Restore Peak Performance to Your Duramax Diesel
Is your 2006-2007 GMC Sierra, Chevrolet Silverado, or GM Express/Savana van running rough, refusing to start, or displaying a persistent check engine light? The Electronic Control Module (ECM), the central computer of your vehicle’s powertrain, is often the source of these frustrating and complex issues. This replacement ECM, part number 12606126, is the definitive solution to restore your truck’s reliability and power. It arrives at your door pre-programmed with the latest GM software updates, specifically flashed to your vehicle’s unique Vehicle Identification Number (VIN). This ensures a seamless installation process and restores factory-correct engine operation.
From the Diagnostic Bay
We had a 2006 Silverado 2500 with the LLY Duramax towed in last month. The owner was at his wits’ end. The truck would crank but not start intermittently. Sometimes it would run for a week without issue, then leave him stranded. He’d already replaced the fuel filter and checked the FICM voltages, which were fine. After connecting our scan tool, we noticed a complete loss of communication with the ECM during the no-start events. We traced the wiring and confirmed all powers and grounds were solid. The culprit was an internally failing ECM. After installing one of our VIN-programmed modules, the truck fired up on the first try and has been running perfectly ever since. These intermittent communication failures are a classic sign of a failing computer.
Is Your Truck Showing Signs of a Failing 2006-2007 Sierra 2500 ECM?
A faulty ECM can manifest in numerous ways, often mimicking other component failures. If you’re experiencing any of the following symptoms, a failing engine computer could be the underlying cause. Replacing it can save you time and money spent on misdiagnosing other parts.
Common Symptoms of a Failing Diesel ECM
- ✔ Intermittent or complete no-start conditions
- ✔ Check Engine Light (CEL) with communication-related trouble codes (U-codes)
- ✔ Poor engine performance, hesitation, or stalling
- ✔ Reduced fuel economy
- ✔ Erratic transmission shifting behavior
- ✔ Injector balance rate issues that aren’t resolved by replacing injectors
- ✔ Inconsistent or non-functional gauges on the instrument cluster
Plug-and-Play Installation Process
Our goal is to make your repair as straightforward as possible. Unlike modules from a dealership, this ECM comes ready to install. Simply provide us with your vehicle’s 17-digit VIN during or after checkout. Our technicians will program the unit with the correct software for your specific truck, ensuring all systems communicate correctly. While this module is plug-and-play, some vehicles may require a security relearn procedure (often called a Passlock or anti-theft relearn), which is a simple process that can be done without any special tools. Instructions are readily available online or in your vehicle’s service manual.
Guaranteed Fitment
This ECM is a direct replacement for several part numbers and fits a range of GM diesel trucks and vans. Please verify your vehicle is on the list below. This unit is compatible with service number YNAY and part numbers 19260753, 12588335, 12606126, 12606127, 12603623, and 12604137.
- 2006-2007 Chevrolet Silverado 2500/3500 Pickup (Diesel)
- 2006-2007 GMC Sierra 2500/3500 Pickup (Diesel)
- 2006-2007 Chevrolet Express 2500/3500 Van (Diesel)
- 2006-2007 GMC Savana 2500/3500 Van (Diesel)
Note for 2007 models: This part is for the ‘Classic’ body style with the creased door skin.
Frequently Asked Questions
Do I need to do any programming myself?
No. We handle all the programming before the module is shipped. You just need to provide us with your vehicle’s VIN. In some cases, a simple, tool-free security relearn procedure may be necessary after installation.
Where is the ECM located on my truck?
On 2006-2007 Sierra and Silverado pickups, the ECM is located in the engine bay on the driver’s side, mounted under the battery tray. On Express and Savana vans, it is typically found in the LH rear of the engine compartment.
Is this a brand new part?
This is a high-quality, tested replacement part guaranteed to function to OEM specifications. Each unit undergoes rigorous inspection and programming to ensure reliability and performance for your vehicle.
What happens if I provide the wrong VIN?
The programming is specific to the VIN. An incorrect VIN will cause the module to not work with your vehicle, and you will likely experience a no-start condition. Please double-check your VIN from your driver’s side door jamb or dashboard before sending it to us.
Will this fix my specific trouble codes?
This module is designed to fix issues originating from a faulty ECM, including many communication codes and internal processor faults. However, it’s crucial to ensure your vehicle’s wiring and other sensors are in good condition, as they can cause similar symptoms. A proper diagnosis is always recommended.