Restore Your Hummer’s Core Performance and Reliability
Is your 2006 HUMMER H3 suffering from frustrating and hard-to-diagnose issues? A failing Powertrain Control Module (PCM), the vehicle’s central computer, is often the hidden culprit behind poor engine performance, erratic shifting, and even no-start conditions. This isn’t just a replacement part; it’s a fully programmed, plug-and-play solution designed to restore your vehicle’s factory-spec operation. We take the guesswork and dealer expense out of the equation by flashing this module with the latest GM software, specifically matched to your vehicle’s VIN.
As a technician with over two decades of experience, I’ve seen countless vehicle owners and even professional shops chase their tails replacing sensors and pumps, only to find the PCM was the root cause all along. A faulty PCM can send incorrect signals, causing perfectly good components to behave erratically. This replacement 2006 HUMMER H3 PCM eliminates that diagnostic headache. By providing us with your VIN during checkout, you receive a module that is ready for installation right out of the box, ensuring seamless communication between your engine, transmission, and other critical systems.
Case Study: A Tricky Diagnosis
I remember a 2006 Chevy Colorado (which uses this exact same PCM) that came into the shop with a bizarre intermittent no-start condition. The owner had already replaced the battery and starter. We checked fuel pressure and spark, which were fine when it decided to run. The scanner showed a U0100 ‘Lost Communication with ECM/PCM’ code, but only intermittently. After checking all the wiring and grounds—a common first step—we suspected the module itself. We swapped in one of our pre-programmed PCMs, and the problem vanished instantly. The original PCM had a hairline crack in a circuit board that would expand and break connection when it warmed up. It’s a classic failure mode that this replacement solves permanently.
Common Signs of a Failing PCM
- ✔ Check Engine Light is on with codes like P0601, P0606 (Internal Control Module Failure).
- ✔ Vehicle refuses to start or has a hard starting condition.
- ✔ Unexplained drop in fuel economy.
- ✔ Rough idling, stalling, or poor engine performance.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Communication errors with scan tools or other modules (U-codes).
A Straightforward Guide to Installation
- ✔ Safety First: Disconnect the negative terminal from your vehicle’s battery and wait 10 minutes to ensure all systems are powered down.
- ✔ Locate the PCM: On the 2006 HUMMER H3, the PCM is typically located on the right-hand (passenger side) of the firewall in the engine bay.
- ✔ Disconnect the Module: Carefully unplug the electrical connectors. These usually have a locking tab or lever that needs to be released first. Avoid pulling on the wires themselves.
- ✔ Remove the Old PCM: Unbolt the old module from its mounting bracket.
- ✔ Install the New PCM: Mount your new, pre-programmed PCM and securely reconnect the electrical harnesses. You should hear a ‘click’ as they lock into place.
- ✔ Reconnect Battery: Re-attach the negative battery terminal.
- ✔ Perform Security Relearn: You may 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. Consult your owner’s manual for the specific procedure for your vehicle.
Verified Vehicle Compatibility
This module is a direct-fit replacement for a wide range of GM vehicles and is guaranteed to function correctly if your vehicle is listed below. It replaces numerous original part numbers, ensuring you get the right component.
Compatible 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
Fits The Following Models:
- ✔ 2006 HUMMER H3 (RH firewall)
- ✔ 2004-2006 Chevrolet Colorado (RH firewall)
- ✔ 2004-2006 GMC Canyon (RH firewall)
- ✔ 2006 Buick Rainier (4.2L, LH engine)
- ✔ 2006 Chevrolet Trailblazer & Trailblazer EXT (4.2L, LH engine)
- ✔ 2006 GMC Envoy & Envoy XL (4.2L, LH engine)
- ✔ 2006 Isuzu Ascender (4.2L, LH engine)
- ✔ 2006 Isuzu i-280 / i-350 (RH firewall)
- ✔ 2006 Saab 9-7X (6 cylinder, LH engine)
Frequently Asked Questions
Frequently Asked Questions
What information do you need to program my PCM?
We need your vehicle’s 17-digit Vehicle Identification Number (VIN). Please provide it during or after checkout so we can flash the module with the correct software for your H3.
Is this module ready to install when I receive it?
Yes, it arrives pre-programmed to your VIN. In most cases, it is a direct installation, though a simple security relearn procedure (as outlined above) is sometimes required.
Will this 2006 HUMMER H3 PCM fix my specific problem?
This module corrects issues directly caused by a faulty PCM, such as internal failure codes (P0601-P0606), communication errors, and erratic engine/transmission behavior stemming from the computer. Proper vehicle diagnosis is always recommended.
Where is the PCM located on my 2006 Hummer H3?
The PCM is located in the engine compartment, mounted to the right-hand (passenger side) firewall.
Is any additional programming needed at a dealership?
No. Our service handles the programming, saving you the time, towing fees, and high costs associated with dealer-level programming.