Get Your Workhorse Back on the Job, Fast.
A dead or malfunctioning truck isn’t just an inconvenience—it’s a hit to your bottom line. When the Engine Control Module (ECM) in your 2012 GM 6.6L Duramax-powered vehicle fails, you need a reliable, no-nonsense solution. This is it. This genuine OEM Engine Control Module, part number 12648344, is the brain of your engine, and we deliver it to your door fully programmed to your vehicle’s specific Vehicle Identification Number (VIN). Stop chasing intermittent electrical gremlins and get back the dependable power your work demands.
Common Symptoms & Your Solution
If your Silverado, Sierra, Express, or Savana is experiencing issues like a no-start condition, communication errors with diagnostic tools, erratic engine behavior, or specific Diagnostic Trouble Codes (DTCs) pointing to the ECM, a faulty module is the likely culprit. Replacing it with a generic, unprogrammed unit from a junkyard creates more problems than it solves. Our professional programming service makes this the definitive fix. By providing a Programmed 12648344 ECM flashed with the latest GM software updates for your exact VIN, we eliminate the guesswork and ensure all vehicle systems communicate correctly from the moment of installation.
- ✔ VIN-Programmed for Your Truck: Arrives ready for installation, flashed with the latest GM calibrations for your specific vehicle.
- ✔ Restores Factory Performance: Corrects engine performance issues caused by a failing computer, restoring proper fuel delivery, timing, and transmission control.
- ✔ Cost-Effective OEM Part: Get the reliability of an original equipment part without the high dealership price tag. This unit is a tested, functional component from a salvaged vehicle.
- ✔ Streamlined Installation: While some on-vehicle relearn procedures may be necessary, the critical programming is done for you, saving you a trip to the dealer.
- ✔ This unit is backed by our one-year replacement warranty.
An Expert’s Note on Duramax Electronics: The 6.6L Duramax platform is a complex system. The ECM doesn’t just manage the engine; it communicates constantly with the Transmission Control Module (TCM), Body Control Module (BCM), and anti-theft system. Using a Programmed 12648344 ECM that is specifically flashed to your VIN is non-negotiable for proper function. It ensures the intricate Pass-Key III+ or GMLAN anti-theft systems recognize the new module, preventing a frustrating no-start situation and ensuring all components work in harmony as the factory intended.
Frequently Asked Questions
Do I need to do any programming myself?
No. We handle the critical programming before shipping. The module will be flashed to your vehicle’s VIN with the latest GM software. However, upon installation, you may need to perform a vehicle security relearn (theft deterrent relearn) if the truck doesn’t start. This is a standard procedure and is the responsibility of the installer.
How do I provide my VIN?
After you complete your purchase, simply send us a message with your 17-digit Vehicle Identification Number (VIN). We cannot ship your order until we receive this information, as it is essential for the programming process.
Is this a new part?
No, this is a high-quality, used OEM part that has been sourced from a salvaged vehicle and thoroughly inspected. We then program it to ensure it functions correctly for your specific application.
What if my original part number is different?
This listing is specifically for part number 12648344. Please ensure your original module’s part number matches exactly. Using an incorrect part number, even if it looks similar, can cause compatibility issues.
What other relearn procedures might be needed?
Depending on your specific vehicle and circumstances, additional procedures like a crankshaft position variation relearn or injector flow rate programming may be necessary after installation. These are standard for this type of repair and should be performed by the technician installing the part.
Which vehicles does this Programmed 12648344 ECM fit?
This module fits 2012 Chevrolet Silverado 2500/3500, Express 2500/3500, GMC Sierra 2500/3500, Sierra Denali 2500/3500, and Savana 2500/3500 vans and pickups equipped with the 6.6L Duramax diesel engine.