Restore Your H3’s Heartbeat and Conquer the Road Again
Is your normally unstoppable 2006 HUMMER H3 suddenly hesitant, erratic, or lighting up the dashboard like a holiday tree? A faltering Powertrain Control Module (PCM) can be the hidden culprit behind a host of frustrating issues, turning your confident command of the road into a daily source of anxiety. Forget the dealership headaches and costly programming fees. This is your direct, straightforward solution to restore your H3’s performance and your peace of mind. We provide a meticulously prepared engine computer, flashed with the latest GM-certified software and specifically programmed to your vehicle’s unique VIN. It’s the closest you can get to a brand-new brain for your truck, ready for a simple installation right out of the box.
Symptoms of a Failing PCM & The Benefits of This Solution
If you’re experiencing any of the following, a failing PCM is a very likely cause. Replacing it can bring your HUMMER back to life.
- ✔ Persistent Check Engine Light: Often with communication-related Diagnostic Trouble Codes (DTCs) like P0601, P0602, or P0606.
- ✔ Rough or Unpredictable Shifting: The PCM controls transmission logic, and a fault can cause harsh shifts or gear hunting.
- ✔ Poor Fuel Economy: Inaccurate sensor readings or faulty calculations can lead to a noticeable drop in MPG.
- ✔ Engine Stalling or No-Start: The most severe symptom, where the PCM fails to manage fuel and spark, leaving you stranded.
- ✔ Hesitation and Power Loss: Your H3 feels sluggish and unresponsive, lacking the power you depend on.
- ✔ VIN-Specific Programming: We handle the complex part. Your module arrives ready to work, communicating perfectly with your H3’s other systems.
An Expert’s Note: The “Brain Transplant” Story
I remember a customer, Mark, who brought his H3 to my old shop. He was frustrated, having been told by a dealership he needed a new $1500 module plus hours of labor for programming. His truck would randomly stall at red lights—a dangerous and stressful situation. We sourced a pre-programmed module just like this one. In under an hour, we had the old one out and the new one in. After a quick security relearn, the H3 fired up and idled smoother than it had in years. The look of relief on Mark’s face was priceless. He saved a fortune and, more importantly, regained trust in his vehicle. That’s the power of a direct, effective solution.
Effortless Installation for a Confident Fix
You don’t need to be a master technician to complete this job. With basic hand tools and a little patience, you can get your H3 running right. This is a simple component swap that restores complex functionality.
- Safety First: Always disconnect the negative terminal of your vehicle’s battery before starting any electrical work.
- Locate the Module: On your 2006 H3, the PCM is typically located on the right-hand (passenger) side of the firewall in the engine bay.
- Disconnect the Connectors: Carefully unclip the wiring harness connectors from the old module. They have locking tabs, so be gentle to avoid damage.
- Remove the Old PCM: Unbolt the old module from its mounting bracket. Keep the hardware safe as you’ll need it for the new one.
- Install the New Module: Mount your new, pre-programmed 2006 HUMMER H3 PCM and securely reconnect the wiring harnesses. You should hear a ‘click’ as they lock in place.
- Reconnect the Battery: Re-attach the negative battery terminal.
- Perform Security Relearn: You will likely need to perform a simple key-cycle security relearn procedure. This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then ‘OFF’, and repeating two more times. This allows the vehicle’s anti-theft system to recognize the new PCM.
Guaranteed Fitment for Your Vehicle
This module is a direct replacement for a wide range of part numbers and is confirmed to fit the following vehicles. Providing your VIN upon purchase ensures we send the correctly programmed unit for your specific application.
- HUMMER H3: 2006 (Electronic Control Module; RH firewall)
- CHEVROLET COLORADO: 2004-2006 (Electronic Control Module; RH firewall)
- GMC CANYON: 2004-2006 (Electronic Control Module; RH firewall)
- BUICK RAINIER: 2006 (Electronic Control Module; LH engine, 4.2L)
- CHEVROLET TRAILBLAZER: 2006 (Electronic Control Module; LH engine, 4.2L)
- CHEVROLET TRAILBLAZER EXT: 2006 (Electronic Control Module; LH engine, 4.2L)
- GMC ENVOY: 2006 (Electronic Control Module; 4.2L, LH engine)
- GMC ENVOY XL: 2006 (Electronic Control Module; LH engine, 4.2L)
- ISUZU ASCENDER: 2006 (Electronic Control Module; 4.2L, LH engine)
- ISUZU I-280: 2006 (Electronic Control Module; RH firewall)
- ISUZU I-350: 2006 (Electronic Control Module; RH firewall)
- SAAB 9-7X: 2006 (Electronic Control Module; LH engine, 6 cylinder)
This part is a direct replacement for 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.
Your Questions Answered About the 2006 HUMMER H3 PCM
What does ‘VIN-programmed’ actually mean?
It means we load the module with the specific software and calibrations for your HUMMER H3 based on its Vehicle Identification Number (VIN). This ensures it works correctly with your engine, transmission, and options package, just like a module from the factory. It’s not a generic, one-size-fits-all part.
Is this part truly ‘plug and play’?
For the most part, yes. Because we pre-program it, you will not need a dealer’s scan tool for software installation. However, you will need to perform a simple ‘security relearn’ procedure with your key, which takes about 30 minutes and pairs the module to your vehicle’s anti-theft system. Instructions are readily available online and are easy to follow.
Do I need to send my old PCM (core) back?
This listing does not require a core return. You can keep your old module, which saves you the time and expense of shipping it back.
My original part number isn’t on the list, but my vehicle is. Will this work?
The list of part numbers covers the most common ones, but GM often has many superseded numbers. As long as your vehicle is a 2006 HUMMER H3, this is the correct module. The critical step is providing us with your VIN so we can flash the exact software your truck needs.
What if I install it and still have problems?
While this module will fix issues caused by a faulty PCM, it won’t fix underlying mechanical or wiring problems. If issues persist, we recommend checking for solid ground connections, inspecting the wiring harness for damage, and ensuring other sensors are functioning correctly. Our support team is here to help you diagnose the situation.