Restore Peak Performance to Your GM Vehicle
Is your Chevrolet Sonic, Cruze, or another compatible GM vehicle suffering from perplexing issues like a persistent check engine light, poor fuel economy, stalling, or a no-start condition? The Engine Control Module (ECM), the central computer of your vehicle, is often the root cause. This genuine GM ECM, part number 12643636, is the definitive solution to restore your vehicle’s factory performance, drivability, and reliability. We take the guesswork and dealership hassle out of the equation by professionally programming the module to your vehicle’s specific Vehicle Identification Number (VIN) before it ever leaves our facility. This ensures a seamless installation process and immediate functionality.
From the Diagnostic Bay
We recently had a 2014 Chevy Cruze towed in with a classic case of ECM failure. The customer complained of random stalling and a dashboard that lit up like a Christmas tree with warning lights. They had already spent hundreds on new sensors with no luck. A quick scan revealed a P0606 code—Internal Control Module Processor Error. This code is a definitive sign the ECM’s internal processor has failed. We ordered a pre-programmed unit like this one, keyed to the customer’s VIN. The installation took less than 30 minutes, followed by a simple 10-minute security relearn procedure. The car started immediately and ran flawlessly. This part saved the customer from more diagnostic dead-ends and got their reliable transportation back on the road.
Is Your ECM Failing? Common Symptoms
- ✔ Persistent Check Engine Light (CEL) that won’t clear or returns immediately.
- ✔ Engine stumbling, misfiring, or running rough.
- ✔ Unexplained loss of engine power and acceleration.
- ✔ A significant drop in fuel efficiency.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ The vehicle cranks but refuses to start.
- ✔ Communication errors when using a diagnostic scan tool.
Why Choose Our Programmed 2012-2016 Sonic Engine Module?
Replacing an ECM isn’t just about swapping hardware. The module must be correctly programmed to communicate with all the other systems in your specific vehicle. Our service eliminates the need for expensive dealership programming or specialized tools. We flash the module with the latest, most stable software updates directly from GM, ensuring optimal performance and correcting any known factory bugs. This 2012-2016 Sonic Engine Module is a direct-fit replacement for part number 12643636 and a wide range of other interchangeable part numbers, making it a versatile solution for many popular GM models.
Simple, Hassle-Free Process
- Order: Complete your purchase for this ECM.
- Provide VIN: Reply to our confirmation email or message us with your 17-digit VIN.
- Program & Ship: We will program the module with the latest GM software matched to your VIN and ship it directly to you.
- Install: Simply disconnect the battery, replace the old module, and reconnect the battery. In most cases, a simple security relearn procedure (instructions provided) is all that’s needed to start the vehicle.
Don’t let a faulty computer keep you off the road. This professionally programmed 2012-2016 Sonic Engine Module is the most reliable and straightforward way to solve complex electronic issues and get your vehicle running like new again.
Frequently Asked Questions
Do I need to program this ECM?
No. We handle all the programming for you before we ship the part. It will arrive ready to be installed in your vehicle. All you need to do is provide us with your vehicle’s VIN after purchase.
What is a VIN and why do you need it?
The VIN (Vehicle Identification Number) is a unique 17-digit code for your specific car. It contains information about the make, model, year, and factory-installed options. We use the VIN to load the exact correct software and calibrations from GM for your vehicle, ensuring perfect compatibility.
Is installation difficult?
For someone with basic mechanical skills, the physical installation is straightforward. It typically involves disconnecting the vehicle’s battery and then unbolting the old module and plugging in the new one. A simple key-cycle security relearn procedure may be required, which does not need any special tools.
Will this fix my car’s problem for sure?
This ECM will fix any issues directly caused by a faulty module. While the symptoms listed are very common for ECM failure, we always recommend a proper diagnosis by a qualified mechanic to confirm the ECM is the point of failure before ordering.
What other vehicles does this part fit?
This module, part number 12643636, fits a wide variety of GM vehicles, including certain years and models of the Chevy Cruze, Trax, Volt, Spark, Express van, Silverado, Suburban, Buick Encore, and GMC Savana/Sierra. Please verify your original part number or consult the detailed fitment list on this page.