Is Your GM Vehicle Running Rough?
If you’re dealing with a persistent Check Engine Light, erratic engine behavior, stalling, or a complete no-start condition, a failing Engine Control Module (ECM) is a likely culprit. The ECM is the brain of your vehicle’s engine, controlling everything from fuel mixture and ignition timing to emissions and transmission shifting. When it fails, it can cause a wide range of frustrating and difficult-to-diagnose problems. Don’t let a faulty computer keep you off the road. This direct-replacement ECM is the reliable solution to restore your vehicle’s performance and dependability.
From the Diagnostic Bay
We had a 2010 Chevy Aveo come into the shop with a complaint of intermittent stalling at stoplights. The owner had already replaced the spark plugs and an ignition coil, but the problem persisted. There were no hard fault codes, just a history of random communication errors. After hours of chasing wires, we hooked up a scope to the ECM’s main processor outputs. We saw the signal drop out unpredictably, just before the engine would stumble. We swapped in a pre-programmed ECM, performed the security relearn, and the car ran perfectly. It’s a classic case of an internal ECM failure that doesn’t always throw a clear-cut code, making it a headache for many technicians.
Common Symptoms of a Failing ECM
- ✔ Persistent Check Engine Light (CEL) that won’t clear.
- ✔ Engine stalling, stumbling, or misfiring for no apparent reason.
- ✔ Drastic decrease in fuel economy.
- ✔ Noticeable loss of engine power and acceleration.
- ✔ Vehicle won’t start, even with a good battery and starter.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Communication error codes (U-codes) stored in the system.
Why Choose Our 2009-2011 Aveo ECM?
This isn’t just a part in a box; it’s a complete solution. The biggest hurdle in replacing a modern ECM is the complex programming required to make it communicate with your specific vehicle. We eliminate that step for you. Upon purchase, you provide us with your vehicle’s 17-digit Vehicle Identification Number (VIN). Our technicians then use official GM software to flash the module with the latest updates and your vehicle’s exact configuration. This ensures that when the part arrives, it’s ready for installation, saving you a costly trip to the dealership and significant programming fees.
Simple Installation Process
Once programmed, this 2009-2011 Aveo ECM is designed for a straightforward installation. In most cases, you will only need to perform a simple security relearn procedure (often called a key relearn) after installation, which allows the ECM to recognize your vehicle’s anti-theft system. This procedure can typically be done in your driveway without any special tools. We are here to help guide you if needed.
Guaranteed Compatibility
This module is a direct replacement for a range of GM vehicles and part numbers. It is fully compatible with the following part numbers:
- 12679199
- 12642927
- 12636386
- 12621466
- 12630789
This part will fit these makes and models with these options:
- ✔ AVEO: 2009, 2010, 2011
- ✔ CRUZE: 2011, 2012 (1.8L Engine)
- ✔ SONIC: 2012 (1.8L Engine)
- ✔ SPARK: 2013
- ✔ TRAX: 2013, 2014 (1.8L Engine)
- ✔ G3: 2009, 2010
- ✔ WAVE: 2009, 2010
Frequently Asked Questions
What information do you need from me?
After you place your order, we require your 17-digit Vehicle Identification Number (VIN) to program the module specifically for your car. You can add it to the order notes or send it to us in a message.
Is this ECM difficult to install?
The physical replacement is typically straightforward, involving disconnecting the battery and swapping the module. The only additional step is a security relearn procedure, which varies by model but is generally simple to perform.
Will this fix my car’s problem for sure?
This part will correct any issues directly caused by a faulty ECM. However, it’s crucial that your vehicle has been properly diagnosed. This module will not fix problems related to other faulty sensors or wiring issues.
Do I need to send my old ECM (core) back?
No core charge or return is required for this part. You can keep or dispose of your old module.
What if my original part number is not 12679199?
Please check the list of compatible part numbers provided in the description (12642927, 12636386, etc.). As long as your original part number is on that list, this module will work for your vehicle.