Description
2019 GMC Sierra 5.3L ECM / ECU – VIN Programmed | Plug & Play
This Engine Control Module (ECM / ECU) is a genuine OEM replacement for all 2019 GMC Sierra 5.3L models.
Each unit is VIN-programmed, updated, and fully tested for a true plug-and-play installation with no dealer visit required.
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
This ensures a fully functional, reliable, plug-and-play module you can install with confidence.
Important Note
Some vehicles equipped with IMMO (Immobilizer) or PATS (Passive Anti-Theft System) may require additional key programming after installation. This is normal for models where security data must be synchronized with the vehicle’s body control system.
For a 100% plug-and-play solution with no relearns, no key programming, and no compatibility issues, we recommend our ECU Cloning Service, which transfers all original security, immobilizer, and configuration data directly into the replacement unit.
Contact Us
Email: info@fixecm.com
Phone: Local: 647-247-8555 | Toll-Free: 1-800-915-5566
Jason Walker –
This ECM arrived quickly and was exactly what my 2019 Sierra needed—installation was seamless with no hiccups.
Super impressed with how easy it was to swap out the ECU; my truck runs like new again thanks to the perfect VIN programming.
Plugging in this ECM was a breeze, and the truck fired right up without a single issue.
Fast shipping and a flawless fit—this programmed ECU got my Sierra back on the road in no time.
The VIN-matched ECM was spot on, making for a simple install and immediate performance boost.
Sean Edwards –
Installation was straightforward and didn’t require any extra programming on my end, which saved me a lot of time. The unit fit perfectly on my 2019 GMC Sierra 5.3L, and it came pre-programmed with the correct VIN as promised. Shipping was quick, and I appreciated the helpful customer support team who answered my questions promptly. Overall, a hassle-free upgrade that works exactly as expected.
Scott Clark –
I was a bit nervous about ordering an ECM online, but this one for my 2019 GMC Sierra fit perfectly and came already programmed to my VIN. Installation was straightforward—literally just plug and play—and within minutes my truck was back to running smoothly. I appreciated how quickly it arrived and the clear instructions that came with it. If you’re hesitant about swapping out your ECU, don’t be—this made the whole process stress-free. Definitely saved me a trip to the dealership and a lot of money.