Is Your GM Vehicle Running Rough, Stalling, or Refusing to Start?
If you’re dealing with a persistent check engine light, erratic engine behavior, poor fuel economy, or a no-start condition, the Engine Control Module (ECM) is often the culprit. As the ‘brain’ of your vehicle, a failing ECM can cause a cascade of frustrating and hard-to-diagnose issues. In my 20+ years of diagnostic work, I’ve seen countless customers replace perfectly good sensors and parts, only to find the core problem was the ECM itself. This module is the central command for everything from fuel injection and ignition timing to transmission shifting.
The Smart, Cost-Effective Solution: A VIN-Programmed ECM
Forget the exorbitant cost and hassle of a new module from the dealership. We offer a reliable, fully tested used ECM that is professionally programmed to your specific vehicle before it ever leaves our facility. This isn’t just a generic part; it’s a component prepared specifically for your car.
- โ VIN-Specific Programming: Simply provide your Vehicle Identification Number (VIN) at checkout, and we’ll flash this ECM with the latest official GM software calibrations for your exact make, model, and year.
- โ Solves Common Failures: Directly addresses issues like random stalling, communication error codes (U-codes), false sensor readings, and complete engine shutdown.
- โ Cost-Effective Repair: Get the functionality of a new part without the dealership price tag. This unit is sourced from a salvaged vehicle and rigorously tested for performance.
- โ Broad Compatibility: This ECM, service number 12669908, is a direct-fit for a wide range of popular GM vehicles.
Expert Pro Tip: Understanding the “Theft Relearn”
A common question I get in the shop is, “Why does my car need a theft relearn after I install the new ECM?” Think of it like this: your car’s security system (immobilizer), ignition key, and ECM are all part of a secure network. When you introduce a new ECM, the other components don’t recognize it. The Vehicle Theft Deterrent (VTD) relearn procedure, done with a tool like GM’s TIS2WEB, is essentially a digital handshake that introduces the new ECM to the system, authorizing it to start the engine. It’s a standard, required security step for most modern vehicle computer replacements.
Easy Installation Guide for Your 2017-2019 Cruze ECM
Replacing the ECM is a straightforward job for a confident DIYer or any professional technician. Following these steps ensures a smooth process.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait at least 10 minutes for the system capacitors to discharge.
- Locate the ECM: On most compatible models (like the Cruze, Equinox, and Malibu), the ECM is found in the engine compartment, typically on the driver’s side (LH). It will be a metal box with several large electrical connectors.
- Disconnect and Remove: Carefully unplug the electrical harnesses. These connectors have locking tabs that need to be released. Once disconnected, unbolt the module from its mounting bracket and remove the old unit.
- Install the New Module: Seat your new, pre-programmed ECM into the mounting bracket and secure the bolts. Re-connect the electrical harnesses, ensuring they click securely into place.
- Reconnect Battery: Reattach the negative battery terminal.
- Perform Final Procedures: The final, critical step is to perform any necessary relearn procedures as outlined below.
Important: Post-Installation Requirements
As this ECM has been programmed to your VIN, the final step is to sync it with your vehicle’s onboard security and sensor systems. This is the responsibility of the installer. Your vehicle may not start until these are completed.
- Vehicle Theft Deterrent (VTD) Relearn: This is mandatory. It must be performed using a professional scan tool with GM programming capabilities (like TIS2WEB).
- Other Potential Relearns: Depending on your specific vehicle, you may also need to perform a Crankshaft Position Variation Relearn, Throttle Body Relearn, or Injector Flow Rate programming. A qualified technician will be able to identify and complete these procedures.
Guaranteed Fitment for Service Number 12669908
This module is a confirmed fit for the following vehicles and options. Please verify your original part has the service number 12669908 to ensure compatibility.
- Acadia: 2017 (2.5L, VIN Z), 2018 (2.5L)
- ATS: 2017 (2.0L)
- Cruze: 2017-2018 (Gasoline)
- CTS: 2017 (2.0L)
- Equinox: 2018 (1.5L or 2.0L), 2019 (1.5L, ID 12669908)
- LaCrosse: 2018 (2.5L)
- Malibu: 2017, 2018 (1.8L or 2.0L)
- Regal: 2018 (2.0L)
- Volt: 2017-2018 (Gasoline, ID 12669908)