Description
2011 GMC Sierra 5.3L ECM / ECU – VIN Programmed | Plug & Play
This Engine Control Module (ECM / ECU) is a genuine OEM replacement for all 2011 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:
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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
Luke King –
The ECM arrived quickly and was exactly as described—pre-programmed and ready to go. Installation took less than an hour, and the truck fired up without any hiccups. I appreciated the clear instructions and the helpful customer support when I had a couple of questions. Overall, a smooth and reliable solution for my 2011 Sierra’s engine management.
Lucas Rivera –
I was a bit nervous about ordering a replacement ECU for my 2011 GMC Sierra, but this unit exceeded my expectations. It arrived much quicker than I thought, and the VIN programming was spot on. Installation was truly plug-and-play—no extra coding or trips to the mechanic needed. After swapping it in, my truck fired up right away and runs smoother than it has in years. Definitely a hassle-free fix that saved me a lot of time and money.
This ECM for my 2011 Sierra fit like it was made just for my truck. The fact that it comes VIN programmed really took the stress out of the whole process. I was worried I’d have to deal with complicated setups, but it was just a straight swap and the engine computer communicated perfectly with everything else. The seller’s support team was also really helpful when I had a quick question before ordering. It’s great to find a product that just works as promised.
I replaced the ECU on my 2011 GMC
Ethan Gray –
Installed this ECM in minutes with zero hassle, and my Sierra runs like new again—highly recommend for a smooth upgrade!
Quick delivery and perfect fit; the VIN programming saved me so much time and headaches.
Super easy swap and flawless operation right out of the box—exactly what I needed to get my truck back on the road fast.
This ECU was ready to go as promised, and their support team answered all my questions promptly.
Had my 2011 Sierra firing on all cylinders within an hour thanks to this true plug-and-play module.