Restore Your Vehicle’s Core Performance
The Engine Control Module (ECM), often called the engine’s brain, is the single most critical component for modern vehicle operation. It meticulously manages everything from fuel mixture and ignition timing to transmission shifts and emissions controls. When your ECM begins to fail, it can trigger a cascade of confusing and frustrating problems, leaving your vehicle unreliable and performing poorly. This genuine used GM ECM, part number 12655007, is the definitive solution to get your 2014-2016 Chevrolet Impala or other compatible GM vehicle running smoothly again.
From the Diagnostic Bay
We had a 2015 Chevy Equinox come in with a persistent check engine light and a rough idle that two other shops couldn’t solve. The owner had already spent a small fortune replacing spark plugs, coils, and even an O2 sensor. Our diagnostics pointed towards inconsistent injector pulse widths, a classic sign of a failing driver circuit within the ECM. Instead of more guesswork, we installed a VIN-programmed module just like this one. The engine smoothed out instantly, the light stayed off, and the customer drove away with a car that felt new again. It’s a powerful reminder that sometimes the root cause is the computer itself, not just the parts it controls.
Is Your Vehicle Showing Signs of a Failing ECM?
A faulty engine computer can manifest in numerous ways, often mimicking other component failures. Proper diagnosis is key, but if you’re experiencing any of the following, your ECM is a likely culprit:
- ✔ Persistent Check Engine Light (CEL) with various trouble codes.
- ✔ Engine stalling, stumbling, or running rough for no apparent reason.
- ✔ A noticeable and sudden decrease in fuel economy.
- ✔ Complete no-start or intermittent starting issues where the engine cranks but won’t fire.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Communication errors with diagnostic scan tools.
The Right Solution: A Programmed 2014-2016 Impala ECM
Don’t settle for a generic, unprogrammed module that requires an expensive trip to the dealership. We take the hassle out of the repair. This part is a thoroughly tested, used ECM sourced from a salvaged vehicle. Upon purchase, we require your vehicle’s 17-digit VIN. Our technicians will then flash the module with the latest, most stable GM-certified software specific to your car’s exact build. This ensures that the computer communicates flawlessly with all other modules in your vehicle, restoring factory performance and functionality right out of the box. This is a true plug-and-play solution.
Broad GM Compatibility
While this is a primary replacement for the 2014-2016 Chevrolet Impala, this versatile ECM (service number 12655007) and its interchangeable counterparts (12653998, 12633555, 12644446) were used in a vast array of General Motors vehicles. This includes popular models like the Camaro, Malibu, Captiva, Regal, XTS, Equinox, Enclave, SRX, Acadia, and many more. Please review the detailed fitment list and verify that your vehicle and original part number are listed to ensure a perfect match.
Frequently Asked Questions
Do I need to have this ECM programmed by a dealer?
No. The main benefit of our service is that we handle all the programming for you before shipment. Using the VIN you provide, we flash the module with the correct GM software for your specific vehicle. This makes the installation process straightforward, saving you time and the high cost of dealership programming.
What information do you need from me after I order?
After you complete your purchase, you will need to provide us with your vehicle’s complete 17-digit Vehicle Identification Number (VIN). This is essential for us to load the correct software and ensure compatibility.
Is this a new part?
No, this is a genuine, used OEM part that has been sourced from a salvaged vehicle. Each unit is carefully inspected and tested to ensure it is fully functional before being programmed and shipped.
Will this part require any additional relearn procedures?
In many cases, this is a plug-and-play installation. However, some vehicles may require a security relearn procedure (often called a Passlock or anti-theft relearn) after installation, which can typically be done without special tools. Instructions for this are widely available online for your specific model.
My original part number is 12653998. Will this part work?
Yes. This listing for part number 12655007 is a direct, interchangeable replacement for several other part numbers, including 12653998, 12633555, and 12644446. As long as your original module’s part number is on our list, this unit will be a correct replacement.