Restore Your Vehicle’s Brain and Get Back on the Road
Is your Chevrolet Cruze, Sonic, or other GM vehicle acting erratically? A persistent Check Engine Light, unexplained stalling, poor fuel economy, or a complete no-start condition can often be traced back to a single, critical component: the Engine Control Module (ECM). As the central computer for your engine, the ECM is responsible for managing everything from fuel injection and ignition timing to emissions controls and transmission shifting. When it fails, the symptoms can be confusing and frustrating, leaving you stranded and facing a potentially expensive dealership repair.
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take a genuine GM Engine Control Module (Part #12643636) and professionally program it to your vehicle’s specific Vehicle Identification Number (VIN) before it ships. This crucial step ensures that the module communicates perfectly with all other systems in your car, eliminating the need for costly programming at a dealership. It arrives at your door with the latest GM software updates, ready for a straightforward installation.
From the Diagnostic Bay
We had a 2014 Chevy Cruze come into the shop with a ghost of a problem. The owner complained of intermittent stalling at red lights and a weird hesitation under acceleration, but the check engine light would only flash occasionally and then disappear. Standard diagnostics showed no hard codes. We checked the fuel pressure, spark plugs, and even looked for vacuum leaks, but everything seemed fine. After hours of chasing wires, we focused on the ECM. On a hunch, we connected a scope and saw the ECM’s 5-volt reference signal dropping out intermittently. That was the smoking gun. A standard replacement would have meant towing the car to the dealer for programming. Instead, we ordered a VIN-programmed module like this one. It arrived, we bolted it in, performed a quick security relearn, and the car ran perfectly. The customer saved hundreds on a tow and dealer labor, and we solved a problem that had stumped two other shops.
Common Symptoms of a Failing ECM
- ✔ Persistent Check Engine Light (CEL) that won’t clear or returns immediately.
- ✔ Engine misfires, stumbles, or stalls unexpectedly.
- ✔ A noticeable decrease in fuel efficiency.
- ✔ The vehicle cranks but refuses to start.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Loss of power or sluggish acceleration.
- ✔ Communication errors when using an OBD-II scan tool.
The Simple Solution: A Pre-Programmed 2012-2016 Cruze ECM
Don’t let a complex computer issue keep your car off the road. Our service simplifies the repair process. By providing us with your VIN during checkout, you receive a module that is a direct-fit, plug-and-play replacement. This 2012-2016 Cruze ECM is flashed with the most current software from General Motors, which can resolve underlying drivability issues and improve overall engine performance and efficiency. This module is a reliable and cost-effective alternative to a dealership visit, putting you back in control of your vehicle’s repair.
Wide-Ranging GM Compatibility
While this is a primary fit for the Chevrolet Cruze, this versatile Engine Control Module is also the correct component for a wide array of other GM vehicles. It directly replaces part numbers 12668866, 12668994, 12643636, 12663405, 12670335, 22819494, and 12692200. Please verify your part number and check the detailed fitment list to ensure compatibility with your specific model, which includes various years of the Sonic, Volt, Trax, Encore, Spark, ELR, and even heavy-duty trucks like the Silverado, Sierra, Express, and Savana vans.
Frequently Asked Questions
What is VIN programming and why is it required?
VIN programming loads your vehicle’s specific identification number and operational software onto the ECM. This is essential for the module to communicate correctly with your vehicle’s anti-theft system, transmission, and other electronic components. Without it, the vehicle will not start or run properly. We handle this for you before shipping.
How do I provide my VIN?
After you complete your purchase, you will need to send us your 17-digit VIN. You can typically add it as a note during checkout or send it to us in a message referencing your order number. We cannot ship the part until we receive your VIN.
Is this part difficult to install?
For someone with basic mechanical skills, the installation is straightforward. It typically involves disconnecting the vehicle’s battery, unplugging the electrical connectors from the old ECM, unbolting it, and then installing the new one in the reverse order. The location varies by vehicle but is generally accessible in the engine bay.
Will I need to do anything else after installation?
In many cases, the vehicle will start and run perfectly after installation. However, some GM vehicles may require a simple security relearn procedure (often called a ‘key cycle’) to sync the new ECM with the anti-theft system. This procedure can usually be done in your driveway and does not require special tools. Instructions are widely available online for your specific model.
How can I be sure this fits my vehicle?
The best way to ensure compatibility is to match the part number from your existing ECM to one of the numbers listed: 12668866, 12668994, 12643636, 12663405, 12670335, 22819494, or 12692200. You can also check the detailed fitment list on this page. If you are still unsure, please contact us with your VIN before ordering.