Bring Your HUMMER Back to Life
Is your 2006 HUMMER H3 feeling sluggish, unpredictable, or lighting up the dashboard like a holiday tree? A failing Powertrain Control Module (PCM) can be the hidden culprit behind frustrating issues like poor fuel economy, erratic shifting, and even a no-start condition. Don’t let a faulty computer keep you from your next adventure. This direct-replacement PCM is the heart of your vehicle’s operation, and we deliver it to your door fully programmed to your H3’s specific Vehicle Identification Number (VIN). This isn’t just a part; it’s the first step to regaining that smooth, powerful, and worry-free drive you expect from your vehicle.
Warning Signs Your PCM Needs Attention
If you’re experiencing any of the following, it’s a strong indicator that your engine computer is failing. Replacing it can resolve these persistent problems and restore your vehicle’s factory performance.
- ✔ Persistent Check Engine Light (CEL) that won’t clear.
- ✔ Diagnostic Trouble Codes (DTCs) like P0601, P0606, or other internal controller errors.
- ✔ Unexplained drops in fuel mileage.
- ✔ Harsh or delayed transmission shifting.
- ✔ Engine stalling, misfiring, or rough idling.
- ✔ The vehicle won’t start, even with a good battery and starter.
- ✔ Communication errors with diagnostic scan tools.
An Expert’s Diagnostic Tip
Before replacing your PCM, take a moment to perform a ‘wiggle test.’ With the key on, gently wiggle the main wiring harness connectors at the computer. If the engine stumbles or the problem appears/disappears, you may have a connection issue, not a failed module. Also, always check for clean, tight battery terminals and chassis grounds—a poor ground can mimic PCM failure and cause countless headaches. A few minutes of inspection can save you hours of frustration.
Guided Installation for Your 2006 HUMMER H3 PCM
We’ve made this repair as straightforward as possible. With our pre-programmed module, you can confidently get the job done right in your own garage. Follow these steps for a successful installation:
- Safety First: Disconnect the negative terminal from your vehicle’s battery and wait at least 15 minutes to allow all systems to power down completely.
- 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 and Remove: Carefully unplug the electrical connectors from the old PCM. There are usually locking tabs that need to be released. Once disconnected, unbolt the module from its mounting bracket.
- Install the New Unit: Mount your new, pre-programmed PCM securely onto the bracket. Reconnect the wiring harnesses, ensuring they click firmly into place.
- Final Steps: Reconnect the negative battery terminal. The vehicle may need to complete a security relearn procedure, which can often be done by cycling the key. Please refer to your owner’s manual or contact us for specific instructions. Start the engine and enjoy a restored ride!
Tailored Fit for Your Ride
This module is a direct replacement for a wide range of GM vehicles, ensuring perfect compatibility. We program it using the VIN you provide to match every specific option your vehicle came with from the factory. This unit is guaranteed to fit the following makes and models equipped with the specified engine:
- HUMMER H3: 2006
- Chevrolet Colorado: 2004-2006
- GMC Canyon: 2004-2006
- Buick Rainier: 2006 (4.2L)
- Chevrolet Trailblazer & Trailblazer EXT: 2006 (4.2L)
- GMC Envoy & Envoy XL: 2006 (4.2L)
- Isuzu Ascender: 2006 (4.2L)
- Isuzu i-280: 2006
- Isuzu i-350: 2006
- Saab 9-7x: 2006 (6 cylinder)
This computer replaces 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.
Frequently Asked Questions
Do I need to do any programming myself?
No. We handle all the programming before we ship the module. You just need to provide us with your vehicle’s VIN during checkout. The unit will arrive ready to install.
What is a VIN and where do I find it?
The VIN is your 17-digit Vehicle Identification Number. You can find it on your vehicle’s registration, insurance card, or on a small plate on the driver’s side of the dashboard, visible through the windshield.
Will this fix my specific problem?
This PCM is designed to resolve issues directly caused by a failing engine computer, including common internal fault codes, communication errors, and erratic engine behavior. While it corrects many problems, we always recommend a proper diagnosis to confirm the PCM is the root cause.
Is any special ‘relearn’ procedure required after installation?
In many cases, a simple key cycle procedure is all that’s needed for the security system to sync with the new PCM. For some vehicles, a Crankshaft Position Sensor (CASE) relearn may be beneficial and can be performed with a compatible scan tool. We can provide guidance if needed.
What if I order the wrong part?
Because we program each module to a specific VIN, it’s crucial to ensure compatibility before ordering. If you are unsure, please contact us with your vehicle information and we will be happy to verify the correct part for you.