Restore Peak Performance to Your General Motors Vehicle
Is your Cadillac, Chevrolet, or GMC suffering from perplexing issues like a persistent check engine light, rough idling, stalling, or a complete no-start condition? These are classic signs of a failing Engine Control Module (ECM), the electronic brain of your vehicle. A faulty ECM can cripple your engine’s performance, fuel economy, and emissions control. This replacement Engine Control Module, part number 12656993, is the definitive solution to get your vehicle running reliably again.
We had a 2015 Cadillac CTS come in that was driving the owner crazy. It would randomly misfire, the transmission would shift erratically, and it threw a half-dozen unrelated communication codes. The owner had already replaced spark plugs, coils, and even a transmission sensor with no luck. After hours of chasing wires, we focused on the ECM. Once we installed a freshly programmed module, every single issue vanished. The car ran like it just rolled off the showroom floor. It’s a powerful reminder that the ECM is the central command, and when it fails, it can create chaos throughout the vehicle’s systems.
Common Symptoms of a Failing ECM
- ✔ Persistent Check Engine Light (CEL) with various trouble codes.
- ✔ Engine stalling, stumbling, or hesitating during acceleration.
- ✔ Noticeable decrease in fuel economy.
- ✔ Misfires or rough running conditions.
- ✔ Difficulty starting the engine or a complete no-start situation.
- ✔ Erratic automatic transmission shifting.
- ✔ Communication errors with other vehicle modules.
The Perfect Solution: A Pre-Programmed 2014-2016 ATS ECM
Replacing an ECM isn’t as simple as swapping the part. Modern vehicle security systems require the module to be specifically programmed to your car’s unique Vehicle Identification Number (VIN). Our service eliminates the need for an expensive trip to the dealership. When you purchase this module, we handle the complex programming for you. Simply provide us with your VIN, and we will flash the unit with the latest, most stable software updates directly from GM. This ensures seamless integration with your vehicle’s existing systems, including the ignition, fuel injectors, and emissions components.
This module is a direct-fit replacement for a wide range of GM vehicles, including the Cadillac ATS, CTS, Escalade, Chevrolet Silverado, Corvette, Camaro, and GMC Sierra, among others. It is fully compatible with original part numbers 12692067, 12676230, 12656993, 12662034, 12672537, 12673195, 12663391, 12672963, and 12669318. By ordering from us, you receive a component that is ready for installation, saving you time, money, and diagnostic headaches. Restore your vehicle’s factory performance and reliability with confidence.
Frequently Asked Questions
Do I need to do any programming after I receive this ECM?
No. We program the module to the VIN you provide before shipping. In most cases, it is a direct installation. However, some vehicles may require a simple security relearn procedure (often called a key relearn or anti-theft relearn), which can typically be done without special tools. Instructions are widely available online for this process.
How do I provide my VIN?
After you complete your purchase, you can send us a message with your 17-digit VIN. We cannot ship the module until we receive this information, as the programming is specific to your vehicle.
Is this compatible with my 2016 Silverado 1500?
Yes, this ECM is compatible with a wide range of GM trucks, cars, and SUVs from 2014-2016 and beyond. Please check the detailed fitment list in the description and ensure your original part number is listed as compatible. Providing your VIN guarantees we send you a correctly programmed part.
What if my original part number isn’t on the list?
The part numbers listed are the most common interchanges. If your number is different, please contact us with your VIN and original part number. We can verify compatibility to ensure you receive the correct component for your vehicle.
What is the warranty on this part?
This ECM comes with a standard warranty covering defects in the part itself. Please refer to our store’s warranty policy page for complete details on coverage and duration.