Restore Your Vehicle’s Performance and Reliability
Is your vehicle suffering from frustrating issues like a persistent check engine light, poor fuel economy, stalling, or a complete no-start condition? A failing Engine Control Module (ECM) is often the culprit, leaving you stranded and stressed. This genuine used GM ECM, service number 12669908, is the definitive solution to get your car, truck, or SUV running smoothly again. We take the guesswork and high dealership costs out of the equation by professionally programming this unit to your vehicle’s specific VIN before it ever leaves our facility. This ensures a streamlined installation process and restores the precise performance your vehicle was designed to deliver.
Common Symptoms & Your Solution
If you’re experiencing any of the following, a faulty ECM is the likely cause. This professionally programmed 12669908 ECM is engineered to resolve these exact problems:
- Check Engine Light (CEL) with communication-related codes (e.g., P0601, P0606)
- Unexplained drop in fuel efficiency
- Engine stalling, misfiring, or running rough
- Hesitation or stumbling during acceleration
- Transmission shifting issues or harsh shifts
- Complete failure to start the engine
Features & Benefits
- ✔ VIN-Specific Programming: We flash the module with the latest GM software using your vehicle’s VIN. This critical step ensures compatibility and saves you from expensive programming fees at a dealership.
- ✔ Cost-Effective Repair: Get a reliable, tested component from a salvaged vehicle at a fraction of the cost of a new unit, without sacrificing quality or performance.
- ✔ Restore Peak Performance: With the correct and most current calibrations, your engine’s fuel delivery, ignition timing, and emissions systems will function exactly as intended.
- ✔ Direct-Fit Replacement: This module is a direct match for service number 12669908, guaranteeing a perfect fit for a wide range of Chevrolet, GMC, Buick, and Cadillac models.
- ✔ Peace of Mind Guarantee: This unit is backed by our one-year replacement warranty.
An Expert’s Note on Installation
As a technician with over two decades of experience, I’ve seen countless DIY repairs go wrong due to improper module setup. The most critical step we handle for you is the initial programming. However, modern vehicles have sophisticated anti-theft systems. After installing this programmed 12669908 ECM, a ‘Security Relearn’ or ‘Theft Deterrent Relearn’ procedure is mandatory. This syncs the new ECM with your vehicle’s existing security components, like the ignition and body control module. While we handle the complex engine calibration, this final handshake must be done on the vehicle using a tool like GM’s TIS2WEB. It’s a standard procedure for any qualified technician and is essential for the vehicle to start and run. Acknowledging this final step ensures a smooth, successful repair from start to finish.
Frequently Asked Questions
How does the programming process work?
After you complete your purchase, you must provide us with your vehicle’s 17-digit VIN. Our technicians use this VIN to download the latest, correct software calibration directly from GM and flash it onto the ECM. This ensures the computer is a perfect match for your vehicle’s engine, transmission, and options.
What is a ‘theft relearn’ and why is it necessary?
A theft relearn is a security procedure that syncs the new ECM to your vehicle’s anti-theft system. Because the ECM is a core part of this system, the vehicle will not start until this procedure is completed after installation. This is a standard final step for this type of repair and must be performed by the end user or their mechanic.
Is this a new part?
No, this is a genuine, used OEM part that has been carefully sourced from a salvaged vehicle. Each unit is inspected and tested to ensure it is fully functional before being programmed and shipped.
Will I need to do any other procedures after installation?
In some cases, additional relearns or setup procedures may be required depending on your specific vehicle. These can include a crankshaft position variation relearn or injector flow rate programming. These are standard procedures for a professional automotive technician.
Which vehicles is this compatible with?
This programmed 12669908 ECM fits a wide variety of 2017-2019 GM vehicles, including the Chevy Volt, Equinox, Malibu, Cruze; GMC Acadia; Buick Regal, LaCrosse; and Cadillac ATS/CTS with specific engine options. Please verify the service number on your original part and check the fitment list to ensure compatibility.