Restore Your Vehicle’s Performance and Reliability
Are you struggling with a persistent check engine light, rough idling, stalling, or poor fuel economy? These frustrating issues often point to a failing Engine Control Module (ECM), the brain of your vehicle. This fully programmed 2009-2010 Pontiac G3 ECM is the definitive, hassle-free solution to get your car back on the road, running smoothly and efficiently. We take the guesswork out of the repair by programming the unit to your specific Vehicle Identification Number (VIN) before it ever leaves our facility, ensuring a simple and effective installation.
Common Symptoms & Your Solution
A faulty ECM can cause a wide range of problems that are often misdiagnosed, leading to wasted time and money on unnecessary parts. If you’re experiencing any of the following, a failing engine computer is the likely culprit:
- Intermittent or constant Check Engine Light (CEL)
- Engine stalling or cutting out unexpectedly
- Rough or erratic idling
- Noticeable decrease in fuel mileage
- Difficulty starting the vehicle or a no-start condition
- Transmission shifting problems or harsh shifts
- Communication error codes (U-codes)
This pre-programmed module is engineered to resolve these issues by restoring the critical communication link between your engine’s sensors and its management system. By replacing your faulty unit with this reliable 2009-2010 Pontiac G3 ECM, you are addressing the root cause of the problem, not just the symptoms.
Features & Benefits
- ✔ Plug & Play Installation: This ECM arrives programmed to your vehicle’s VIN. No expensive trips to the dealership for flashing or coding are required.
- ✔ Latest GM Software: We flash each unit with the newest, most stable software updates from General Motors, ensuring optimal performance and efficiency.
- ✔ Guaranteed Compatibility: By matching the software to your VIN, we ensure this module works seamlessly with your vehicle’s specific options and systems.
- ✔ Cost-Effective Solution: Avoid high dealership prices and diagnostic fees with a direct-fit part that is ready to install right out of the box.
- ✔ Restored Performance: Regain the smooth operation, fuel efficiency, and dependability you expect from your vehicle.
- ✔ One-Year Protection: This unit is backed by our one-year replacement warranty, giving you confidence in your repair.
An Expert’s Insight on VIN Programming
“Many people don’t realize that a modern ECM is more than just a part—it’s a component that must be perfectly integrated with the vehicle’s entire electronic ecosystem. Simply swapping a used module from another car will almost always fail, triggering security lockouts, transmission errors, and ABS faults. That’s why VIN-specific programming is non-negotiable. We ensure the 2009-2010 Pontiac G3 ECM you receive is a perfect digital match for your car, allowing all systems to communicate correctly from the moment you turn the key. This is the key to a successful, lasting repair.”
Complete Fitment Information
This module is a direct replacement for part numbers 12679199, 12642927, 12636386, 12621466, and 12630789 and fits the following vehicles:
- 2011-2012 Chevrolet Cruze (with 1.8L engine)
- 2009-2011 Chevrolet Aveo
- 2013 Chevrolet Spark
- 2009-2010 Pontiac Wave
- 2013-2014 Chevrolet Trax (with 1.8L engine)
- 2012 Chevrolet Sonic (with 1.8L engine)
- 2009-2010 Pontiac G3
Frequently Asked Questions
Do I need to do any programming or flashing myself?
No. This ECM is delivered to you fully programmed and ready for installation. We handle all the flashing using your vehicle’s VIN before we ship the part, making it a true plug-and-play solution.
What information do you need from me after I order?
After you complete your purchase, you will need to provide us with your vehicle’s 17-digit VIN. We cannot ship your part until we have this information to program it correctly.
How difficult is the installation?
For most vehicles, the ECM is in an accessible location in the engine bay. Installation typically involves disconnecting the battery, unplugging the electrical connectors from the old unit, unbolting it, and then installing the new one in the reverse order. It’s a manageable job for a confident DIYer or any professional mechanic.
Will this fix my check engine light?
If the check engine light and associated codes are being caused by a faulty ECM, this part is the correct solution. It’s crucial to ensure the problem has been properly diagnosed, as other failing sensors can sometimes mimic ECM symptoms.
Where can I find my VIN?
Your VIN can be found in several places: on the driver’s side of the dashboard (visible through the windshield), on the sticker in the driver’s side door jamb, and on your vehicle’s registration and insurance documents.
My original part number isn’t 12679199. Will this still work?
Yes. This module is also a direct replacement for several other part numbers, including 12642927, 12636386, 12621466, and 12630789. As long as your vehicle model and year are on our compatibility list, this part will work perfectly once programmed to your VIN.