Bring Your H2 Back to Life
Is your HUMMER H2 or GM truck suffering from frustrating and hard-to-diagnose issues? A failing Powertrain Control Module (PCM) can cause everything from a persistent check engine light and rough idling to stalling and transmission problems, leaving your powerful vehicle feeling sluggish and unreliable. Don’t let a faulty computer keep you off the road. This is the direct, dependable solution to restore your vehicle’s peak performance and operational integrity.
Common Symptoms & Your Solution
If you’re experiencing any of the following, a faulty PCM is the likely culprit:
- Check Engine Light (CEL) with communication-related DTCs (e.g., U-codes)
- Engine stalling, sputtering, or misfiring
- Poor fuel economy
- Erratic or harsh transmission shifting
- Failure to pass emissions testing
- Complete no-start condition
This fully programmed module is the definitive fix. We flash the unit with the latest GM-certified software specifically for your vehicle using the VIN you provide. This ensures that all factory performance parameters, shift points, and fuel strategies are perfectly calibrated, making installation straightforward and effective. When you order this Programmed 2003-2007 HUMMER H2 PCM, you’re not just buying a part; you’re getting a fully integrated solution.
Features & Benefits
- ✔ VIN-Specific Programming: Arrives flashed with the newest GM updates for your exact vehicle. No dealer visit required for programming.
- ✔ Plug-and-Play Installation: Once you receive the module, installation is simple. In most cases, no complicated security relearn procedures are needed.
- ✔ Restored Performance: Corrects engine and transmission issues, restoring the smooth power delivery and efficiency you expect from your truck.
- ✔ Guaranteed Compatibility: A direct replacement for a wide range of GM service numbers including 12589463, 89017750, 12582605, and more.
- ✔ This unit is backed by our one-year replacement warranty.
Expert Insight from the Garage
As a technician with over two decades of experience, I’ve seen countless drivers chase their tails replacing sensors and components, only to find the root cause was the PCM all along. The key to a successful PCM replacement is the programming. A module from a salvage yard or one with incorrect software can create more problems than it solves. By programming this unit to your specific VIN before it ships, we eliminate all guesswork. This ensures the PCM communicates flawlessly with your vehicle’s other modules—from the BCM to the ABS—just as the factory intended.
Getting your truck or SUV back in top form is our priority. This Programmed 2003-2007 HUMMER H2 PCM is your path to a reliable repair and renewed driving confidence. Simply provide your VIN after purchase, and we’ll handle the complex part, so you can get back on the road faster.
Frequently Asked Questions
What is a PCM and what does it do?
The Powertrain Control Module (PCM) is the central computer of your vehicle. It controls all aspects of the engine and transmission, including fuel injection, ignition timing, and transmission shift points, to ensure optimal performance, fuel economy, and emissions.
How do I provide my VIN number?
After you complete your purchase, simply send us a message with your vehicle’s 17-digit Vehicle Identification Number (VIN). We cannot ship your part until we receive this information, as it is essential for programming.
Is any additional programming required after installation?
In most cases, no. This PCM is sent to you ready to install. However, some vehicles may require a security relearn procedure (often called a CASE relearn or anti-theft relearn), which can typically be done without special tools. Instructions are widely available online for this simple process.
My original part number isn’t 12589463. Will this still work?
Yes, this unit is a compatible replacement for all service numbers listed in the description, including 89017750, 12582605, 12602802, and others. The crucial factor is the VIN programming, which makes it correct for your specific vehicle.
Where is the PCM located on my vehicle?
On most compatible GM trucks and SUVs like the HUMMER H2, Silverado, and Tahoe, the PCM is located in the engine bay, on the driver’s side, under or next to the battery tray.