Get Your H2’s Commanding Power Back
Is your Hummer H2, Escalade, or Sierra feeling less like a beast and more like a burden? A failing Powertrain Control Module (PCM) can be the hidden culprit behind a host of frustrating issues, from poor engine performance and erratic shifting to a dreaded no-start condition. This isn’t just an inconvenience; it robs your truck of its core identity of power and reliability. It’s time to restore the heart of your vehicle with a solution that’s as dependable as your truck was built to be. This module is the definitive fix, arriving pre-programmed to your specific Vehicle Identification Number (VIN) for a straightforward, hassle-free installation.
Common Symptoms & Your Solution
If you’re experiencing any of the following, a faulty PCM is the likely cause. This pre-programmed unit is designed to be the direct solution for these problems:
- Persistent Check Engine Light (CEL)
- Diagnostic Trouble Codes (DTCs) like P0601, P0602, P0606, or U-series communication codes
- Harsh or unpredictable transmission shifting
- Engine stumbling, misfiring, or poor fuel economy
- Complete no-start or intermittent stalling issues
- Inability for scan tools to communicate with the module
By installing our precisely programmed 2003-2007 Hummer H2 PCM, you’re not just replacing a part; you’re restoring your vehicle’s brain, ensuring all systems operate in perfect harmony as the factory intended.
Features & Benefits
- โ Plug-and-Play Installation: This module arrives fully programmed to your vehicle’s VIN. No expensive dealer visits or special tools are required for programming.
- โ Loaded with Latest GM Software: We flash each unit with the most current GM updates, which can resolve original factory bugs and improve overall performance and efficiency.
- โ Restored Engine Performance: Experience the return of smooth idling, crisp throttle response, and correct fuel and timing calculations for optimal power.
- โ Seamless Transmission Operation: By restoring proper communication between the engine and transmission, this PCM ensures smooth, predictable gear changes.
- โ Guaranteed Compatibility: Providing your VIN ensures this computer is a perfect match for your truck’s specific engine, transmission, and factory options.
- โ Buy with Confidence: This unit is backed by our one-year replacement warranty.
Expert Insight: The Dreaded P0601 Code
As a veteran technician, one of the most definitive trouble codes I see is a P0601: Internal Control Module Memory Check Sum Error. This isn’t a faulty sensor or a wiring issue; it’s the PCM’s internal self-check reporting a critical failure. It’s essentially the computer telling you its core memory is corrupted and it can no longer be trusted to manage your engine. In 99% of cases, this code means the PCM has failed internally and requires replacement. Trying to clear the code is futileโit will return immediately. Installing this pre-programmed 2003-2007 Hummer H2 PCM is the correct and final repair for this specific fault.
Fitment Information
This PCM is a direct replacement for service numbers 89017750, 12582605, 12589463, 12602802, 89017734, and 28042802. It fits a wide range of GM trucks and SUVs, including but not limited to the Hummer H2, Chevrolet Avalanche, Silverado, Suburban, Tahoe, GMC Sierra, Yukon, and Cadillac Escalade from approximately 2003 to 2007. Please verify your service number or contact us with your VIN to confirm perfect fitment.
Frequently Asked Questions
Is this PCM really ready to install out of the box?
Yes. After you purchase, you must provide us with your vehicle’s VIN. We use that VIN to program the module with the correct factory software and calibrations for your specific truck. This makes the installation process as simple as swapping the part, with no further programming needed.
Where do I send my VIN?
You can add your VIN to the notes section during checkout or reply to your order confirmation email with the information. We cannot ship your order until we receive the VIN to program the unit.
Will this fix my transmission shifting problems?
In many cases, yes. The PCM controls engine performance and communicates critical data to the Transmission Control Module (TCM) to determine shift points. If the PCM is sending bad data, shifting will be erratic. Replacing a faulty 2003-2007 Hummer H2 PCM often resolves these communication-based shifting issues.
Do I need to perform a security relearn procedure?
For most vehicles in this generation, a simple security relearn procedure may be required after installation. This procedure typically takes 10-30 minutes, involves turning the key on and off in a specific sequence, and does not require any special tools. We include instructions to guide you through it.
What if my truck has performance modifications?
This PCM is programmed with standard, factory GM calibrations. It is not designed to account for significant aftermarket modifications like forced induction, aggressive camshafts, or non-stock fuel injectors. It is intended for vehicles with stock or near-stock configurations.
Where is the PCM located on my vehicle?
On most compatible models like the Hummer H2, Silverado, and Sierra, the PCM is located in the engine bay, on the driver’s side, under or next to the battery tray. Always disconnect the battery before attempting to remove or install the module.