Get Your Hummer Back to Peak Performance
Is your 2010 Hummer H3 feeling sluggish, stalling unexpectedly, or showing a persistent Check Engine Light? A failing Engine Control Module (ECM) is often the culprit, crippling the powerful 5.3L engine you rely on. This isn’t just an inconvenience; it’s a loss of the confidence and capability that defines the Hummer experience. This pre-programmed ECM is your direct-fit, reliable solution to get your H3 running strong again, eliminating the guesswork and frustration of complex electronic repairs.
Common Symptoms of a Failing H3 ECM & Your Solution
A faulty ECM can cause a cascade of confusing issues. If you’re experiencing any of the following, it’s a strong indicator that your engine computer needs replacement:
- Persistent Check Engine Light (CEL) with codes like P0601, P0603, or P0606
- Engine stalling or cutting out while driving
- Complete no-start condition where the engine cranks but won’t fire
- Noticeable decrease in fuel economy
- Erratic automatic transmission shifting
- Poor engine performance, hesitation, or misfires
This unit is the definitive fix for these problems. We take a genuine OEM module and program it with the latest GM software updates specifically for your vehicle’s VIN. This ensures that when you receive your 2010 Hummer H3 ECM 12633264, it’s ready for a straightforward installation, restoring the factory-intended performance and communication between all your vehicle’s critical systems.
Features & Benefits
- ✔ VIN-Programmed for Your H3: Arrives ready to install with no need for expensive dealer programming. Just plug it in, perform the security relearn, and drive.
- ✔ Latest GM Software Updates: Flashed with the newest calibrations to improve engine efficiency, transmission performance, and overall reliability.
- ✔ Restores Full Engine Power: Eliminates the electronic glitches that cause poor performance, hesitation, and stalling.
- ✔ Cost-Effective Solution: A smart, affordable alternative to the high costs and wait times associated with a dealership repair.
- ✔ Direct OEM Replacement: Guaranteed compatibility, replacing service numbers 12633264 and 12678513 for a perfect fit.
- ✔ This unit is backed by our one-year replacement warranty.
An Expert’s Note on Modern Vehicle Electronics
In a vehicle like your Hummer H3, the ECM doesn’t work in isolation. It’s the ‘brain’ that constantly communicates with the Transmission Control Module (TCM), Body Control Module (BCM), and anti-lock brake system. That’s why simply installing a used, non-programmed ECM from a junkyard often creates more problems than it solves. Our VIN-specific programming is the crucial step that ensures all these modules speak the same language, preventing communication errors and ensuring every system functions exactly as the engineers designed.
Don’t let a bad computer keep your legendary H3 parked. This is the most reliable and efficient way to solve your ECM problems and restore the rugged dependability you need. By ordering this pre-programmed 2010 Hummer H3 ECM 12633264, you’re not just buying a part; you’re investing in a confident and powerful driving experience.
Frequently Asked Questions
Do I need to do any programming myself?
No. This ECM arrives pre-programmed to the VIN you provide. The only step required after installation is a simple security relearn procedure (also known as a key relearn), which can be done without any special tools and typically takes 15-30 minutes. Instructions are readily available online for your specific model.
How do I provide my vehicle’s VIN?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). We will then program the module before shipping it to you. This ensures a perfect match for your vehicle’s specific configuration.
Is this the correct ECM for my vehicle?
This unit, part number 12633264, is a direct replacement for the 2010 Hummer H3 with the 5.3L engine. It also fits a variety of other GM vehicles as listed in the compatibility chart. Please verify that your original ECM has the service number 12633264 or 12678513 to ensure a perfect match.
Will this fix my specific problem?
This ECM is a direct solution for issues caused by a failing engine computer, such as internal processor faults (P0601, P0606), stalling, and no-start conditions. While it solves the most common electronic engine problems, we always recommend a proper diagnosis by a qualified mechanic to confirm the ECM is the root cause of your issue.
What is the warranty on this part?
This unit is backed by our one-year replacement warranty, providing you with confidence and peace of mind in your purchase.