Restore Peak Performance to Your GM SUV
Is your Trailblazer, Envoy, or Rainier suffering from frustrating issues like a persistent check engine light, erratic shifting, or a no-start condition? These are classic signs of a failing Powertrain Control Module (PCM), the electronic brain of your vehicle. Don’t let a faulty computer keep you off the road or facing a massive dealership repair bill. This professionally programmed PCM is the definitive solution, designed to restore your vehicle’s original performance, reliability, and fuel efficiency with unparalleled ease.
We take all the guesswork and complexity out of the repair. Simply provide your vehicle’s VIN during checkout, and our experts will flash this module with the latest, most stable GM software specific to your SUV. It arrives at your door ready for a simple, plug-and-play installation, getting you back behind the wheel with confidence.
Warning Signs and How to Overcome Them
A failing PCM can manifest in numerous ways. If you’re experiencing any of the following, this module is the solution you need:
- ✔ Persistent Check Engine Light (CEL) that won’t go away.
- ✔ Diagnostic Trouble Codes (DTCs) such as P0601, P0606, or other communication errors.
- ✔ Unexplained drop in fuel economy.
- ✔ Harsh or unpredictable automatic transmission shifting.
- ✔ Engine stalling, sputtering, or refusing to start.
- ✔ Failure to pass state emissions testing.
- ✔ The confidence of a smooth, reliable, and responsive driving experience.
A Mechanic’s Story: From Dealership Frustration to DIY Success
“I had a customer bring in their ’06 Trailblazer. It was running rough, and the transmission was shifting hard. The dealership had quoted them over a thousand dollars for a new PCM plus programming. They were heartbroken. I recommended this exact programmed module. It arrived two days later, I spent 15 minutes swapping it out, and the truck ran like it just rolled off the factory floor. The customer saved a fortune and regained trust in their vehicle. That’s what a quality part does—it doesn’t just fix a problem, it restores peace of mind.”
Guided Installation for a Confident Fix
You don’t need to be a master mechanic to complete this job. With our pre-programmed module, the process is straightforward. Follow these steps for a successful installation:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait at least 10 minutes to allow the system to fully discharge.
- Locate the Old Module: On most of these vehicles (like the Envoy and Trailblazer), the PCM is located on the driver’s side of the engine bay, near the firewall.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that need to be released. Once disconnected, unbolt the module from its mounting bracket.
- Install the New PCM: Mount your new, pre-programmed 2006 Envoy Powertrain Control Module in the same location. Securely reconnect the electrical harnesses, ensuring they click into place.
- Reconnect Power: Reattach the negative battery terminal and tighten it securely.
- Final Steps: In some cases, a security relearn procedure (often called CASE relearn) may be necessary. This is a simple process you can often do yourself, and instructions are widely available for your specific model. Start the vehicle and enjoy its restored performance!
Tailored Fit for Your Ride
This module is a direct replacement for part number 12569773 and is compatible with a wide range of GM vehicles. Please verify your model and engine below:
- Buick Rainier: 2006 (4.2L)
- Chevrolet Colorado: 2004-2006
- Chevrolet Trailblazer & Trailblazer EXT: 2006 (4.2L)
- GMC Canyon: 2004-2006
- GMC Envoy, Envoy XL: 2006 (4.2L)
- Hummer H3: 2006
- Isuzu Ascender: 2006 (4.2L)
- Isuzu i-280: 2006
- Isuzu i-350: 2006
- Saab 9-7x: 2006 (6 cylinder)
This unit is a direct replacement for multiple part numbers, including: 12588650, 12589311, 12591647, 12597521, 12604438, 19209820, and more. Your investment in a quality 2006 Envoy Powertrain Control Module ensures your vehicle operates as its engineers intended.
Frequently Asked Questions
Is this module truly plug-and-play?
Yes! We program the module using the VIN you provide, loading it with the correct software for your vehicle’s specific options. This eliminates the need for expensive dealer-only programming tools. In some cases, a simple security or crankshaft variation relearn procedure may be required after installation.
Where do I provide my VIN?
You can enter your 17-digit Vehicle Identification Number (VIN) during the checkout process. Please double-check it for accuracy, as this is critical for correct programming.
What if I install it and still have problems?
While this module fixes the vast majority of PCM-related issues, it’s important to ensure your vehicle’s underlying mechanical and electrical systems are sound. Our team of experienced technicians is here to help you diagnose any persistent issues after installation.
Does this part come with a warranty?
Absolutely. We stand behind our work. This part comes with a comprehensive warranty, giving you complete peace of mind with your purchase. Please see the warranty tab for full details.
Will this fix my failed emissions test?
In many cases, yes. A faulty PCM can cause incorrect air-fuel mixtures and other issues that lead to emissions failures. Replacing a defective 2006 Envoy Powertrain Control Module is often the key to passing your inspection.