Description
2014 GMC Sierra 2500 6.6L AT gas ECM / ECU – VIN Programmed | Updated
This Engine Control Module (ECM / ECU) is a genuine OEM replacement for all 2014 GMC Sierra 2500 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
Robert Howard –
Arrived quickly and was ready to go right out of the box—exact fit for my 2014 Sierra. No hassle, just perfect performance.
This ECM was a breeze to install, saved me a ton of time, and the VIN programming was spot on. Highly recommend!
Plugged in with zero issues and my truck runs smoother than ever—definitely worth every penny.
Super fast delivery and the unit matched my VIN perfectly; my 6.6L GMC is back in action without a hitch.
Perfect replacement part that worked instantly, making the whole repair stress-free and efficient.