Restore Peak Performance to Your 6.6L Duramax
Is your Sierra, Silverado, or Savana van down for the count? A faulty Engine Control Module (ECM) can bring your entire operation to a halt, causing frustrating no-start conditions, poor engine performance, and warning lights that won’t go away. This genuine used ECM, part number 12654088, is the reliable and cost-effective solution to get your heavy-duty truck back on the road and earning its keep. We take the guesswork out of the repair by pre-programming the module to your vehicle’s specific VIN, ensuring it communicates flawlessly with your truck’s systems right out of the box.
Common Symptoms of a Failing 6.6L Duramax ECM & Your Solution
If you’re experiencing any of the issues below, a failing engine computer is a likely culprit. This programmed module is designed to be the definitive fix for these problems:
- Complete no-start or intermittent starting issues
- Engine stalling unexpectedly while driving or at idle
- Noticeable loss of power and poor fuel economy
- Harsh or erratic automatic transmission shifting
- Check Engine Light illuminated with communication-related trouble codes (e.g., P0601, P0606)
- Scan tool cannot communicate with the ECM
By installing our professionally programmed 2013-2014 Duramax ECM 12654088, you can confidently resolve these issues and restore the factory performance your vehicle was designed for.
Features & Benefits
- ✔ VIN-Programmed for Your Truck: We flash the unit with the latest GM software updates using your vehicle’s VIN. This ensures perfect compatibility and function, saving you a trip to the dealer.
- ✔ Cost-Effective Repair: Get a reliable, tested OEM part without the high cost of a brand-new unit, putting your truck back in service for a fraction of the price.
- ✔ Direct Fit Replacement: Designed to replace service numbers 12654088 and 12653319, guaranteeing a perfect physical fit in the factory location.
- ✔ Restore Dependable Power: A correctly functioning ECM is critical for managing fuel injection, turbo boost, and emissions, bringing back the power and efficiency you depend on.
- ✔ One-Year Protection: This unit is backed by our one-year replacement warranty.
An Expert’s Note on VIN Programming: On modern diesel trucks like the 6.6L Duramax, the ECM is the central hub of a complex network. It constantly communicates with the Transmission Control Module (TCM), Body Control Module (BCM), and anti-theft system. Simply swapping in a used ECM without programming it to your specific VIN is a recipe for disaster. Our programming service ensures all these modules recognize each other, preventing system conflicts, immobilizer lockouts, and a host of performance issues. It’s the critical step for a successful repair.
Don’t let a bad computer keep your valuable asset parked. This 2013-2014 Duramax ECM 12654088 is your path to a reliable, lasting repair. After purchase, simply provide us with your VIN, and we’ll handle the complex programming before it ships.
Frequently Asked Questions
What is a “theft relearn” and will I need to do it?
A theft relearn procedure syncs the newly installed ECM with your vehicle’s anti-theft system and keys. In many cases, if the vehicle does not start after installation, this procedure is required. It must be performed using a professional-grade tool like GM’s TIS2Web system and is the responsibility of the installer.
How do I provide my VIN?
After you complete your purchase, you will receive instructions on how to send us your vehicle’s 17-digit VIN. We cannot ship your part until we receive this information, as the programming is specific to your truck.
Is this ECM compatible with my specific truck?
This ECM fits a wide range of 2013-2014 GM trucks and vans with the 6.6L LML Duramax diesel engine, including the Silverado/Sierra 2500/3500 and Express/Savana vans. Please check the detailed fitment list on this page to confirm your model is included. Providing your VIN ensures we program it correctly for your exact options.
What other “relearns” might be necessary after installation?
Depending on your specific vehicle and the original failure, your mechanic may need to perform additional procedures after installation. These can include a crankshaft position variation relearn or setting the fuel injector flow rates. These are standard procedures for this type of repair and are the responsibility of the end user.
Why choose a used, programmed ECM over a new one?
Our used ECMs offer a significant cost savings over a new part from the dealership. Each unit is sourced from a salvaged vehicle and tested for functionality. By having us program it, you get a part that is ready for installation and relearn procedures, saving you the high cost and hassle of dealer programming on a new module.