Get Your Duramax Back on the Job, Fast.
A failing Engine Control Module (ECM) in your Silverado, Sierra, Express, or Savana isn’t just an inconvenience—it’s downtime that costs you money and peace of mind. When your workhorse is sidelined with starting issues, erratic behavior, or a persistent check engine light, you need a reliable solution that gets you back to work without delay. This is the definitive, direct-fit replacement for your 2006-2007 GM Duramax LLY diesel, a pre-programmed brain for your engine that restores the performance and dependability you count on.
Common Symptoms of a Failing Duramax ECM & Your Solution
If your truck or van is experiencing any of the following, a faulty computer is the likely culprit. This unit is the solution for issues such as:
- Complete no-start or intermittent starting problems
- Rough or unstable idle
- Poor fuel economy and loss of power
- Check Engine Light (CEL) with communication-related DTCs (e.g., P0601, P0606)
- Transmission shifting problems or incorrect gear indication
- Scan tool cannot communicate with the engine computer
Instead of paying for expensive diagnostics and programming fees at a dealership, this Programmed 12606126 ECM arrives at your door ready for installation. We take care of the complex part so you can get back on the road.
Features & Benefits
- ✔ VIN-Specific Programming: We flash the unit with your vehicle’s exact VIN and the latest GM-released software, ensuring perfect compatibility with your engine, transmission, and options.
- ✔ Plug-and-Play Installation: Simply install the module and perform a straightforward security relearn procedure. No dealer visit required.
- ✔ Restored Performance: Corrects running issues, restores proper fuel delivery, and ensures smooth engine operation, getting your truck back to peak condition.
- ✔ Guaranteed Fitment: This unit is a direct replacement for multiple part numbers, including 19260753, 12588335, 12606126, 12606127, 12603623, and YNAY.
- ✔ Peace of Mind: This unit is backed by our one-year replacement warranty.
Expert Insight: Why VIN Programming is Non-Negotiable
On modern diesel trucks like your Duramax, the ECM is more than just an engine controller; it’s the central command center. It constantly communicates with the transmission, anti-lock brakes, instrument cluster, and the vehicle’s anti-theft system (VATS/Passlock). A generic, non-programmed module simply won’t work—the truck won’t start, or it will run in a severely limited ‘limp mode.’ Our VIN-programming service ensures all these critical systems recognize the new module, creating a seamless integration that functions exactly as the factory intended. This is the crucial step that makes our Programmed 12606126 ECM a true, effective solution.
Don’t let a faulty computer dictate your schedule. Take control with a reliable, professionally prepared Programmed 12606126 ECM and put your trusted GM truck or van back in service.
Frequently Asked Questions
Do I need to do any programming after I install it?
No programming is needed. We handle that for you. However, you will need to perform a simple security relearn procedure, which can typically be done without any special tools and takes about 30 minutes. We can provide instructions for this process.
How do I provide my VIN number?
After you complete your purchase, simply send us a message with your 17-digit Vehicle Identification Number (VIN). We cannot ship your part until we receive this information, as it is essential for the programming process.
Will this fix my check engine light?
This ECM will resolve any check engine light and diagnostic trouble codes (DTCs) that are directly caused by a failing engine computer. It is crucial to ensure your vehicle’s issue has been properly diagnosed, as this part will not fix problems related to other faulty sensors or mechanical components.
Is this a brand new part?
This is a high-quality, fully tested and verified replacement part. Each unit undergoes rigorous inspection and programming to ensure it meets or exceeds original equipment performance and reliability standards.
What vehicles does part number 12606126 fit?
This ECM fits 2006-2007 Chevrolet Silverado 2500/3500, GMC Sierra 2500/3500, Chevrolet Express 2500/3500, and GMC Savana 2500/3500 vans equipped with the LLY Duramax diesel engine (8th VIN digit ‘2’).
What is the warranty on this ECM?
This unit is backed by our one-year replacement warranty, giving you confidence in your repair.