Is Your Vehicle Running Rough, Stalling, or Showing a Check Engine Light?
A failing Engine Control Module (ECM), often called the engine computer, can be the source of countless frustrating and difficult-to-diagnose issues. It’s the brain of your vehicle’s engine, controlling everything from fuel mixture and ignition timing to idle speed and emissions. When it starts to fail, you’ll notice a significant decline in performance, reliability, and fuel economy. This genuine, used GM ECM, service number 12669908, is the reliable and cost-effective solution to get your vehicle running smoothly again.
We take the guesswork out of the replacement process. Unlike a generic module from a salvage yard, this ECM is professionally programmed to your vehicle’s specific Vehicle Identification Number (VIN) before it ships. This ensures compatibility and loads the latest factory software updates from GM, addressing potential issues and optimizing performance. This critical programming step is included with your purchase, saving you a costly trip to the dealership.
Common Symptoms of a Failing ECM
- ✔ Check Engine Light is on with various, often inconsistent, trouble codes.
- ✔ Engine stalling or shutting off unexpectedly while driving.
- ✔ Difficulty starting the engine or a complete no-start condition.
- ✔ Noticeable decrease in fuel economy.
- ✔ Rough idling, misfires, or hesitation during acceleration.
- ✔ Transmission shifting issues or erratic behavior.
- ✔ Communication errors with diagnostic scan tools.
Why Choose Our Programmed GM ECM 12669908?
This isn’t just a used part; it’s a complete solution. We start with a thoroughly inspected and tested OEM module sourced from a salvaged vehicle. The key difference is our in-house programming service. By providing us with your VIN, you receive a module that is ready for the final vehicle-side relearn procedures. This process ensures that the computer has the correct calibration files for your specific engine, transmission, and emissions equipment, which is vital for proper operation.
Important Installation Notice
While the physical installation of the ECM is straightforward, please be aware that additional steps are required after the module is connected. This is standard for modern vehicle computer replacement and is not a defect in the part.
A security relearn (Vehicle Theft Deterrent System) is mandatory. If this procedure is not performed, the vehicle will not start as a security precaution. This typically requires a professional-grade scan tool or access to GM’s TIS2Web programming system. Other procedures, such as a Crankshaft Variation Relearn, may also be necessary to ensure optimal performance and prevent trouble codes. It is the buyer’s responsibility to ensure these final setup procedures are completed by a qualified technician.
Verified Fitment for Service No. 12669908
This module is a direct replacement for units with service number 12669908. Please verify the number on your original ECM before ordering. It is compatible with a wide range of GM vehicles, including:
- ACADIA: 2017 (2.5L), 2018 (2.5L)
- ATS: 2017 (2.0L)
- CRUZE: 2017-2018 (Gasoline)
- CTS: 2017 (2.0L)
- 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 information do you need from me to program the ECM?
We require your 17-digit Vehicle Identification Number (VIN) to program the module with the correct software and calibrations for your specific vehicle. Please provide your VIN during or after checkout.
Is this a new part?
No, this is a genuine, used OEM part that has been sourced from a salvaged vehicle. It has been inspected and tested to be fully functional before being programmed for your vehicle.
What is a ‘theft relearn’ and why do I need to do it?
The Vehicle Theft Deterrent (VTD) system links your vehicle’s key, ignition, and computer modules. When you replace the ECM, this link is broken. A theft relearn procedure re-establishes the connection, allowing the vehicle to start. This security feature prevents theft and is a required step for all modern GM ECM replacements.
Can I install this module myself?
While the physical swap is often simple, the required post-installation procedures (like the theft relearn) require specialized diagnostic tools. We recommend professional installation by a qualified technician who has the necessary equipment to complete the job correctly.
Will this fix my check engine light?
If your check engine light and other symptoms are caused by a faulty ECM, this replacement part will resolve those issues. However, it’s crucial to have a proper diagnosis performed to confirm the ECM is the root cause before ordering.