Restore Peak Performance to Your GM Vehicle
Is your 2012-2014 Cadillac CTS, Chevy Camaro, or Buick LaCrosse suffering from perplexing issues like a persistent check engine light, rough idling, stalling, or a no-start condition? These are classic signs of a failing Engine Control Module (ECM), the central computer that governs your vehicle’s engine performance, fuel economy, and emissions. This replacement ECM, bearing part number 12652814 (interchangeable with 12651994, 12643248, and AA69), is the definitive solution to get your vehicle running smoothly and reliably again.
The Brain of Your Engine, Restored
The ECM is arguably the most critical component in a modern vehicle. It processes data from dozens of sensors to make real-time adjustments to the fuel injectors, ignition coils, and throttle body. When it fails, the entire system can become erratic. Our service simplifies the repair process. We provide a high-quality, genuine GM ECM that is professionally programmed to your vehicle’s specific Vehicle Identification Number (VIN) before it ships. This means no expensive trips to the dealership for programming—it’s ready for installation right out of the box.
Expert Pro Tip
Before installing your new ECM, always disconnect the vehicle’s battery. It’s also wise to inspect the main engine wiring harness and ground connections. A short circuit or a poor ground is a common reason for original ECM failure, and failing to correct the underlying issue can damage the new module.
Diagnosing Your 2012-2014 CTS ECM
A faulty ECM can manifest in numerous ways, often mimicking other component failures. A proper diagnosis with a professional scan tool is always recommended to read the specific Diagnostic Trouble Codes (DTCs). However, if you’re experiencing a combination of the issues below, the ECM is a primary suspect. Replacing your failing module with this pre-programmed unit is the most effective way to resolve these deep-seated electronic issues and restore the precise factory-intended operation of your engine.
Common Symptoms of a Failing ECM
- ✔ Persistent Check Engine Light (CEL) with various communication or processor-related fault codes.
- ✔ Engine stalling, stumbling, or hesitating during acceleration.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Misfires or rough running conditions that aren’t resolved by replacing spark plugs or coils.
- ✔ Complete no-start or intermittent starting problems where the engine cranks but won’t fire.
- ✔ Transmission shifting issues or erratic behavior.
- ✔ Failure of other electronic modules to communicate with the ECM.
A True Plug-and-Play Solution
Forget the hassle of coordinating with mechanics and dealerships for module programming. The process is simple: place your order, provide us with your 17-digit VIN, and we handle the rest. We flash the module with the latest, most stable software updates directly from GM, ensuring optimal performance and compatibility. This attention to detail guarantees that your new 2012-2014 CTS ECM will integrate seamlessly with your vehicle’s existing systems. While the installation is straightforward for most models, some vehicles may require a simple, key-on security relearn procedure, which can typically be done in your driveway without any special tools.
This module is a direct replacement for a wide array of popular GM vehicles from the 2012-2016 model years, including the Chevy Impala, GMC Acadia, Buick Enclave, and many more. Please verify your original part number and consult the fitment list to ensure perfect compatibility.
Frequently Asked Questions
Do I need to have this ECM programmed?
No. We handle all the programming for you before the item ships. It will arrive ready to install, flashed with the latest GM software and coded to your vehicle’s specific VIN.
What information do you need from me?
After you complete your purchase, we will need the 17-digit Vehicle Identification Number (VIN) from your vehicle. You can usually find this on your driver’s side dashboard (visible through the windshield) or on your vehicle’s registration or insurance card.
Is this a true plug-and-play installation?
For the vast majority of vehicles, yes. Once installed, the vehicle will start and run correctly. Some GM vehicles may require a simple security relearn procedure (often called a ‘key relearn’ or ‘passlock relearn’) which can be performed without special tools. Instructions are widely available online for this process.
How can I confirm this part fits my vehicle?
The best way is to check the part number on your original ECM. This unit replaces part numbers 12652814, 12651994, and 12643248. You can also use the detailed fitment list on this page or contact us with your VIN for confirmation.
Will this fix my car’s problem for good?
If the ECM has been correctly diagnosed as the faulty component, then yes, this part will resolve the related issues. It’s important to ensure there are no other problems, like a short in the wiring, that may have caused the original ECM to fail.
Does this part fit models other than the Cadillac CTS?
Absolutely. This versatile ECM is the correct module for a wide range of GM vehicles, including the Chevy Camaro, Impala, Malibu, Captiva Sport, Orlando, Equinox; Buick LaCrosse, Regal, Verano, Enclave; and GMC Acadia & Terrain. Always match your part number to be certain.