Is your 2006 GMC Envoy XL feeling sluggish, shifting erratically, or refusing to start? A persistent Check Engine Light can be a constant source of worry, turning every drive into a guessing game. You don’t have to put up with the frustration. This Powertrain Control Module (PCM) is the heart of your vehicle’s operation, and we’ve made replacing it simpler than ever. It arrives at your doorstep fully programmed to your vehicle’s unique VIN, eliminating the need for expensive dealership trips and complex programming tools. Restore the smooth, reliable performance you depend on and get back to driving with confidence.
Warning Signs and How to Overcome Them
If you’re noticing any of the following, a failing PCM could be the culprit. This replacement is designed to resolve these exact issues:
- ✔ Unexplained Check Engine Light illumination
- ✔ Diagnostic Trouble Codes (DTCs) like P0601, P0606, or other communication errors
- ✔ Rough or inconsistent engine idle
- ✔ Poor fuel economy that slowly drains your wallet
- ✔ Harsh or delayed transmission shifting
- ✔ Intermittent or complete no-start conditions
- ✔ Stalling or hesitation during acceleration
Guided Installation to Restore Peace of Mind
You can do this. With basic hand tools and a little patience, you can have your Envoy running right again. Follow these simple steps:
- Safety First: Always disconnect the negative terminal on your vehicle’s battery before starting any electrical work.
- Locate the Old Unit: On your Envoy, the PCM is typically found in the engine bay, on the driver’s side, attached to the inner fender or firewall.
- Disconnect and Remove: Carefully unplug the wiring harness connectors. They have locking tabs, so be gentle. Then, unbolt the module from its mounting bracket.
- Install the New PCM: Mount your new, VIN-programmed PCM in the same location. Securely reconnect the wiring harnesses, ensuring they click into place.
- Power Up: Reconnect the negative battery terminal.
- Perform Security Relearn: Your vehicle will likely need a simple key-cycle procedure to sync with the new module. This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then ‘OFF’, and repeating two more times before starting the engine.
A Mechanic’s Note: The Trailblazer’s Second Chance
I remember a customer with a Trailblazer—the Envoy’s close cousin—that had been to three other shops. It had a ghost-in-the-machine issue: stalling randomly at stoplights. No one could figure it out. They were ready to sell the truck for scrap. We traced it back to a failing PCM that was overheating intermittently. Installing a pre-programmed unit like this one was the final fix. Seeing the owner’s relief and knowing they could trust their family vehicle again is why I do this. This isn’t just a part; it’s the key to getting your dependable truck back.
Tailored Fit for Your GM Truck or SUV
This module is a direct replacement for part number 12588650 and is compatible with a wide range of vehicles. Please verify your model and engine below. Providing your VIN at checkout is essential for perfect programming.
Understanding the 2006 Envoy XL PCM Solution
This computer is engineered to work seamlessly with the following models:
- 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 & i-350: 2006
- Saab 9-7x: 2006 (6-cylinder)
Also fits part numbers: 12569773, 12589311, 12589585, 12591647, 12591648, 12593531, 12593532, 12594430, 12594431, 12596783, 12596784, 12597521, 12597776, 12597777, 12600818, 12604438, 12604439, 12606369, 12606373, 12606374, 12606398, 12606399, 19209820, 19209821
Your Questions, Answered
Why do you need my VIN?
Your Vehicle Identification Number (VIN) allows us to flash the module with the exact software and calibrations your 2006 Envoy XL PCM requires. This ensures all systems, from the engine to the transmission, function precisely as the manufacturer intended, making installation a plug-and-play process.
Is any additional programming needed after installation?
No dealership programming is required. The only step you’ll need to perform is a security relearn procedure, which involves a simple key cycle process that you can easily do in your driveway. This syncs the new module to your vehicle’s anti-theft system.
Will this fix my transmission shifting problems?
In many cases, yes. The PCM controls both engine and transmission functions. If the module is sending faulty signals, it can cause harsh shifting, hesitation, or incorrect gear selection. Replacing a failing PCM often resolves these communication-based transmission issues.
How do I find my VIN?
Your 17-digit VIN is easy to find. It’s typically located on a metal plate on the driver’s side of the dashboard (visible through the windshield), on the driver’s side door jamb sticker, or on your vehicle’s registration and insurance documents.
What if I have questions during installation?
We’re here to help. Our team of experienced technicians is available to provide support and guidance. Your success is our priority, and we want to ensure your repair goes smoothly from start to finish.