Description
2012 Chevrolet Silverado 3500 6.6L AT gas ECM / ECU – VIN Programmed | Updated
This Engine Control Module (ECM / ECU) is a genuine OEM replacement for all 2012 Chevrolet Silverado 3500 6.6L AT gas 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 may require key programming after installation. This is normal.
For a 100% plug-and-play solution with no relearns, your original ECU must be sent in for cloning. We transfer all security data to the replacement unit.
👉Add the cloning service as a bundle at checkout — $300 CAD / $215 USD
A prepaid shipping label will be emailed to you.
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
Mark Cox –
Arrived quickly and worked perfectly right out of the box—couldn’t ask for a smoother install. Definitely a reliable fix for my Silverado!
Eric Scott –
I was a bit nervous about replacing the ECM on my 2012 Silverado, but this unit arrived ready to go and was exactly what I needed. The fact that it came VIN programmed saved me a ton of time and hassle—just plugged it in and my truck fired right up without any issues. Shipping was surprisingly quick, and when I did have a couple questions, the support team was patient and really knowledgeable. It’s been a few weeks now, and the truck is running smoother than ever. Definitely a solid buy for anyone needing a reliable replacement.
Jose Johnson –
This ECM for my 2012 Silverado was exactly what I needed. It came pre-programmed to my VIN, so installation was straightforward with no headaches. The unit fit perfectly and the truck has been running smoother than before. Shipping was quick, and I appreciated the helpful customer support when I had a couple of questions.