Is your HUMMER H3 running rough, stalling, or refusing to start? A faulty Engine Control Module (ECM) can bring your rugged SUV to a dead stop, leaving you frustrated and without a reliable vehicle. Restore the commanding performance and dependability you expect with our professionally programmed ECM, designed as a direct-fit solution for your 2009-2010 HUMMER H3. This isn’t just a replacement part; it’s the brain of your engine, meticulously prepared to get you back on the road and trail with confidence.
Common Symptoms & Your Solution
If you’re experiencing issues like a persistent Check Engine Light, poor fuel economy, engine misfires, or intermittent stalling, the ECM is a likely culprit. Diagnostic Trouble Codes (DTCs) such as P0601, P0602, P0606, or communication errors often point directly to a failing module. Our pre-programmed 2009-2010 HUMMER H3 ECM is the definitive solution. We flash the unit with the latest GM software updates using your vehicle’s specific VIN, ensuring it communicates flawlessly with your engine, transmission, and security systems right out of the box.
- ✔ Plug & Play Installation: Arrives fully programmed to your vehicle’s VIN. No expensive trips to the dealership for coding are required.
- ✔ Restored Engine Performance: Corrects issues with fuel mixture, ignition timing, and transmission shifting for a smoother, more powerful ride.
- ✔ Guaranteed Compatibility: Flashing the unit to your VIN ensures a perfect match with your H3’s specific options and anti-theft system.
- ✔ Updated GM Software: We load the newest factory calibrations from General Motors, often improving upon the original performance and efficiency.
- ✔ Broad Interchangeability: This module, service number 12625453, also replaces several other part numbers, including 12636659, 12639300, and 12628993, ensuring wide-ranging fitment.
- ✔ Peace of Mind: This unit is backed by our one-year replacement warranty.
Expert Insight: Why VIN Programming is Non-Negotiable
Many people assume you can just swap an ECM from another vehicle. On modern GM trucks like your H3, this is impossible. The ECM is tied directly to the Body Control Module (BCM) and the ignition key through the vehicle’s anti-theft system. Without the correct VIN programming, the vehicle will not start, and you’ll be left with a very expensive paperweight. Our process of flashing the module with your specific VIN before shipment is the crucial step that makes this a simple, do-it-yourself-friendly repair, saving you hundreds in dealer labor and towing fees.
Frequently Asked Questions
Do I need to have this programmed by a dealer?
No. We handle all the programming for you before the part is shipped. When you receive your 2009-2010 HUMMER H3 ECM, it is ready for installation. In most cases, it is a simple plug-and-play process.
How do I provide my VIN?
After you place your order, you will need to send us your 17-digit Vehicle Identification Number (VIN). You can typically find this on your vehicle’s registration, insurance card, or on a placard on the driver’s side dashboard visible through the windshield.
Will this fix my specific problem?
This ECM is the solution for a wide range of engine performance issues and specific diagnostic codes related to the module itself. While it is a very common failure point, we always recommend having a qualified mechanic diagnose your vehicle to confirm the ECM is the source of the problem before ordering.
What if my H3 has aftermarket modifications?
This ECM is programmed with the original factory calibration from GM for your specific VIN. It is not designed to account for significant aftermarket modifications like turbochargers, superchargers, or non-stock engine components. It is intended for vehicles with stock or near-stock setups.
Is this a used part?
This is a high-quality, tested, and verified component that has been professionally prepared for your vehicle. Each unit is inspected and programmed by our technicians to ensure it meets or exceeds OEM specifications for performance and reliability.