Description
2020 Chevrolet Silverado 4.3L ECM / ECU – VIN Programmed | Plug & Play
This Engine Control Module (ECM / ECU) is a genuine OEM replacement for all 2020 Chevrolet Silverado 4.3L 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:
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Complete communication & CAN-bus verification
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Sensor input/output and signal integrity checks
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Injector & ignition pulse simulation
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Power, ground, and load-circuit analysis
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Flash memory integrity and checksum validation
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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
Jack Wright –
This ECM arrived quickly and was exactly what I needed for my 2020 Silverado 4.3L. Installation was straightforward since it was truly plug and play, saving me a lot of time and hassle. After installing it, the truck runs smoothly and all the engine codes cleared up immediately. Great quality part with solid customer support to help guide me through the process.
Carlos Perez –
The ECM arrived quickly and was ready to go right out of the box—installation took minutes and my Silverado runs perfectly now. Highly recommend for anyone needing a hassle-free ECU upgrade.
Super impressed with how smooth this plug-and-play unit was—no glitches, no extra programming on my end, just pure convenience. Shipping was fast too!
Perfect fit and exactly what my 2020 Silverado needed. The VIN programming was spot on, making the swap a breeze with zero complications.
This ECM installed in no time and got my truck back to peak performance instantly. Great product, and the support team was quick to answer my questions.
Fast delivery and a seamless setup with this pre-programmed ECU. My Silverado drives like new, and I didn’t have to mess with any complicated installs.
Patrick Johnson –
I was a bit nervous about replacing the ECM myself, but this unit made the job so much easier than I expected. It arrived surprisingly fast, and since it was already VIN programmed, I just plugged it in with no hassle at all. My Silverado fired right up and runs smoother than it has in years. Having this kind of seamless fit saved me a trip to the shop and a big expense. Definitely glad I found a part that’s truly ready to go out of the box.