Restore Peak Performance to Your H3
Is your 2006 HUMMER H3 acting unpredictably? A faulty Powertrain Control Module (PCM) can be the hidden culprit behind a host of frustrating issues, turning your reliable workhorse into a source of daily stress. From a persistent check engine light to rough idling and poor fuel economy, a failing computer can disrupt your vehicle’s core operations. This replacement PCM is the definitive solution, arriving at your doorstep fully programmed to your vehicle’s specific VIN. We handle the complex flashing process with the latest GM software updates, so you receive a component that’s ready for a straightforward installation, getting you back on the road with confidence.
Warning Signs and How to Overcome Them
If you’re experiencing any of the following, it might be time for a new engine computer. Replacing your failing module can restore the crisp, responsive performance you expect from your truck.
- ✔ Persistent Check Engine Light (CEL)
- ✔ Diagnostic Trouble Codes (DTCs) such as P0601, P0606, or other module-related faults
- ✔ Unexplained drop in fuel efficiency
- ✔ Rough or erratic engine idle
- ✔ Hesitation or stalling during acceleration
- ✔ Harsh or incorrect transmission shifting
- ✔ Complete no-start condition where the engine cranks but won’t fire
Guided Installation for Your 2006 HUMMER H3 PCM
Replacing the PCM is a manageable task for a DIY enthusiast. Follow these steps carefully to ensure a smooth and successful installation. Remember, safety first!
- Disconnect the Power: Start by disconnecting the negative terminal from your vehicle’s battery. This crucial safety step prevents any electrical shorts or damage to the new module.
- Locate the Old Module: On your 2006 H3, the PCM is typically located on the right-hand (passenger side) of the firewall in the engine bay.
- Unplug the Connectors: Carefully disengage the wiring harness connectors from the old PCM. These connectors have locking tabs that need to be released. Inspect the connectors and pins for any signs of corrosion or damage before proceeding.
- Remove the Old PCM: Unbolt the old module from its mounting bracket. It’s usually held in place by a few bolts or nuts.
- Install the New Module: Seat your new, pre-programmed PCM into the mounting bracket and secure it with the original hardware.
- Reconnect Everything: Plug the wiring harnesses firmly into the new module until they click into place. Reconnect the negative battery terminal.
- Perform Security Relearn: In many cases, you will need to perform a simple security relearn procedure to sync the new PCM with your vehicle’s anti-theft system. This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating two more times before starting the engine.
Expert Diagnostic Tip
Before you condemn your old PCM, take a moment to inspect the ground wires connected to the engine block and chassis. A loose or corroded ground is one of the most common, and often overlooked, causes of erratic module behavior. Ensuring all grounds are clean and tight can sometimes resolve the issue and will always ensure your new PCM has the stable electrical foundation it needs to operate flawlessly for years to come.
Tailored Fit for Your Ride
This module is a direct-fit replacement for a range of GM vehicles, ensuring perfect compatibility and function. Please verify your vehicle is on the list below. This computer is compatible with the following 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.
- BUICK RAINIER 2006 (4.2L)
- CHEVROLET COLORADO 2004-2006
- CHEVROLET TRAILBLAZER 2006 (4.2L)
- CHEVROLET TRAILBLAZER EXT 2006 (4.2L)
- GMC CANYON 2004-2006
- GMC ENVOY 2006 (4.2L)
- GMC ENVOY XL 2006 (4.2L)
- HUMMER H3 2006
- ISUZU ASCENDER 2006 (4.2L)
- ISUZU I-280 2006
- ISUZU I-350 2006
- SAAB 9-7X 2006 (6 cylinder)
Frequently Asked Questions
Do I need to do any programming myself?
No. We handle all the programming for you. Simply provide your vehicle’s VIN during checkout, and we will flash the module with the latest GM software specific to your vehicle, making it ready for installation right out of the box.
What is the security relearn procedure?
The security relearn, or anti-theft relearn, syncs the new PCM to your vehicle’s keys. The most common method is to turn the ignition key to the ‘ON’ position (without starting the engine) for 10-15 minutes, then turn it ‘OFF’ for 10 seconds. Repeat this cycle three times. On the third cycle, the vehicle should start and run normally.
Where is this module located on my 2006 HUMMER H3?
The PCM is located in the engine compartment, mounted to the firewall on the passenger’s side of the vehicle.
Is this guaranteed to fix my truck’s problem?
This programmed 2006 HUMMER H3 PCM will resolve any issues directly caused by a faulty computer. However, vehicle diagnostics can be complex. If your problems are caused by other failing components (like a bad sensor or wiring short), this module will not fix those underlying issues. It’s always best to have a proper diagnosis performed.
Do you need my old part back?
This listing does not require a core return. You can keep or dispose of your old module at your convenience, saving you the time and hassle of a return shipment.