Restore Peak Performance to Your Chevrolet Spark
Is your 2014-2015 Chevrolet Spark suffering from baffling electrical gremlins? Issues like a persistent check engine light, sudden stalling, poor fuel economy, or a complete no-start condition often point directly to a failing Engine Control Module (ECM). As the ‘brain’ of your vehicle, a faulty ECM can disrupt everything. This direct-fit Engine Control Module, part number 12643636, is the reliable, professional-grade solution to get your vehicle running smoothly and dependably again.
The biggest hurdle with ECM replacement has always been the expensive and time-consuming programming required at a dealership. We eliminate that problem entirely. Before we ship your part, we will program it with the latest official GM software updates, using the specific Vehicle Identification Number (VIN) from your car. This ensures that when the module arrives, it’s ready for a straightforward installation, saving you time and hundreds of dollars in dealer fees. It’s the smart, efficient fix for both seasoned mechanics and DIY enthusiasts.
A Technician’s Notebook: The Intermittent No-Start Spark
I remember a 2015 Spark that came into my bay with a frustratingly intermittent no-start problem. The owner had already replaced the battery and checked the starter. The car would run fine for days, then refuse to crank. When I connected my scan tool, I found a U0100 ‘Lost Communication with ECM/PCM’ code stored. These ‘U’ codes are notorious. They don’t point to a specific sensor, but to a communication breakdown on the vehicle’s network. After verifying the wiring and power/ground connections to the module were solid, it was clear the ECM itself was failing internally. It would randomly drop off the network, preventing the car from starting. Swapping in a pre-programmed ECM like this one resolved the issue instantly. The customer was back on the road the same day, without the long wait for a dealer appointment.
Is Your Vehicle Showing These Telltale Signs?
A failing ECM can manifest in numerous ways. If you’re experiencing any of the following, this module is likely the solution you need:
- ✔ Persistent Check Engine Light (CEL)
- ✔ Diagnostic Trouble Codes (DTCs) such as P0601, P0606, or U0100
- ✔ Vehicle refuses to start or has trouble cranking
- ✔ Unexplained drop in fuel efficiency (MPG)
- ✔ Engine stalling, sputtering, or misfiring
- ✔ Harsh or erratic automatic transmission shifting
- ✔ Apparent loss of power and acceleration
A Straightforward Guide to Installation
Replacing the ECM is a manageable job for a DIYer with basic tools. Follow these steps for a successful installation:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait 10-15 minutes for the system capacitors to discharge.
- Locate the ECM: On the Chevy Spark and many other compatible models, the ECM is typically found in the engine bay, often near the battery or firewall. It’s a silver metal box with several large electrical connectors.
- Disconnect and Remove: Carefully unclip and remove the electrical connectors. Note their orientation. Then, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed ECM into place. Reconnect the electrical connectors firmly until they click.
- Reconnect Power: Reattach the negative battery terminal and tighten it securely.
- Final Steps: The vehicle may require a security relearn procedure, which can often be completed by turning the key to the ‘ON’ position for 10-15 minutes before starting. Your vehicle is now ready to go!
Verified Vehicle Compatibility
This module is a direct replacement for part number 12643636 and other interchangeable numbers. While it’s a perfect fit for the 2014-2015 Spark, it also fits a wide range of other GM vehicles. Please verify your part number or contact us with your VIN to ensure an exact match.
SPARK 14-15 Electronic Control Module; gasoline model
Also Fits (Partial List):
BUICK ENCORE 13-16 (1.4L)
CADILLAC ELR 14-16
CHEVROLET CRUZE 12-16
CHEVROLET SONIC 12-16
CHEVROLET TRAX 13-16
CHEVROLET VOLT 11-15
CHEVY/GMC VANS (EXPRESS/SAVANA) 16 (4.8L/6.0L)
CHEVY/GMC TRUCKS (SILVERADO/SIERRA) 12-16 (6.0L)
Frequently Asked Questions
Frequently Asked Questions
Do I need to do any programming or flashing myself?
No. The main benefit of our service is that this ECM arrives at your door fully programmed to your vehicle’s VIN with the latest GM software. It’s ready for installation right out of the box.
What information do you need from me?
After you place your order, you must provide us with your vehicle’s 17-digit VIN (Vehicle Identification Number). We cannot ship the module until we have this information to program it correctly.
Where can I find my VIN?
Your VIN is located on the driver’s side of the dashboard (visible through the windshield), on the driver’s side door jamb sticker, and on your vehicle’s registration and insurance documents.
Will this fix my specific problem?
This module is a direct solution for failures within the ECM itself, which cause the symptoms listed above. It’s crucial to ensure your vehicle’s problem has been properly diagnosed. This part will not fix issues with other components like faulty sensors or bad wiring.
What if I order the wrong part?
We strongly encourage you to match the part number (12643636 or a compatible number from the list) on your original module. Providing your VIN for programming also acts as a final check to guarantee compatibility before we ship.
Are any other steps required after installation?
In some cases, a simple security or ‘key relearn’ procedure may be needed. This can typically be done without special tools by following instructions in your owner’s manual or a quick online search for your specific model.