Get Your Hummer Back in Command
Is your 2010 Hummer H3 running rough, throwing confusing error codes, or failing to start altogether? A faulty Engine Control Module (ECM) can sideline even the most capable vehicle, leaving you frustrated and without your ride. This pre-programmed ECM, part number 12678513, is the definitive solution to restore your H3’s engine performance and get you back on the road with confidence. We take the guesswork out of the repair by flashing the module to your vehicle’s specific VIN before it ever leaves our facility.
Common Symptoms & Your Solution
A failing ECM can manifest in numerous ways, often mimicking other sensor failures. If you’re experiencing any of the following, a faulty engine computer is a likely culprit:
- Persistent Check Engine Light (CEL)
- Engine stalling or misfiring unpredictably
- Noticeable decrease in fuel economy
- Transmission shifting issues or harshness
- Vehicle won’t start, but the battery and starter are good
- Diagnostic trouble codes (DTCs) such as P0601, P0602, P0606, or other communication errors.
This isn’t just a replacement part; it’s a direct solution. By providing us with your VIN upon purchase, we ensure this 2010 Hummer H3 ECM 12678513 arrives with the most current GM software specifically for your vehicle. This eliminates compatibility issues and ensures all systems communicate as the factory intended.
Features & Benefits
- âś” VIN-Programmed for Your H3: We flash this module with your vehicle’s specific VIN, ensuring seamless integration and correct operation right out of the box.
- âś” Latest GM Software: Your ECM arrives with the most current GM updates, which can correct factory bugs and improve overall engine and transmission performance.
- âś” Solves Common Failure Points: Engineered to address typical ECM issues, this unit is your reliable fix for persistent check engine lights, poor running conditions, and communication errors.
- âś” Broad Compatibility: This module (service no. 12678513) also replaces 12633264 and fits a range of powerful GM vehicles, ensuring a proven, quality component.
- âś” One-Year Replacement Warranty: This unit is backed by our one-year replacement warranty, giving you peace of mind with your purchase.
A Technician’s Insight: After two decades of diagnosing driveability issues, I’ve seen countless problems caused by generic, non-programmed modules. They can lead to incorrect fuel trims, erratic transmission behavior, and frustrating security system lockouts. Our process of programming the 2010 Hummer H3 ECM 12678513 to your specific VIN *before* it ships eliminates these headaches. It’s the difference between a frustrating weekend of troubleshooting and a successful, straightforward repair that gets your Hummer running the way it was designed to.
CTS 14 Electronic Control Module; Cpe, 6.2L
CTS 15 Electronic Control Module; Cpe
CAMARO 12 Electronic Control Module; 3.6L, ID 12633264
CTS 14 Electronic Control Module; Sdn, 6.2L
HUMMER H3 10 Electronic Control Module; (RH firewall), 5.3L
CTS 10-13 Electronic Control Module; (RH front engine compartment), 6.2L
CORVETTE 10-13 Electronic Control Module; (RH engine compartment), 6.2L, VIN R (8th digit, opt LS9)
COLORADO 10-12 Electronic Control Module; (RH firewall), 5.3L
CAMARO 12 Electronic Control Module; 6.2L, ID 12633264
CAMARO 13-15 Electronic Control Module; 6.2L, VIN P (8th digit, opt LSA)
CORVETTE 10-13 Electronic Control Module; (RH engine compartment), 6.2L, VIN T (8th digit, opt LS9)
CTS 14 Electronic Control Module; SW, 6.2L
MALIBU 10-12 Electronic Control Module; 3.6L
Frequently Asked Questions
Do I need to do anything after installing this ECM?
Yes. While the main engine programming is complete, you will need to perform a security relearn procedure (often called a Passlock or anti-theft relearn) to allow the vehicle to start. This procedure can typically be done without special tools and involves a sequence of key cycles. In some cases, a crankshaft position sensor relearn may also be necessary, which requires a capable scan tool.
How do I provide my VIN?
After you complete your purchase, you can send us a message with your 17-digit Vehicle Identification Number (VIN). We cannot ship your part until we receive this information, as the programming is essential for the part to function in your vehicle.
Will this fix my check engine light?
If your check engine light is caused by an internal failure of the ECM (indicated by codes like P0601, P0606, etc.), then this unit is the correct solution. However, it’s crucial to ensure your vehicle has been properly diagnosed, as the light can also be triggered by faulty sensors, wiring, or other components.
Is this a new or used part?
This is a high-quality, fully tested component that has been verified to meet or exceed original equipment specifications. It is programmed and prepared to provide reliable service for your vehicle.
What if my original part number is different?
This ECM, service number 12678513, is a direct replacement for service number 12633264. Please review the detailed fitment list on this page. If your vehicle and engine option are listed, this part is compatible.