End the Guesswork and Get Your Trailblazer Running Right
There’s nothing more frustrating than an engine that won’t cooperate. Whether you’re dealing with a persistent Check Engine light, rough idling, stalling, or a vehicle that simply won’t start, a faulty Powertrain Control Module (PCM) is often the hidden culprit. It’s the brain of your engine, and when it fails, it can cause a cascade of confusing problems. This isn’t just an inconvenience; it’s a matter of reliability and peace of mind. You deserve a vehicle you can count on, every single time you turn the key.
This is your direct, hassle-free solution. We provide a professionally prepared PCM, loaded with the latest official GM software updates and programmed specifically to your vehicle’s unique Vehicle Identification Number (VIN). This critical step ensures seamless communication between all your vehicle’s systems, restoring the smooth performance and efficiency you’ve been missing. Forget about expensive trips to the dealership for programming—this module arrives at your door ready for a straightforward installation.
A Technician’s Note: The “Phantom Problem” Fix
I once worked with a customer who had spent months and hundreds of dollars chasing what seemed like a transmission issue in his Envoy. He replaced sensors and solenoids, but the harsh shifting and hesitation remained. The real issue? A failing PCM was sending incorrect signals. Once we installed a VIN-programmed module like this one, the truck drove like it was new. Sometimes, the most complex-seeming problems have a simple, central solution.
Warning Signs Your PCM Needs Attention
If your vehicle is experiencing any of the following, a failing computer could be the cause. This replacement 2006 Trailblazer PCM is designed to correct these exact issues:
- ✔ Persistent Check Engine Light (CEL)
- ✔ Diagnostic Trouble Codes (DTCs) such as P0601, P0602, P0606, or other communication errors
- ✔ Unexplained drop in fuel economy
- ✔ Engine stalling, stumbling, or hesitating during acceleration
- ✔ Harsh or erratic automatic transmission shifting
- ✔ Failure to pass emissions testing
- ✔ Complete no-start condition where the engine cranks but won’t fire
Guided Installation to Restore Peace of Mind
Getting your truck back to peak condition is easier than you think. With our pre-programmed module, you’re just a few simple steps away from a successful repair. No special tools are required.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning any work on the electrical system.
- Locate the Module: On your 2006 Trailblazer, the PCM is typically found in the engine bay on the driver’s side, near the firewall.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that need to be released. Once disconnected, unbolt the old module from its mounting bracket.
- Install the New PCM: Mount your new, VIN-programmed PCM onto the bracket and securely plug in the wiring harnesses. You’ll hear a click as they lock into place.
- Reconnect and Start: Reconnect the negative battery terminal. Your vehicle may require a simple security relearn procedure, which typically involves turning the key to the ‘ON’ position for 10-15 minutes. Start the engine and enjoy the restored performance!
Tailored Fit for Your Ride
This module is a guaranteed fit for the following vehicles and part numbers. Providing your VIN during checkout is essential for us to deliver a perfectly matched and updated computer for your specific 2006 Trailblazer PCM requirements.
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
Vehicle Fitment:
- 2004-2006 CHEVROLET COLORADO (RH firewall)
- 2006 BUICK RAINIER (LH engine, 4.2L)
- 2006 HUMMER H3 (RH firewall)
- 2006 ISUZU ASCENDER (4.2L, LH engine)
- 2006 ISUZU I-350 (RH firewall)
- 2006 CHEVROLET TRAILBLAZER (4.2L, LH engine)
- 2006 CHEVROLET TRAILBLAZER EXT (4.2L, LH engine)
- 2006 GMC ENVOY XL (4.2L, LH engine)
- 2006 ISUZU I-280 (RH firewall)
- 2006 SAAB 9-7X (6 cylinder, LH engine)
- 2004-2006 GMC CANYON (RH firewall)
- 2006 GMC ENVOY (4.2L, LH engine)
Your Questions, Answered
Is this module really plug-and-play?
Yes! Because we program the module to your vehicle’s specific VIN before shipping, it arrives ready to be installed without needing a trip to the dealer. In some cases, a simple ‘key-on’ security relearn procedure may be necessary, which you can easily do yourself.
How do I provide my VIN?
After you complete your purchase, you will receive instructions on how to send us your vehicle’s 17-digit VIN. We cannot ship your order until we receive this information, as it is essential for programming.
Will this fix my specific problem?
This PCM is designed to resolve issues directly caused by a failing computer, such as internal processor faults (e.g., DTC P0606) and communication errors. While it fixes a wide range of common symptoms, we always recommend a proper diagnosis to confirm the PCM is the root cause of your issue.
What if I have an anti-theft system?
Our programming accounts for the factory anti-theft system (Passlock/VATS). The security relearn procedure mentioned in the installation guide will sync the new PCM with your vehicle’s security system, allowing it to start and run correctly.
Do you need my old PCM back?
This purchase does not require a core return. You can keep your old module, which saves you the time and expense of shipping it back.