Is Your Chevrolet Cruze or GM Vehicle Running Poorly?
The Engine Control Module (ECM), often called the powertrain control module (PCM), is the central computer of your vehicle’s engine management system. It meticulously controls everything from fuel injection and ignition timing to emissions systems and transmission shifting. When the ECM begins to fail, it can cause a cascade of confusing and frustrating problems, often leaving you stranded or dealing with an unreliable vehicle. This genuine OEM Engine Control Module, part number 12663405, is the definitive solution to restore your vehicle’s performance, reliability, and efficiency.
The Critical Role of a Programmed Cruze Engine Control Module
Unlike a simple mechanical part, an ECM is a sophisticated computer that must be perfectly synchronized with your vehicle’s specific configuration. This includes its engine type, transmission, emissions equipment, and factory-installed options. Our service eliminates the guesswork and costly dealership visits. We flash this module with the latest official GM software updates, specifically calibrated to your vehicle’s unique Vehicle Identification Number (VIN). This ensures that when you receive the part, it’s a true plug-and-play solution, ready to integrate seamlessly with your car’s systems.
From the Diagnostic Bay
We had a 2014 Chevy Sonic come in that was driving the owner crazy. It had an intermittent misfire and would occasionally stall at stoplights, but never consistently threw a specific code. Multiple shops had replaced plugs, coils, and even an O2 sensor to no avail. After hooking up our diagnostic scope, we noticed the control signal for the #3 fuel injector was dropping out randomly. The wiring was fine, which pointed us directly to a failing driver inside the ECM. We installed a VIN-programmed module just like this one, performed a quick crankshaft position relearn, and the car ran perfectly. It’s a classic case of how a faulty ECM can mimic other component failures, making accurate diagnosis key.
Is Your GM Vehicle Showing These Signs?
- ✔️ Persistent Check Engine Light (CEL) that won’t go away.
- ✔️ Unexplained engine stalling, stumbling, or hesitation.
- ✔️ Noticeable decrease in fuel economy.
- ✔️ Rough idling or engine misfires.
- ✔️ Harsh or erratic automatic transmission shifting.
- ✔️ Failure to communicate with diagnostic scan tools.
- ✔️ Complete no-start condition where the engine cranks but won’t fire.
- ✔️ Error codes related to module communication (U-codes) or internal processor failure.
A Hassle-Free, Plug-and-Play Solution
Don’t let a faulty computer keep you off the road. By providing your VIN during the checkout process, you receive a module that is ready for installation right out of the box. This part is a direct replacement for multiple GM part numbers, including 12668866, 12668994, 12643636, 12670335, 22819494, and 12692200, ensuring broad compatibility across a wide range of vehicles like the Chevy Cruze, Sonic, Trax, Volt, and even some Silverado and Express van models. Please verify the extensive fitment list to confirm compatibility with your specific vehicle.
While this module is designed for a straightforward installation, please be aware that some vehicles may require a Crankshaft Position Sensor Relearn (also known as a CASE Relearn) to be performed with a compatible scan tool after the new ECM is installed. This is a standard procedure that synchronizes the new module with the engine’s sensors for optimal timing and misfire detection.
Frequently Asked Questions
What exactly is VIN programming?
VIN programming is the process of loading your vehicle’s specific software and calibrations onto the ECM. This ensures the module works correctly with your engine, transmission, and all factory options. It’s what makes our modules a true plug-and-play solution, saving you a trip to the dealership.
How do I provide my VIN?
After you complete your purchase, you will receive instructions on how to send us your 17-digit Vehicle Identification Number. We cannot ship your part until we receive and validate your VIN, as the programming is essential.
Will I need to do anything else after installing this ECM?
In many cases, it’s a simple plug-and-play installation. However, some GM vehicles may require a Crankshaft Position Sensor (CASE) relearn procedure using a capable scan tool to clear certain trouble codes and ensure optimal engine operation. This is a common final step for this type of repair.
Is this a brand new part?
This is a high-quality, genuine OEM part that has been thoroughly tested to ensure it meets or exceeds original factory specifications. It provides the same performance and reliability as a new unit from the dealer.
How can I be sure the ECM is my problem?
While the symptoms listed are very common for ECM failure, it’s always best to have a proper diagnosis performed by a qualified technician. This ensures you are replacing the correct part and not overlooking other potential issues like wiring or sensor faults.
Does this part fit vehicles other than the Chevy Cruze?
Yes, absolutely. This ECM is compatible with a wide range of GM vehicles, including the Sonic, Volt, Trax, Encore, Silverado, and more. Please review the detailed fitment list on this page to confirm it matches your specific year, make, and model.