Restore Peak Performance to Your GM Truck or SUV
Is your 2009-2010 Silverado 2500, Sierra, or other compatible GM vehicle suffering from frustrating and unpredictable engine problems? A faulty Engine Control Module (ECM) is often the culprit behind issues like a persistent check engine light, poor fuel economy, rough idling, or even a no-start condition. This direct-fit ECM, part number 12629009, is the definitive solution to get your vehicle running reliably again. It serves as the brain of your engine, precisely managing fuel injection, ignition timing, and emissions systems to ensure optimal power and efficiency.
From the Diagnostic Bay
We had a 2009 Sierra 2500 with the 6.0L LY6 engine come into the shop with a bizarre, intermittent stalling issue. It would run perfectly for days, then suddenly die at a stoplight with no warning and no codes stored. After hours of chasing wires and testing sensors, we hooked up a scope to the injector driver circuits inside the original ECM. We found that the driver for cylinder 3 was occasionally dropping out when the module got hot. A replacement ECM, programmed to the truck’s VIN, solved the problem instantly. It’s a classic example of how an internal ECM fault can create symptoms that are nearly impossible to trace without replacing the unit.
Is Your Vehicle Showing Signs of ECM Failure?
- ✔ Check Engine Light: An illuminated or flashing Check Engine Light (CEL) is one of the most common indicators, often with codes related to module communication or sensor circuits.
- ✔ Engine Stalling or Misfiring: The engine may stall unexpectedly, run rough, or misfire as the ECM fails to properly control spark and fuel.
- ✔ No-Start Condition: A completely failed ECM can prevent the engine from starting at all by cutting off signals to the fuel pump or ignition system.
- ✔ Poor Fuel Economy: If the module isn’t calculating the air-fuel mixture correctly, you’ll notice a significant drop in your MPG.
- ✔ Reduced Power and Performance: Your truck may feel sluggish or unresponsive due to incorrect timing and fuel delivery commands from a faulty ECM.
- ✔ Communication Errors: Your mechanic’s scan tool may be unable to communicate with the engine computer, pointing directly to a module failure.
The Plug-and-Play Solution: A Pre-Programmed 2009-2010 Silverado 2500 ECM
Don’t waste time and money at the dealership. We simplify the repair process by programming this module specifically for your vehicle before it ships. When you place your order, simply provide us with your vehicle’s 17-digit VIN. Our technicians will flash the unit with the latest, most stable GM-certified software for your exact make and model. This ensures that all factory parameters are perfectly matched to your engine, transmission, and options package. While the programming is done for you, please note that an industry-standard security relearn procedure (also known as an anti-theft relearn) may be required after installation. This procedure pairs the new module to your vehicle’s keys and can often be performed without special tools.
This high-quality replacement for the 2009-2010 Silverado 2500 ECM is built to meet or exceed original equipment specifications. It is also a direct replacement for part number 12625455 and fits a wide array of GM vehicles, including the Escalade, Suburban, Tahoe, Express Van, Hummer H2, and more. Restore your vehicle’s drivability and confidence with a reliable, correctly programmed engine computer.
Frequently Asked Questions
Do I need to have this ECM programmed?
No. This ECM comes pre-programmed to your vehicle’s specific VIN. You must provide your VIN at checkout so we can flash the module with the correct GM software and calibrations before shipping.
What tools are needed for installation?
Installation typically requires basic hand tools like a socket set to remove and replace the module. After installation, a security relearn procedure is often necessary. This can sometimes be done with a specific sequence of key turns, but a professional scan tool may be required in some cases.
How do I find my vehicle’s VIN?
Your 17-digit Vehicle Identification Number (VIN) can be found on your vehicle’s registration, insurance card, or on a placard on the driver’s side dashboard visible through the windshield.
Will this fix my check engine light?
If the check engine light and associated codes are caused by a faulty ECM, this part will resolve the issue. However, it is crucial to have your vehicle properly diagnosed to ensure the problem isn’t with a sensor, wiring, or another component.
Is this part compatible with other GM vehicles?
Yes, this ECM is compatible with a wide range of 2009-2010 GM trucks, vans, and SUVs that use part numbers 12629009 or 12625455. Please review the detailed fitment list on this page to confirm compatibility with your specific model and engine.