Is Your 2007 Hummer H3 Running Rough?
A failing Engine Control Module, or ECM, can be the hidden cause of countless frustrating issues in your 2007 Hummer H3. As the central computer for your engine, the ECM is responsible for managing everything from fuel mixture and ignition timing to transmission shifting and emissions control. When it starts to fail, it can create a cascade of problems that are often difficult to diagnose, leading to wasted time and money on incorrect repairs. Symptoms can range from a simple check engine light to severe drivability problems or even a no-start condition, leaving you stranded.
This replacement ECM, part number 12602010 (also interchangeable with 19210067), is the definitive solution to restore your vehicle’s performance and reliability. Unlike units that require a trip to the dealership for expensive programming, this module arrives at your door fully programmed to your vehicle’s specific Vehicle Identification Number (VIN). This means a simpler, more direct installation process, getting you back on the road faster.
From the Diagnostic Bay
We had a 2007 GMC Envoy in the shop last month with a complaint that was driving the owner crazy. It would randomly stall at stoplights, but only when the engine was warm. There were no consistent trouble codes, just a generic U-code for lost communication that would pop up occasionally. The owner had already replaced the crank sensor and the fuel pump based on other shops’ advice. We hooked up our scope and monitored the 5-volt reference signal from the ECM. Sure enough, after about 20 minutes of idling, we saw the voltage signal become erratic and then drop out completely, causing the stall. It was a classic case of thermal failure inside the ECM. A new, properly programmed module like this one solved the problem instantly. It’s a reminder that intermittent, heat-related issues often point directly to the main computer.
Why Choose Our Pre-Programmed 2007 Hummer H3 ECM?
When you’re dealing with a critical component like the engine computer, you need a solution that is both reliable and straightforward. Our process eliminates the guesswork and additional costs associated with vehicle computer replacement. By providing us with your VIN during checkout, you ensure that the 2007 Hummer H3 ECM you receive is loaded with the latest GM-certified software specific to your vehicle’s configuration. This guarantees proper communication between all onboard modules and restores the precise operational parameters your engine needs to run efficiently and powerfully.
Common Symptoms of a Failing ECM
- ✔ Check Engine Light is on with various trouble codes (especially communication or sensor reference voltage codes).
- ✔ Engine stalling or shutting off unexpectedly while driving.
- ✔ Noticeable decrease in fuel economy.
- ✔ Rough idling, misfires, or hesitation during acceleration.
- ✔ The vehicle will not start, even though the battery and starter are good.
- ✔ Automatic transmission shifting erratically or harshly.
- ✔ Communication issues with diagnostic scan tools.
Simple Installation Process
Replacing the ECM is a manageable task for a confident DIYer. On the 2007 Hummer H3 and related platforms, the module is typically located on the right-hand (passenger side) of the firewall in the engine bay. After disconnecting the battery, you simply unplug the electrical connectors, unbolt the old unit, and install the new one. Once connected, a standard security relearn procedure (often called a ‘key-on/key-off’ cycle) may be required to sync the new ECM with your vehicle’s anti-theft system. This procedure is simple and does not require special tools. Detailed instructions can be easily found online or in your vehicle’s service manual.
Complete Vehicle Fitment
This electronic control module is a direct replacement for part numbers 12602010 and 19210067 and fits a wide range of GM trucks and SUVs. Please verify your part number and application before ordering.
- CANYON 07 Electronic Control Module; (RH firewall)
- COLORADO 07 Electronic Control Module; (RH firewall)
- ENVOY 07 Electronic Control Module; 4.2L (LH engine)
- ENVOY 08 Electronic Control Module; 4.2L (LH engine), ID 19210067
- HUMMER H3 07 Electronic Control Module; (RH firewall)
- ISUZU ASCENDER 07 Electronic Control Module; (4.2L, LH engine)
- ISUZU ASCENDER 08 Electronic Control Module; (4.2L, LH engine), ID 19210067
- ISUZU I-290 07 Electronic Control Module; (RH firewall)
- ISUZU I-370 07 Electronic Control Module; (RH firewall)
- RAINIER 07 Electronic Control Module; (LH engine), 4.2L
- SAAB 9-7X 07 Electronic Control Module; (LH engine), 6 cylinder
- SAAB 9-7X 08 Electronic Control Module; (LH engine), 4.2L
- TRAILBLAZER 07 Electronic Control Module; (LH engine), 4.2L
- TRAILBLAZER 08 Electronic Control Module; (LH engine), ID 19210067
Don’t let a faulty computer keep your truck off the road. Order this pre-programmed 2007 Hummer H3 ECM today and restore the performance and dependability you expect from your vehicle.
Frequently Asked Questions
Do I need to get this ECM programmed by a dealer?
No. This unit comes fully programmed to your vehicle’s specific VIN before it ships. It is ready for installation right out of the box, saving you the time and expense of a dealership visit.
What information do you need from me?
After you complete your purchase, you will need to provide us with your vehicle’s 17-digit VIN. This allows us to load the correct GM software and updates for your specific engine, transmission, and options.
Is this part truly plug-and-play?
Yes, for the most part. After physical installation, you may need to perform a simple security relearn procedure, which involves a series of key cycles. This does not require any special tools and allows the ECM to sync with your vehicle’s anti-theft system.
Will this fix my check engine light?
If the check engine light and associated codes are being caused by a faulty ECM, then this part will resolve the issue. However, if there are other failing sensors or mechanical problems with your vehicle, those issues will need to be addressed separately.
Where is the ECM located on my 2007 Hummer H3?
The Engine Control Module is typically located in the engine bay, mounted to the right-hand (passenger side) firewall.
What part numbers does this module replace?
This module is a direct replacement for GM part numbers 12602010 and 19210067. Please ensure one of these numbers matches the part you are replacing.