Get Your H3 Back in Action, Fast.
Is your 2009-2010 Hummer H3 giving you headaches? A faulty Engine Control Module (ECM) can bring your rugged SUV to a complete halt, leaving you stranded and frustrated. Symptoms like a no-start condition, erratic idling, stalling, or a persistent check engine light point directly to a failing engine computer. Instead of dealing with the high costs and long waits at a dealership, get the reliable, plug-and-play solution that gets you back on the road and trail with confidence.
Common Symptoms & Your Direct-Fit Solution
If you’re experiencing any of the following issues, a failing ECM is the likely culprit. This unit is the definitive solution for:
- Complete no-start or intermittent starting problems
- Engine stalling or shutting off while driving
- Poor fuel economy and reduced engine power
- Harsh or incorrect transmission shifting
- Check Engine Light with communication-related Diagnostic Trouble Codes (DTCs) like P0601, P0602, P0606
- Issues with anti-theft systems preventing the engine from starting
This is not just a replacement part; it’s a complete, ready-to-install solution. We handle the complex programming, so you can handle the simple installation. By purchasing this 2009-2010 Hummer H3 engine control module, you are choosing a straightforward path to restoring your vehicle’s performance.
Features & Benefits
- ✔ Plug-and-Play Installation: This ECM arrives pre-programmed to your vehicle’s specific VIN. No extra trips to the dealer for expensive flashing are required.
- ✔ Updated GM Software: We flash the module with the latest factory updates from General Motors, ensuring optimal performance, fuel efficiency, and emissions control.
- ✔ Guaranteed Compatibility: By using your VIN, we ensure this computer is a perfect match for your vehicle’s options and systems. It is a direct replacement for service numbers 12636659, 12639300, 12628993, and more.
- ✔ Solves Running Issues: Corrects common problems caused by a faulty original computer, restoring the smooth and reliable operation you expect from your Hummer.
- ✔ Cost-Effective Solution: Avoid the high labor rates and inflated parts costs of a dealership service center with this direct-to-you solution.
- ✔ Peace of Mind: This unit is backed by our one-year replacement warranty.
An Expert’s Note on VIN Programming
“In modern vehicles like your H3, the ECM is the central command center. It doesn’t just manage the engine; it communicates with the transmission, the anti-theft system (VATS/Passlock), the instrument cluster, and more. Simply swapping a used computer from another vehicle won’t work—it will trigger the security system and the vehicle won’t start. Our VIN programming service is not just a convenience, it’s a necessity. We configure the module to recognize your specific vehicle’s keys and components, making the installation process as simple as swapping the part and turning the key.”
Don’t let a bad computer keep your capable H3 parked. This professionally programmed 2009-2010 Hummer H3 engine control module is the most reliable and efficient way to solve complex electronic issues and restore your vehicle to its factory-spec performance. Provide your VIN at checkout and let our experts handle the rest.
Frequently Asked Questions
What is VIN programming and why do I need it?
VIN programming is the process of loading your vehicle’s unique 17-digit Vehicle Identification Number and its specific software configuration onto the engine control module. This is critical for ensuring the ECM communicates correctly with your vehicle’s other systems, including the anti-theft system, transmission, and gauges. Without it, the vehicle will not start or run properly.
Is any additional programming required after I install it?
No. This 2009-2010 Hummer H3 engine control module arrives ready for a plug-and-play installation. In some rare cases, a security relearn procedure may be necessary, which is a simple process you can do yourself in about 10-15 minutes without any special tools. We include instructions for this procedure.
How do I provide my VIN?
You can enter your vehicle’s VIN in the designated field during the checkout process. Please double-check it for accuracy, as this is crucial for correct programming.
Will this fix my check engine light?
If the check engine light is on due to an internal failure of the original ECM (e.g., codes like P0601 or P0606), this replacement unit will resolve the issue. However, if the light is on for another reason, such as a faulty sensor, that separate issue will still need to be addressed.
What if my original part number isn’t 12678512?
This ECM is a direct replacement for a wide range of GM service numbers, including 12636659, 12639300, 12628993, and others listed in the description. As long as your vehicle is listed in the compatibility chart, we will program the module to function perfectly for your application, regardless of the original service number.