Get Your GM Diesel Back on the Road, Fast.
Is your 2006-2007 Silverado, Sierra, or Express van running rough, throwing confusing codes, or refusing to start? A failing Engine Control Module (ECM) is often the hidden culprit, leaving your reliable workhorse dead in the water. This isn’t just an inconvenience; it’s downtime that costs you time and money. We have the solution: a direct-fit, professionally programmed Programmed 12606126 ECM that gets you back in the driver’s seat with confidence.
Common Symptoms & Your Solution
A faulty ECM can mimic a wide range of other mechanical problems, leading to frustrating and expensive misdiagnoses. If you’re experiencing any of the following, your engine’s computer is the likely cause:
- Complete no-start or intermittent starting issues
- Rough idle, stalling, or poor engine performance
- Check Engine Light (CEL) with communication error codes (U-codes)
- Inaccurate or non-functioning dashboard gauges
- Transmission shifting problems or limp mode activation
- Unexplained injector or sensor fault codes that persist after replacing the parts
This unit is your definitive solution. We take a genuine GM ECM and flash it with the latest official software updates specifically for your vehicle’s VIN. This ensures perfect compatibility and restores the performance and reliability you depend on.
Features & Benefits
- ✔ Pre-Programmed to Your VIN: Your ECM arrives ready for installation, saving you a costly and time-consuming trip to the dealership for programming. Simply provide your VIN after purchase, and we handle the rest.
- ✔ Loaded with Latest GM Software: We flash the module with the most current factory updates, ensuring your engine runs at peak efficiency with optimal fuel delivery and emissions control.
- ✔ Direct-Fit Replacement: Engineered to be a perfect match for the original unit, guaranteeing a straightforward, hassle-free installation in the factory location (under the battery for trucks, in the engine compartment for vans).
- ✔ Multi-Part Number Compatibility: This single unit correctly replaces a wide range of original part numbers, including 12588335, 19260753, 12606127, and more, ensuring you get the right part the first time.
- ✔ This unit is backed by our one-year replacement warranty. This gives you confidence and protection for your investment.
Expert Insight: Don’t Chase Ghosts in the Machine
As a technician, I’ve seen countless hours and dollars wasted on replacing perfectly good injectors, FICMs, and sensors on these LLY Duramax engines. The true issue was often a failing ECM causing erratic signals and false error codes. A key indicator is when you have multiple, unrelated sensor codes appearing at once. Before you start throwing more parts at the problem, consider the brain of the operation. This Programmed 12606126 ECM is often the one-and-done fix that solves those persistent electronic gremlins for good.
Frequently Asked Questions
What information do you need to program the ECM?
After you complete your purchase, we require your vehicle’s 17-digit Vehicle Identification Number (VIN). This allows us to flash the ECM with the exact software and calibrations for your specific truck or van.
Is this a plug-and-play installation?
Yes, this ECM is programmed to your VIN to be as close to plug-and-play as possible. In some cases, a simple security relearn procedure (often called a CASE relearn or anti-theft relearn) may be required, which can be done without a trip to the dealer. Instructions for this procedure are widely available online.
Where is the ECM located on my vehicle?
For 2006-2007 Silverado and Sierra pickups, the ECM is located under the hood on the driver’s side, beneath the battery tray. For 2006-2007 Express and Savana vans, it is typically found in the LH rear of the engine compartment.
Will this fix my check engine light?
If the check engine light is caused by an internal failure of the original ECM, then yes, this part will resolve the issue. It will correct problems like processor faults, communication errors, and false sensor readings originating from the computer itself.
How do I know for sure that my ECM is bad?
While definitive diagnosis requires professional tools, common signs include a complete no-start with no communication to the scan tool, multiple unrelated error codes, or persistent issues that do not resolve after replacing the indicated sensors. If your mechanic has condemned the ECM, this Programmed 12606126 ECM is the correct replacement.