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 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
Jose Willis –
I was a bit nervous ordering an ECM online, but this one for my 2004 Silverado arrived exactly as described and was already VIN programmed, which saved me a ton of hassle. The shipping was free and surprisingly fast, getting here in just a few days. Installation was straightforward thanks to their plug-and-play setup, and everything fired up perfectly on the first try. Customer service was also great—they answered my questions quickly and made sure I knew what to expect throughout the process. Overall, a smooth experience and my truck runs like new again. Highly recommend this seller.
Aiden Miles –
The ECU arrived quickly with free shipping and was perfectly programmed for my Silverado—everything worked flawlessly right out of the box.
Outstanding communication throughout the process and the plug-and-play setup made installing the ECM on my 2004 Silverado a breeze.
Fast turnaround and the programming service was spot on; my truck fired up immediately with no issues after installation.
They answered all my questions promptly and shipped the PCM super fast—couldn’t ask for better service or quality.
Great repair quality and the unit was already VIN programmed, saving me a ton of hassle on installation.
Henry James –
I was really impressed with how smooth the entire process went when I ordered the ECM for my 2004 Silverado. The unit arrived quickly, and it was already VIN programmed, which saved me a ton of time and hassle. The team was great at keeping me updated throughout the shipping process, so I knew exactly when to expect it. Installation was straightforward, and my truck runs like new again. Definitely a reliable source I’d turn to again without hesitation.
Hunter Allen –
I ordered the 15231599 ECM for my 2004 Chevrolet Silverado, and the whole process was smooth from start to finish. The unit arrived quickly with free shipping, which was a nice bonus. They also did a great job with the VIN programming before shipment, so it was literally plug-and-play when I got it. I appreciate how responsive their team was when I had a couple of questions along the way.