Restore Peak Performance to Your GM Vehicle
Is your truck, van, or SUV suffering from mysterious and frustrating issues like a persistent check engine light, random stalling, poor fuel economy, or erratic shifting? These are classic signs of a failing Engine Control Module (ECM), the central computer that manages your vehicle’s most critical functions. A faulty ECM can disrupt everything from fuel injection and ignition timing to transmission operation, leaving you with an unreliable and inefficient vehicle. Don’t let a failing computer keep you off the road. This direct-fit Engine Control Module 12625455 is the definitive solution to restore your vehicle’s factory performance and reliability.
From the Diagnostic Bay
We had a 2009 Silverado 2500 come into the shop with a complaint that stumped a few other mechanics. The truck would run fine for a while, then suddenly lose power and stall at stoplights, with no consistent trouble codes. We checked the fuel pressure, ignition system, and sensors—all tested fine. After hooking up our advanced scanner and monitoring live data, we noticed the fuel trim and injector pulse width values were fluctuating wildly just before a stall. This pointed directly to the processor in the ECM. We installed a pre-programmed Engine Control Module 12625455 matched to the truck’s VIN. After a quick security relearn, the truck ran perfectly. The customer called a week later to say the stalling was gone and his fuel mileage had even improved. It’s a perfect example of how the ECM is the true brain of the operation.
Common Symptoms of a Failing ECM
If you’re experiencing any of the following issues, your ECM could be the culprit. Replacing it with this quality part can resolve these problems and prevent further damage to your engine or transmission.
- ✔ Persistent Check Engine Light (CEL) on your dashboard.
- ✔ Engine stalling, stumbling, or misfiring for no apparent reason.
- ✔ A noticeable decrease in fuel economy.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ The engine cranks but refuses to start.
- ✔ Communication errors with diagnostic scan tools.
- ✔ Failure to pass state emissions testing.
Plug-and-Play Solution with VIN Programming
The biggest challenge when replacing a modern ECM is the complex programming required to make it communicate with your specific vehicle. We eliminate that headache completely. When you purchase this module, simply provide us with your vehicle’s 17-digit VIN. Our technicians will then flash the unit with the latest GM-certified software and calibrations specific to your exact make, model, and options. This ensures that when the part arrives, it’s ready for a straightforward installation. In most cases, all that’s left is a simple security relearn procedure that can often be done without special tools, getting you back on the road faster and saving you a costly trip to the dealership.
This module is a direct replacement for part numbers 12625455 and 12629009 and fits an extensive range of GM vehicles from 2009-2010, including the Silverado, Sierra, Express, Savana, Tahoe, Yukon, Escalade, and more. Please verify the part number and consult the fitment list to ensure compatibility with your vehicle.
Frequently Asked Questions
Why do I need to provide my VIN?
Your Vehicle Identification Number (VIN) allows us to program the Engine Control Module with the exact software and calibrations for your vehicle’s engine, transmission, and factory options. This ensures seamless integration and proper function without a trip to the dealer.
Is this part difficult to install?
The physical installation is typically straightforward, involving disconnecting the battery and swapping the old module with the new one. However, a security relearn procedure (also known as a key relearn) is often required to allow the vehicle to start. Instructions for this procedure are widely available online for most GM models.
Will this ECM require any additional programming after installation?
No. The module arrives pre-programmed to your VIN. The only potential step needed is the security relearn procedure, which syncs the module with your vehicle’s anti-theft system. No expensive dealer-level programming tools are needed.
What happens if I forget to provide my VIN?
We cannot ship your order until we receive your VIN, as the programming is a critical part of the service. We will contact you via email to request the information to avoid any delays.
Does this part come with a warranty?
Yes, all of our electronic modules come with a standard warranty against defects. Please refer to our warranty policy page for complete details and duration.