Restore Peak Performance to Your HUMMER H2
Is your 2007 HUMMER H2 running rough, stalling unexpectedly, or showing a persistent Check Engine Light? As a technician with over two decades of experience, I’ve seen firsthand how a failing Engine Control Module (ECM) can turn a capable truck into a source of constant frustration. The ECM is the brain of your vehicle, managing everything from fuel injection and ignition timing to transmission shifts. When it fails, the symptoms can be confusing and intermittent, making diagnosis a headache. This isn’t just an inconvenience; it’s a matter of reliability and safety.
This module is the definitive solution. We take the guesswork and high dealership costs out of the equation. Each unit is professionally programmed with the latest GM software updates specifically for your vehicle’s VIN. This ensures perfect communication between all onboard systems and restores the precise performance your H2 was designed to deliver. You’re not just buying a part; you’re getting a fully integrated, ready-to-install fix.
From the Diagnostic Bay: A Tricky H2 No-Start
A few months back, a 2007 H2 was towed into my shop. The owner was frustrated—it would crank but not start one day, then run perfectly fine the next. He had already replaced the battery and checked the fuel pump. After hooking up my scan tool, I noticed intermittent communication loss with the ECM (a classic U0100 code) and a history code for P0601 (Internal Control Module Memory Check Sum Error). These pointed directly to a failing computer. We installed a VIN-programmed module just like this one, and the H2 fired up instantly. It’s been running without a single issue since. These symptoms are textbook for a failing ECM.
Is Your HUMMER Showing These Symptoms?
A faulty ECM can cause a wide range of issues. If you’re experiencing any of the following, this module is the likely solution:
- ✔ Check Engine Light is on with codes like P0601, P0606, or U0100
- ✔ Engine cranks but refuses to start
- ✔ Intermittent stalling or rough idling
- ✔ Noticeable decrease in fuel economy
- ✔ Poor engine performance or hesitation during acceleration
- ✔ Automatic transmission shifting erratically
A Straightforward Guide to Installation
Installing your new 2007 HUMMER H2 Engine Control Module is a job most DIYers can handle in under an hour. Our pre-programming service eliminates the need for a trip to the dealer.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post to prevent accidental contact.
- Locate the ECM: On the 2007 HUMMER H2, the ECM is located in the engine bay, on the driver’s side, typically under the battery tray. You will need to remove the battery to access it.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old module. They have locking tabs that need to be released. Once disconnected, unbolt the old ECM from its mounting bracket.
- Install the New Module: Bolt the new, programmed ECM into place. Reconnect the electrical connectors, ensuring they click securely into position.
- Final Steps: Reinstall the battery and connect the negative terminal. In most cases, you will need to perform a simple security relearn procedure (often called a Passlock or Passkey relearn), which can be done without special tools. Instructions are readily available online or in your owner’s manual.
Guaranteed Fitment for Your GM Vehicle
This ECM, part number 12603892, is a direct replacement for service numbers 12589297, 12597121, and 19210738. It is guaranteed to fit the following vehicles:
- AURA 07 Electronic Control Module; (RH firewall), 3.5L
- AVALANCHE 1500 07 Electronic Control Module; (LH front under battery)
- CORVETTE 06-07 Electronic Control Module; (RH engine compartment)
- EQUINOX 07 Electronic Control Module; (LH engine compartment)
- ESCALADE & ESV/EXT 07 Electronic Control Module; (LH front under battery)
- G6 07 Electronic Control Module; (LH front engine compartment), 3.5L & 3.9L
- G8 08 Electronic Control Module; 6.0L
- HUMMER H2 07 Electronic Control Module; (LH front under battery), engine control
- IMPALA 07 Electronic Control Module; (lower part of air cleaner box), 3.5L & 3.9L
- MALIBU 07 Electronic Control Module; 3.5L & 3.9L
- MONTE CARLO 07 Electronic Control Module; (lower part of air cleaner box), 3.5L & 3.9L
- SIERRA 1500/2500/3500 PICKUP 07 (new style) Electronic Control Module; (LH front under battery), 6.0L or w/o 4.3L
- SIERRA DENALI 07 (new style) Electronic Control Module; (LH front engine compartment)
- SILVERADO 1500/2500/3500 PICKUP 07 (new style) Electronic Control Module; (LH front under battery), 6.0L or w/o 4.3L
- SUBURBAN 1500/2500 07 Electronic Control Module; (LH front under battery)
- TAHOE 07 Electronic Control Module; (LH front under battery)
- TORRENT 07 Electronic Control Module; (LH engine compartment)
- YUKON & YUKON XL 1500/2500 07 Electronic Control Module; (LH front under battery)
Frequently Asked Questions
Frequently Asked Questions
How do I provide my VIN for programming?
After you complete your purchase, simply send us a message with your 17-digit Vehicle Identification Number (VIN). We cannot ship the module until we receive this information.
Is this a plug-and-play part?
Yes, for the most part. Because we program it to your VIN, it eliminates the need for dealer-level programming. However, you will likely need to perform a standard security relearn procedure, which takes about 30 minutes and requires only your ignition key.
Will this fix my specific problem?
This module corrects issues directly caused by a faulty ECM, such as the symptoms listed above. While it is a very common point of failure, we always recommend a proper diagnosis by a qualified mechanic to confirm the ECM is the root cause of your vehicle’s issues.
Do I need to send my old ECM back?
No core charge or return is required for this part. You can keep or responsibly dispose of your old module.
What if my part number is slightly different?
This module is a direct replacement for part numbers 12589297, 12597121, 12603892, and 19210738. As long as your original module is one of these numbers, this part will work correctly.