for full cloning.
If cloning is not selected, the ECU will be VIN programmed, and a key relearn will be required after installation.
Contact Us
Email: info@fixecm.com
Phone: Local: 647-247-8555 | Toll-Free: 1-800-915-5566
David Murphy –
I purchased the 2004 GMC Sierra 6.0L ECM and was really impressed with the plug-and-play setup. The unit came VIN programmed and ready to install, which saved me a ton of hassle. Shipping was very reasonable, and the whole process was quick and straightforward. Definitely a reliable product that works just as expected.
Mason Marshall –
The ECM arrived super fast with free shipping, and the plug-and-play setup made installation a breeze. Great service and quality!
Harvey Roberts –
I needed a replacement ECM for my 2004 GMC Sierra 6.0L, and this unit was exactly what I was looking for. The fact that it came VIN programmed saved me so much hassle — it was basically plug-and-play right out of the box. The shipping was surprisingly quick and affordable, which is always a plus. I also appreciated how the seller kept me in the loop throughout the process, promptly answering my questions whenever I reached out. My truck has been running perfectly since the install, and I couldn’t be happier with the smooth experience.