Restore Peak Performance to Your Vehicle
Is your 2012 Chevrolet Impala, or another compatible GM vehicle, suffering from perplexing issues like a persistent check engine light, poor fuel economy, stalling, or a no-start condition? These are classic signs of a failing Engine Control Module (ECM). As the central computer for your engine, the ECM is responsible for managing everything from fuel mixture and ignition timing to transmission shifts and emissions control. When it falters, the entire vehicle’s performance and reliability are compromised.
This replacement Engine Control Module, part number 12616889, is the definitive solution to get your vehicle running smoothly again. We take the guesswork and hassle out of the repair process. Unlike a generic module from a parts store or salvage yard, this unit is professionally programmed specifically for your car using your unique Vehicle Identification Number (VIN). This critical step ensures that the module communicates perfectly with all other systems in your vehicle, just as the original did from the factory. We flash it with the latest, most stable software updates available from General Motors, which often correct underlying drivability issues you may not have even known were software-related.
From the Diagnostic Bay
We had a 2012 Cadillac CTS come in that was a real head-scratcher. The owner had replaced the spark plugs, coils, and even the fuel pump, but it still had a random, intermittent misfire and would occasionally refuse to start after being driven. No consistent codes were being stored, just a generic P0300 (Random/Multiple Cylinder Misfire). After hours of chasing wires and checking sensors, we finally hooked up our scope to the injector drivers at the ECM. We found that the signal for cylinder 3 would drop out unpredictably. The internal driver in the original ECM was failing under heat. We installed one of our pre-programmed modules matched to the car’s VIN, performed the security relearn, and the car ran perfectly. It’s a great reminder that sometimes the problem lies with the brain, not the body.
Is a Failing 2012 Impala Engine Module Causing Your Problems?
A faulty ECM can manifest in numerous ways, often mimicking other component failures. Before you spend hundreds on parts you don’t need, compare your vehicle’s behavior to this list of common symptoms. If you’re experiencing several of these, there’s a high probability your ECM is the culprit.
- ✔ Unexplained Check Engine Light (CEL) illumination
- ✔ Drastic decrease in fuel efficiency
- ✔ Engine misfires, stumbling, or hesitation during acceleration
- ✔ Rough or erratic idling
- ✔ Vehicle stalls unexpectedly while driving or at a stop
- ✔ Engine cranks but will not start
- ✔ Automatic transmission shifting issues or harsh shifts
- ✔ Communication errors with diagnostic scan tools
A Simple, Reliable Solution
Don’t let a complex computer problem keep you off the road. Our process is designed to be straightforward. After you place your order, simply provide us with your vehicle’s VIN. Our technicians will then select the correct hardware and flash it with the precise GM-certified software for your car’s specific configuration. The module arrives at your door ready for installation. Once installed, a simple security relearn procedure (often called a key relearn or anti-theft relearn) is typically all that’s needed to synchronize the new ECM with your vehicle’s anti-theft system. This can often be done without special tools and instructions are widely available.
This module is a direct replacement for a wide range of GM vehicles and interchanges with the following part numbers: 12616889, 12630908, 12637106, 12642665, 12650256, and 12651993. Please verify your part number and check the extensive fitment list to ensure compatibility.
Frequently Asked Questions
What is an ECM and why does it need programming?
The Engine Control Module (ECM) is your car’s main computer, controlling engine functions. Programming, or ‘flashing’, installs vehicle-specific software using your VIN. This ensures the ECM works correctly with your car’s engine, transmission, and options, preventing performance issues and error codes.
Is this part truly plug-and-play?
Because we program the module to your VIN before shipping, it is nearly plug-and-play. The only additional step required after installation is a security relearn procedure. This synchronizes the new ECM with your car’s anti-theft system and keys. This procedure can typically be done without special tools.
How do I provide my VIN after purchase?
After completing your purchase, you can send us a message with your 17-digit Vehicle Identification Number (VIN). We cannot program and ship your module without it. You can find your VIN on your vehicle’s dashboard (driver’s side), the driver’s side door jamb sticker, or on your insurance/registration documents.
Will this ECM fit vehicles other than the 2012 Impala?
Yes. This ECM is compatible with a wide variety of GM vehicles, including models of the Cadillac CTS, SRX, Chevrolet Camaro, Captiva Sport, Equinox, Buick Allure, LaCrosse, Regal, and more. Please check the detailed fitment list on this page and match your original part number to ensure it is correct for your specific vehicle.
Do I need to send my old ECM (core) back?
No core charge or return is required for this part. You can keep your old module or dispose of it responsibly.