Get Your 6.6L Duramax Back on the Road, Fast.
A dead truck means lost time and money. If your 2013-2014 Silverado, Sierra, or Express van is suffering from erratic behavior, a no-start condition, or baffling error codes, a failing Engine Control Module (ECM) is the likely culprit. This isn’t just a replacement part; it’s the brain of your operation, restored. We provide a reliable, tested ECM that is professionally programmed to your truck’s specific Vehicle Identification Number (VIN), ensuring it works correctly right out of the box after the required security relearn procedure.
Common 6.6L Duramax ECM Failure Symptoms & Your Solution
A faulty ECM can cause a host of frustrating issues that can be difficult to diagnose. If your truck is experiencing any of the following, our programmed 12653319 ECM is the definitive solution to get you back to work.
- Complete no-start or crank-no-start condition.
- Intermittent stalling or engine shutting off while driving.
- Multiple unrelated diagnostic trouble codes (DTCs) stored.
- Check Engine Light is on with communication error codes like U0100.
- Poor engine performance, reduced power, or erratic shifting.
- Inability for scan tools to communicate with the engine computer.
Features & Benefits
- โ VIN-Programmed for Your Truck: We flash the unit with the latest GM software calibrations using your specific VIN. This eliminates compatibility guesswork and ensures your engine and transmission operate exactly as the factory intended.
- โ Restores Peak Performance: Correct programming restores lost power, optimizes fuel economy, and ensures smooth transmission shifting, getting your Duramax back to its reliable, workhorse status.
- โ Cost-Effective Solution: Get the reliability you need from a thoroughly inspected and tested used component, saving you significant cost compared to a new dealer part.
- โ Direct-Fit Replacement: This unit is a direct replacement for service numbers 12653319 and 12654088, guaranteeing a perfect physical fit in the factory location without any modifications.
- โ This unit is backed by our one-year replacement warranty.
An Expert’s Note on Installation: We’ve seen it countless timesโa customer buys a used ECM online, plugs it in, and the truck still won’t start. That’s because the ECM is the core of the vehicle’s anti-theft system. Our service of programming the unit to your VIN is the critical first step. The essential final step, which must be performed on the vehicle by the installer, is the security relearn (often called a ‘theft relearn’). While this requires a capable scan tool or access to GM’s system, it’s a non-negotiable part of the process that ensures your new computer communicates correctly with the rest of your truck. Getting a pre-programmed unit from us saves you the most complex step and sets you up for a successful final relearn.
Frequently Asked Questions
What information do I need to provide after ordering?
After you complete your purchase, you must provide us with your vehicle’s 17-digit VIN. We cannot program and ship your ECM without it. This ensures the computer has the correct software and calibrations for your specific truck.
Is this part ‘plug and play’?
Almost. While it is pre-programmed to your VIN, you will be required to perform a security relearn procedure (also known as a vehicle theft deterrent relearn) upon installation. In some cases, other relearns like crankshaft position variation or injector flow rate programming may also be necessary. This is the responsibility of the installer.
How do I know for sure that my ECM is the problem?
The most common signs are a complete no-start, no communication with a diagnostic scanner, or multiple random trouble codes that don’t seem related. However, these can also be signs of wiring or power supply issues. We always recommend a thorough diagnosis by a qualified technician to confirm the ECM is the point of failure before ordering.
Is this a new computer?
No, this is a high-quality, used ECM sourced from a salvaged vehicle. Each unit is inspected and tested to ensure it is fully functional before being programmed and shipped.
What vehicles does this programmed 12653319 ECM fit?
This ECM fits a wide range of 2013-2014 GM trucks and vans equipped with the 6.6L Duramax diesel engine, including the Silverado 2500/3500, Sierra 2500/3500 (including Denali), and Express/Savana 2500/3500 vans. Please refer to the detailed fitment list on this page to confirm compatibility.