Restore Your Vehicle’s Brainpower and Performance
The Engine Control Module (ECM), often called the engine’s brain, is the central command center for your vehicle’s performance, fuel economy, and emissions. When it begins to fail in your 2014-2016 Cadillac ATS or other compatible GM vehicle, you’ll notice a range of frustrating and often debilitating symptoms. From a persistent check engine light to stalling and no-start conditions, a faulty ECM can bring your daily drive to a halt. This genuine GM Engine Control Module, part number 12663391, is the definitive solution to restore your vehicle’s factory performance and reliability.
Unlike a standard replacement part that requires a trip to the dealership for expensive programming, this module arrives at your door ready for installation. We take your vehicle’s unique Vehicle Identification Number (VIN) and program the module with the latest, most stable software updates directly from GM. This ensures perfect compatibility and communication with all other systems in your vehicle, making the installation process as straightforward as possible.
From the Diagnostic Bay
We had a 2015 Cadillac CTS come in with a problem that was driving the owner crazy. The car would run perfectly for days, then suddenly stall at a red light and refuse to restart for 10-15 minutes. There were no consistent trouble codes, just a few random communication errors. After hours of checking wiring and sensors, we hooked up a data logger to the ECM. We discovered that as the module’s internal temperature rose during normal operation, its processor would intermittently fail, causing the shutdown. We replaced it with one of our VIN-programmed modules, and the customer called a week later to say his car had never run better. It’s often these hidden electronic failures that cause the most elusive problems.
Solving Problems with the 2014-2016 ATS Engine Module
A failing ECM doesn’t just impact one system; it creates a ripple effect across your vehicle’s entire electronic network. The key function of this module is to interpret data from dozens of sensors—like oxygen sensors, camshaft position sensors, and throttle position sensors—and make instantaneous adjustments to the fuel injection, spark timing, and transmission shifting. When the module’s calculations are off, or it fails to communicate, your vehicle’s performance suffers dramatically. Installing our pre-programmed 2014-2016 ATS Engine Module is the most effective way to correct these complex issues and ensure all engine parameters are operating exactly as the manufacturer intended.
Common Symptoms of a Failing ECM
- ✔ Check Engine Light: The most common indicator, often with codes related to module communication or sensor circuits.
- ✔ Engine Stalling or Misfiring: The ECM may fail to command the correct spark or fuel, leading to rough running, stumbling, or stalling.
- ✔ Poor Fuel Economy: Incorrect fuel mixture calculations can cause the engine to run too rich, wasting fuel.
- ✔ No-Start Condition: The module may fail to activate the fuel pump or ignition coils, preventing the engine from starting at all.
- ✔ Erratic Transmission Shifting: The ECM works with the Transmission Control Module (TCM) to ensure smooth shifts. A faulty ECM can cause harsh or delayed shifting.
- ✔ Failure to Communicate: A diagnostic scan tool may be unable to connect with the ECM, making diagnosis impossible.
This module is a direct-fit replacement for a wide range of General Motors vehicles, including the Cadillac Escalade, Chevrolet Corvette, Silverado 1500, GMC Sierra 1500, and more. By providing your VIN, you guarantee that the 2014-2016 ATS Engine Module you receive is perfectly matched to your vehicle’s specific options and systems.
Frequently Asked Questions
Is this module truly plug-and-play?
Yes. Because we program the module to your specific VIN before shipping, it will integrate with your vehicle’s existing systems. In most cases, this eliminates the need for any additional programming. However, some vehicles may require a simple security or anti-theft relearn procedure, which can typically be done without special tools. Instructions are available for this process.
Where do I provide my VIN?
After you complete your purchase, you will receive instructions on how to send us your 17-digit VIN. We cannot ship your part until we receive and validate your VIN, as the programming is essential for the part to function correctly.
What happens if I install it without programming?
The module will not work. The vehicle’s security system will prevent it from starting, and it will not have the correct software for your engine, transmission, and emissions equipment. Our VIN programming service is a mandatory and crucial step.
Does this part require a core return?
This listing does not require a core return. You can keep your old module. However, please be sure to recycle it responsibly at an appropriate electronics or automotive parts recycling facility.
Which part number will I receive?
This module is compatible with multiple GM part numbers, including 12692067, 12676230, 12656993, and others listed in the description. You will receive a fully compatible module that supersedes or directly replaces your original part number, loaded with the correct software for your VIN.