Restore Your Hummer’s Performance and Reliability
If you’re dealing with a frustrating check engine light, erratic engine behavior, or a no-start condition in your 2006 Hummer H3, a failing Powertrain Control Module (PCM) is often the culprit. As the central computer for your engine and transmission, its health is critical. This isn’t just a replacement part; it’s a direct solution, programmed specifically for your vehicle using your VIN. We install the latest GM-certified software, ensuring your engine runs at peak efficiency and all factory drivability improvements are applied. Stop chasing phantom sensor codes and address the root of the problem with a reliable, ready-to-install 2006 HUMMER H3 PCM.
A Straightforward PCM Installation for Your Hummer H3
- ✔ Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- ✔ Locate the Module: On the 2006 Hummer H3, the PCM is located on the right-hand (passenger) side of the firewall in the engine bay.
- ✔ Disconnect Connectors: Carefully unclip and remove the wiring harness connectors from the old PCM. Inspect the connectors for any corrosion or bent pins.
- ✔ Remove the Old PCM: Unbolt the module from its mounting bracket on the firewall. It’s typically held by a few small bolts.
- ✔ Install the New PCM: Mount your new, pre-programmed PCM onto the bracket and securely fasten it.
- ✔ Reconnect Everything: Plug the wiring harnesses firmly into the new module. Reconnect the negative battery terminal.
- ✔ Perform Security Relearn: You will need to perform a simple key-cycle 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. Instructions will be provided.
Case Study: A Tricky Diagnosis
I had a 2006 Chevy Colorado (which shares this exact PCM) come into the shop with an intermittent stalling problem that no one could figure out. The owner had already replaced the fuel pump and a couple of sensors. The truck would run fine for days, then suddenly die at a stoplight. No consistent codes were stored, just a generic U0100 ‘Lost Communication’ code every once in a while. After checking all the grounds and wiring, we suspected the PCM. On the bench, we found a microscopic crack in a solder joint that would expand when hot, breaking the circuit. We installed one of our pre-programmed PCMs, and the truck has been running perfectly for over a year. Sometimes, the ‘brain’ itself is the issue, not the parts it’s connected to.
Is Your H3 Showing These PCM Failure Signs?
A faulty 2006 HUMMER H3 PCM can cause a wide range of issues that might seem unrelated. If you’re experiencing any of the following, your PCM is a likely suspect:
- ✔ Persistent Check Engine Light (CEL) that won’t clear
- ✔ Diagnostic Trouble Codes (DTCs) related to internal module failure, like P0601, P0602, or P0606
- ✔ Vehicle won’t start or has difficulty starting
- ✔ Rough idling, engine stalling, or misfires
- ✔ Poor fuel economy and decreased engine power
- ✔ Harsh or erratic automatic transmission shifting
- ✔ Inability for a scan tool to communicate with the PCM
Verified Vehicle Compatibility List
This module is a direct-fit replacement for the original PCM in a wide range of GM vehicles. We program it specifically for your VIN to ensure perfect function. It is compatible with the following models and part numbers:
- 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 & i-350: 2006
- Saab 9-7X: 2006 (6-cylinder models)
This part replaces numerous original equipment numbers, including: 12569773, 12588650, 12591647, 12593532, 12594430, 12596783, 12597521, 12600818, 12606373, 19209820, 19209821, and more.
Frequently Asked Questions
Frequently Asked Questions
How does the programming process work?
It’s simple. After you complete your purchase, you’ll provide us with your vehicle’s 17-digit VIN. Our technicians use this VIN to flash the module with the latest, correct GM software for your H3’s specific configuration before we ship it.
Do I need to take my vehicle to a dealer after installation?
No. Because this 2006 HUMMER H3 PCM arrives pre-programmed, you will not need a trip to the dealership for programming. You will only need to perform a simple security relearn procedure, which we provide instructions for.
Is this a plug-and-play part?
Essentially, yes. Once you perform the security relearn, the module is ready to go. The programming is handled by us, so there are no special tools or software required on your end.
What happens if I don’t provide my VIN?
We cannot ship the module without your VIN. The programming is essential for the part to function correctly in your vehicle. We will hold the order and contact you to get the necessary information.
What if my part number isn’t on the list but my vehicle is?
The provided list covers the most common part numbers. GM often supersedes numbers over time. As long as your vehicle is a 2006 Hummer H3, this module, once programmed to your VIN, is the correct replacement.