Restore Peak Performance to Your GM Diesel Truck or Van
Is your 2006-2007 GM truck or van suffering from perplexing issues like stalling, no-start conditions, erratic behavior, or a persistent Check Engine Light? The Engine Control Module (ECM), the central computer of your Duramax LLY diesel engine, is often the source of these frustrating problems. This replacement ECM, part number 12604137, is the definitive solution to restore your vehicle’s reliability and power. It arrives fully programmed with the latest GM software updates, tailored specifically to your vehicle’s Vehicle Identification Number (VIN), ensuring a seamless, plug-and-play installation.
Diagnosing a Faulty 2006-2007 Savana 3500 ECM
A failing ECM can manifest in numerous ways, often mimicking other component failures. If you’re experiencing any of the following symptoms, a faulty engine computer could be the culprit. Proper diagnosis is key, but these are strong indicators that your module has reached the end of its service life.
From the Diagnostic Bay
We once had a 2006 Silverado 2500 HD in the shop that was on its third Fuel Injection Control Module (FICM) in a year. The owner was frustrated, having spent a fortune chasing what seemed to be a recurring FICM failure. The truck would run fine for a few weeks, then suddenly lose power and throw communication codes. On a hunch, we monitored the voltage supply from the ECM to the FICM. We discovered the ECM was intermittently dropping voltage, starving the FICM and causing it to fail. The root cause wasn’t the FICM at all; it was a failing 2006-2007 Savana 3500 ECM (the same part family) that was taking out other components. A single replacement of the correctly diagnosed ECM solved the problem permanently.
Common Symptoms of ECM Failure
- ✔ Check Engine Light: The most common sign, often with codes related to module communication (U-codes) or processor faults.
- ✔ Engine Stalling: Your engine may stall unexpectedly while driving or at idle for no apparent reason.
- ✔ No-Start Condition: The engine cranks but refuses to start, even with a good battery and starter.
- ✔ Reduced Power and Poor Fuel Economy: The ECM controls fuel delivery and turbo boost. A failure can lead to a noticeable drop in performance and efficiency.
- ✔ Erratic Shifting: The ECM communicates with the Transmission Control Module (TCM), and a fault can cause harsh or incorrect gear changes.
- ✔ Intermittent Electrical Issues: Fans running constantly or other modules acting strangely can sometimes be traced back to a faulty ECM.
A Reliable, Programmed Solution
Don’t settle for a generic, unprogrammed module that requires an expensive trip to the dealership. We take the guesswork out of the repair. Simply provide your vehicle’s VIN during checkout, and our technicians will flash this module with the precise software from GM for your specific application. This ensures all systems, from the injectors to the emissions controls, function exactly as intended. This module is a direct replacement for a wide range of part numbers, including 19260753, 12588335, 12606126, 12606127, 12603623, and YNAY, making it a versatile solution for many 2006-2007 GM diesel vehicles.
This ECM fits a variety of models including the Chevrolet Silverado 2500/3500, GMC Sierra 2500/3500, Chevrolet Express 2500/3500, and GMC Savana 2500/3500 equipped with the LLY diesel engine (VIN 2). Please verify the fitment list to confirm compatibility with your exact vehicle.
Frequently Asked Questions
Is this ECM ready to install when it arrives?
Yes! This ECM is sold as a fully programmed, plug-and-play solution. You must provide us with your vehicle’s VIN so we can flash it with the correct GM software before shipping. Once it arrives, you can install it directly into your vehicle.
Will I need to have a dealer perform any additional procedures?
In most cases, no dealer visit is required. The module is programmed to your VIN. Some vehicles may require a simple security relearn procedure, which can be done without any special tools and typically involves a sequence of key cycles. Instructions can be easily found online or we can assist.
How do I provide my VIN?
You can add your 17-digit VIN to the notes section during checkout or simply reply to your order confirmation email with the information. We cannot ship your part until we receive the VIN.
What if my original part number is not 12604137?
This ECM is a direct replacement for several part numbers, including 19260753, 12588335, 12606126, and more as listed in the description. As long as your vehicle is a 2006-2007 GM diesel listed in our fitment chart, this module will work when programmed to your VIN.
Where is the ECM located on my vehicle?
On Silverado and Sierra pickups, the ECM is typically located in the engine bay on the driver’s side, under the battery tray. On Express and Savana vans, it is usually found in the LH rear of the engine compartment.