Restore Peak Performance to Your GM Vehicle
Is your vehicle suffering from a persistent Check Engine Light, erratic engine behavior, stalling, or a complete no-start condition? These are classic signs of a failing Engine Control Module (ECM), the central computer that manages your engine’s performance, fuel economy, and emissions. A faulty ECM can be frustrating and difficult to diagnose, often leading to unnecessary replacement of other components. This genuine used GM ECM, service number 12669908, is the definitive solution to restore your vehicle’s factory operation and reliability.
Unlike a standard replacement part that requires expensive dealer programming, this module arrives at your door pre-programmed to your specific vehicle. We use your Vehicle Identification Number (VIN) to load the latest, most stable software and calibrations directly from GM. This plug-and-play approach simplifies the repair process, saving you significant time and money compared to a dealership visit. Get your vehicle back on the road quickly with a reliable, VIN-matched engine computer.
We had a 2018 Chevy Equinox come in with a strange, intermittent stalling problem. The owner had already replaced the spark plugs, ignition coils, and even the fuel pump based on advice from various forums. The codes were all over the place—misfires, communication errors, O2 sensor faults. After hours of chasing our tails with a multimeter and scope, we decided to monitor the ECM’s internal voltage and temperature data streams. We found that the processor was dropping out whenever the engine bay reached a certain temperature. We swapped in a VIN-matched Programmed ECM 12669908, performed the security relearn, and the Equinox ran perfectly. It’s a classic case where the ‘brain’ itself was the problem, not the parts it was controlling.
Is Your ECM Failing? Common Symptoms
A failing engine computer can manifest in numerous ways. If you’re experiencing any of the following, a faulty ECM could be the culprit:
- ✔ Persistent Check Engine Light (CEL) that won’t clear
- ✔ Engine stalling or shutting off while driving
- ✔ Complete no-start or hard-starting condition
- ✔ Noticeable decrease in fuel efficiency
- ✔ Rough idling or engine misfires
- ✔ Poor acceleration and overall lack of power
- ✔ Communication error codes with diagnostic scan tools
- ✔ Erratic automatic transmission shifting
The Superior Solution: A Programmed ECM 12669908
Choosing our Programmed ECM 12669908 offers a streamlined and cost-effective repair. Each unit is a thoroughly inspected, used component sourced from a salvaged vehicle, ensuring OEM quality and fitment. The critical difference is our in-house programming service. By providing your VIN during checkout, you receive a module that is a direct electronic match for your vehicle’s specific configuration, including engine type, transmission, and factory options. This eliminates compatibility issues and ensures all related vehicle systems function as intended post-installation.
Important Installation Information
Please be aware that while the core engine software is programmed, modern vehicles have sophisticated anti-theft systems. Upon installing this ECM, you or your mechanic will need to perform a Vehicle Theft Deterrent (VTD) relearn. This procedure syncs the new ECM with your vehicle’s security system and is required for the engine to start. This is typically done with a professional-grade scan tool or GM’s TIS2Web software.
Additionally, depending on your specific vehicle, other minor procedures may be necessary, such as a Crankshaft Position Variation Relearn or setting injector flow rates. These are standard procedures after an ECM replacement and are the responsibility of the installer.
Extensive Vehicle Compatibility
This ECM with service number 12669908 fits a wide range of popular GM models. Please verify your original part number matches before ordering. This part is a direct replacement for:
- 2018-2019 Buick LaCrosse (2.5L)
- 2018 Buick Regal (2.0L)
- 2017 Cadillac ATS (2.0L)
- 2017 Cadillac CTS (2.0L)
- 2017-2018 Chevrolet Cruze (Gasoline)
- 2018-2019 Chevrolet Equinox (1.5L, 2.0L)
- 2017-2018 Chevrolet Malibu (1.8L, 2.0L)
- 2017-2018 Chevrolet Volt (Gasoline)
- 2017-2018 GMC Acadia (2.5L)
Frequently Asked Questions
Why do you need my VIN?
Your VIN (Vehicle Identification Number) is essential for us to load the exact GM-specified software and calibrations for your car’s engine, transmission, and options. This ensures perfect compatibility and performance, saving you a trip to the dealership.
Is this a new part?
No, this is a genuine, used OEM part recovered from a salvaged vehicle. Each unit is inspected and tested to be fully functional before being programmed and shipped.
What is a ‘theft deterrent relearn’ and can I do it myself?
It’s a security procedure that allows the new ECM to communicate with your vehicle’s ignition and other modules. Without it, the car will not start. While some simple key-cycling procedures exist for older cars, vehicles compatible with this ECM typically require a professional scan tool or access to GM’s software (TIS2Web) to complete the relearn.
Will this ECM fix my car’s problem for sure?
This part is a direct replacement for a faulty ECM with service number 12669908. If your vehicle has been correctly diagnosed with a failed ECM, this will solve the issue. However, it will not fix problems caused by other faulty components like sensors or wiring. Proper diagnosis is key.
What tools are needed for installation?
Physical installation typically only requires basic hand tools like a socket set to disconnect the battery and unbolt the module. However, the mandatory post-installation procedures, like the security relearn, require specialized diagnostic equipment.