Restore Peak Performance to Your 2006 HUMMER H3
Is your 2006 HUMMER H3 suffering from frustrating and unpredictable issues? A faulty Powertrain Control Module (PCM), the central computer of your vehicle, is often the culprit behind a wide range of performance problems. This replacement PCM is the definitive solution to get your rugged H3 running smoothly and reliably again. It arrives fully programmed to your vehicle’s specific Vehicle Identification Number (VIN), ensuring a seamless installation process and restoring the precise engine and transmission management your vehicle requires.
The PCM is responsible for managing critical systems, including fuel injection, ignition timing, transmission shift points, and emissions controls. When it begins to fail, the symptoms can be intermittent and difficult to diagnose, often mimicking other mechanical failures. By replacing your old, malfunctioning unit with this pre-programmed module, you are not just swapping a part; you are restoring the core logic that makes your vehicle perform as it should. We handle the complex programming for you, loading the latest GM-certified software updates to ensure optimal efficiency and performance, eliminating the need for an expensive trip to a dealership.
Symptoms of a Failing 2006 HUMMER H3 PCM
- ✔ Check Engine Light: The check engine light is illuminated, often with communication-related trouble codes (U-codes) or multiple, seemingly unrelated sensor codes.
- ✔ No-Start or Hard Starting: The engine cranks but refuses to start, or takes an unusually long time to fire up, either hot or cold.
- ✔ Poor Engine Performance: You may experience a noticeable loss of power, hesitation during acceleration, or rough, inconsistent idling.
- ✔ Erratic Transmission Shifting: The automatic transmission may shift harshly, at the wrong times, or get stuck in a single gear (limp mode).
- ✔ Reduced Fuel Economy: A failing PCM can’t efficiently manage the fuel-to-air ratio, leading to a sudden and significant drop in your miles per gallon (MPG).
- ✔ Stalling: The engine may stall unexpectedly while driving or when coming to a stop.
- ✔ Failed Emissions Test: Inability to pass a smog check is a common indicator of a PCM that is not correctly managing the vehicle’s emissions systems.
The Plug-and-Play Advantage: VIN Programming Included
The biggest hurdle in replacing a modern vehicle computer is the programming. This 2006 HUMMER H3 PCM is sold with a crucial service included: we flash the module with the latest factory software and program it using the VIN you provide. This means the module arrives ready for installation. In most cases, after connecting the new PCM, you will only need to perform a simple security relearn procedure, which can be done in your own driveway without any special tools. This process syncs the new computer with your vehicle’s anti-theft system.
Installation and Security Relearn
Physical installation is straightforward. The PCM is typically located on the right-hand (passenger side) firewall in the engine bay. Disconnect the battery, carefully unplug the electrical connectors from the old module, unbolt it, and then install the new one in its place. Once reconnected, you will likely need to perform the security relearn procedure, often referred to as the “10-minute key cycle.” Instructions are readily available and simple to follow, typically involving turning the key to the ‘ON’ position for 10 minutes, then off, and repeating two more times before starting the engine.
Guaranteed Compatibility
This module is a direct replacement for a wide range of original equipment part numbers, ensuring broad compatibility. If your original module carries any of the following numbers, this unit is the correct fit for your vehicle:
Part Numbers: 12569773, 12588650, 12589311, 12589585, 12591647, 12591648, 12593531, 12593532, 12594430, 12594431, 12596783, 12596784, 12597521, 12597776, 12597777, 12600818, 12604438, 12604439, 12606369, 12606373, 12606374, 12606398, 12606399, 19209820, 19209821.
This Electronic Control Module also fits the following vehicles:
- 2004-2006 Chevrolet Colorado
- 2004-2006 GMC Canyon
- 2006 Buick Rainier (4.2L)
- 2006 Chevrolet Trailblazer & Trailblazer EXT (4.2L)
- 2006 GMC Envoy & Envoy XL (4.2L)
- 2006 Isuzu Ascender (4.2L)
- 2006 Isuzu i-280 & i-350
- 2006 Saab 9-7x (6 cylinder)
Frequently Asked Questions
Do I need to have this PCM programmed?
No. We handle all the programming for you before shipment. Simply provide your vehicle’s VIN during or after checkout, and the module will arrive with the correct software, ready for installation.
What is a VIN and why do you need it?
The VIN (Vehicle Identification Number) is a unique 17-digit code for your specific vehicle. We use it to access the exact factory software and calibration files from GM, ensuring the PCM is a perfect match for your H3’s engine, transmission, and options.
Is this a difficult part to install myself?
For someone with basic mechanical skills, the installation is very manageable. It involves disconnecting the battery, unplugging a few connectors, and removing a few bolts. The most important post-installation step is the security relearn procedure, which requires no special tools.
What if I install this and my problem doesn’t go away?
While the PCM is a common point of failure, these symptoms can sometimes be caused by other issues like faulty sensors, wiring problems, or fuel delivery issues. We recommend a proper diagnosis before purchase. However, replacing the PCM often rules out the most complex component in the system.
How can I be sure my original PCM is bad?
A definitive diagnosis often requires a professional scan tool to check for communication errors with the module (U-codes). Other strong indicators include multiple unrelated error codes, symptoms that persist after replacing related sensors, or a complete no-start condition where spark and fuel injector pulse are absent.