Is Your GM Vehicle Plagued by Mysterious Electrical Issues?
The Engine Control Module (ECM), often called the engine computer, is the central command center for your vehicle’s engine. It meticulously manages everything from fuel injection and ignition timing to emissions systems and transmission shifting. When this critical component begins to fail, it can cause a cascade of confusing and frustrating problems, often leaving you stranded or dealing with a poorly running vehicle. Symptoms can range from a persistent Check Engine Light to a car that won’t start at all. Don’t let a faulty computer keep you off the road. This genuine, used GM ECM is the reliable and cost-effective solution you need.
The Direct-Fit Solution: A Programmed GM ECM 12669908
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We offer a genuine used GM Engine Control Module with service number 12669908. The most significant benefit is that we program the module to your vehicle’s specific Vehicle Identification Number (VIN) before it ships. This process loads the latest, most stable software calibrations directly from GM, ensuring the computer is perfectly matched to your car’s factory specifications. This crucial step saves you the time, expense, and hassle of having the unit programmed at a dealership after installation. By choosing our Programmed GM ECM 12669908, you are getting a part that is ready for the final vehicle-side security relearn procedure to get you back on the road faster.
Common Symptoms of a Failing ECM
- ✔ Persistent Check Engine Light (CEL) that won’t clear.
- ✔ Vehicle refuses to start or has difficulty starting.
- ✔ Engine stalling, stuttering, or misfiring for no apparent reason.
- ✔ Noticeable decrease in fuel economy.
- ✔ Poor engine performance, including hesitation or lack of power.
- ✔ Automatic transmission shifting erratically or harshly.
- ✔ Communication error codes (U-codes) stored in the system.
Installation and Required Relearn Procedures
Physically replacing the ECM is generally straightforward. It involves disconnecting the vehicle’s battery, unplugging the electrical connectors from the old module, unbolting it, and then installing the new one in its place. However, the most critical step follows the physical installation.
IMPORTANT: Once installed, your vehicle will NOT start until a Vehicle Theft Deterrent (VTD) relearn procedure is completed. This is a security measure that syncs the new ECM to your vehicle’s anti-theft system. This procedure requires a GM-compatible diagnostic scan tool, such as one that uses the GM TIS2Web system. This is the responsibility of the buyer or their installer. Additionally, other vehicle-specific setups may be required, such as a crankshaft position variation relearn or injector flow rate programming, to ensure optimal performance.
Verified Vehicle Compatibility for Service No. 12669908
This module is a direct fit for a wide range of General Motors vehicles. Please verify your original part has the service number 12669908. Fitment includes, but is not limited to:
- ACADIA: 2017 (2.5L), 2018 (2.5L)
- ATS: 2017 (2.0L)
- CTS: 2017 (2.0L)
- CRUZE: 2017-2018 (Gasoline)
- EQUINOX: 2018 (1.5L, 2.0L), 2019 (1.5L, ID 12669908)
- LACROSSE: 2018 (2.5L)
- MALIBU: 2017, 2018 (1.8L, 2.0L)
- REGAL: 2018 (2.0L)
- VOLT: 2017-2018 (Gasoline)
Frequently Asked Questions
What does ‘VIN-programmed’ mean?
It means we use your vehicle’s unique 17-digit VIN to load the exact, correct software and calibrations from GM for your specific engine, transmission, and options. This ensures the module works just as the original did from the factory.
Why is a security relearn required?
The security relearn, or VTD relearn, is an essential anti-theft procedure. It pairs the replacement ECM to your vehicle’s ignition keys and body control module. Without this step, the vehicle’s security system will assume a theft is in progress and will prevent the engine from starting.
Is this a new part?
No, this is a high-quality, tested, and fully functional used part that has been sourced from a salvaged vehicle. This provides a reliable and affordable alternative to a brand-new module from a dealership.
Can I install this myself?
While the physical swap is manageable for a DIY mechanic, the final, mandatory security relearn requires professional-grade diagnostic tools. We recommend installation by a qualified automotive technician who has access to GM programming systems.
What happens if I forget to provide my VIN?
We cannot ship your order without a VIN. The programming is the most critical part of our service. We will contact you after your purchase to request the VIN, but providing it during checkout will significantly speed up the processing of your order.