End the Guesswork and Get Back on the Road with Confidence
Is your Trailblazer suffering from a persistent check engine light, erratic shifting, or a frustrating no-start condition? The Powertrain Control Module (PCM) is the brain of your vehicle, and when it falters, it can cause a cascade of confusing and stressful problems. This isn’t just an inconvenience; it’s a matter of reliability and peace of mind. We offer the definitive solution: a professionally programmed PCM, flashed with the latest GM software and tailored specifically to your vehicle’s VIN. Forget the costly dealership visits and complex programming tools. This is the straightforward, dependable fix that puts you back in control.
Symptoms of a Failing PCM and the Benefits of a Reliable Fix
If you’re experiencing any of the following, a faulty computer could be the culprit. Replacing it with our correctly programmed module is the key to restoring your vehicle’s health.
- ✔ Persistent Check Engine Light: Finally clear stubborn codes like P0601, P0602, P0606, or other internal controller errors.
- ✔ Poor Engine Performance: Regain lost power, smooth out a rough idle, and eliminate hesitation or stalling.
- ✔ Inconsistent Shifting: Solve harsh or erratic automatic transmission shifting patterns controlled by the PCM.
- ✔ Reduced Fuel Economy: Restore your engine’s efficiency by ensuring the correct air/fuel mixture and timing.
- ✔ Failed Emissions Test: Get your vehicle back into compliance by fixing the root cause of emission system faults.
- ✔ Intermittent Starting Issues: Eliminate the worry of being stranded by ensuring the PCM is properly managing the starting sequence.
Your Guided Path to a Successful Installation
You don’t need to be a master mechanic to complete this job. With basic tools and a little patience, you can get your Trailblazer running right again. Follow these steps for a confident repair.
- Safety First: Begin by disconnecting the negative terminal on your vehicle’s battery to prevent any electrical shorts.
- Locate the Module: On your 2006 Trailblazer, the PCM is located in the engine compartment, typically on the driver’s side (LH engine).
- Disconnect with Care: Carefully unplug the electrical connectors from the old module. These connectors have locking tabs that need to be released before they can be pulled free. Avoid forcing them.
- Swap the Units: Unbolt the old PCM from its mounting bracket and set it aside. Mount your new, pre-programmed module in its place.
- Reconnect and Power Up: Firmly plug the wiring harnesses into the new PCM until they click into place. Reconnect your vehicle’s battery terminal.
- Perform the Security Relearn: Your vehicle’s anti-theft system needs to sync with the new PCM. This is a simple procedure, often called the “Passlock Relearn,” which typically involves turning the key to the ‘ON’ position for 10-15 minutes, then ‘OFF’, and repeating two more times before starting the engine. This final step is crucial for the engine to start and run.
Guaranteed Compatibility for Your 2006 Trailblazer PCM
This module is a direct-fit replacement for a range of GM trucks and SUVs. Please verify your vehicle is on the list below. After purchase, simply provide us with your VIN, and we’ll handle the programming to ensure a perfect match.
This part will fit these makes and models with these options:
- COLORADO 04-06 Electronic Control Module; (RH firewall)
- RAINIER 06 Electronic Control Module; (LH engine), 4.2L
- HUMMER H3 06 Electronic Control Module; (RH firewall)
- ISUZU ASCENDER 06 Electronic Control Module; 4.2L (LH engine)
- ISUZU I-350 06 Electronic Control Module; (RH firewall)
- TRAILBLAZER 06 Electronic Control Module; (LH engine), 4.2L
- TRAILBLAZER EXT 06 Electronic Control Module; (LH engine), 4.2L
- ENVOY XL 06 Electronic Control Module; (LH engine), 4.2L
- ISUZU I-280 06 Electronic Control Module; (RH firewall)
- SAAB 9-7X 06 Electronic Control Module; (LH engine), 6 cylinder, ID 12569773
- SAAB 9-7X 06 Electronic Control Module; (LH engine), 6 cylinder, ID 12597521
- CANYON 04-06 Electronic Control Module; (RH firewall)
- ENVOY 06 Electronic Control Module; 4.2L (LH engine)
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
What does ‘programmed to my VIN’ actually mean?
It means we load the specific software and calibrations from GM that are unique to your vehicle’s options, engine, transmission, and emissions equipment. This ensures the module works seamlessly with all other systems in your truck, just like the original one did from the factory.
Will I need to do any additional programming after I install it?
No additional programming or flashing is required. However, you will need to perform the vehicle’s security relearn procedure, which syncs the anti-theft system to the new PCM. This is a simple key-on/key-off process that you can do yourself in about 30 minutes.
Where is the PCM located on my 2006 Trailblazer?
The Powertrain Control Module on the 2006 Trailblazer with the 4.2L engine is located in the engine bay, on the driver’s side, attached to the inner fender or engine block area.
How do I provide you with my VIN?
After you complete your purchase, you can send us a message with your 17-digit Vehicle Identification Number (VIN). We cannot ship your part until we receive this information, as the programming is VIN-specific.
What if this part doesn’t solve my problem?
While this PCM is a common solution for many electronic issues, we always recommend a thorough diagnosis to confirm the PCM is the point of failure. If you install the part and your issue persists, it may indicate another underlying problem with wiring, sensors, or other components.