Restore Peak Performance to Your GM SUV or Truck
Is your 2006 GMC Envoy XL, Trailblazer, or other compatible GM vehicle running rough, stalling, or throwing confusing check engine light codes? A failing Powertrain Control Module (PCM), the central computer of your engine, is often the culprit behind these frustrating and hard-to-diagnose issues. Instead of facing a costly and time-consuming trip to the dealership, get the perfect solution delivered to your door. This PCM is professionally programmed with the latest official GM software updates, specifically matched to your vehicle using your VIN. This ensures a seamless installation and restores the precise engine and transmission performance you’ve been missing.
From the Diagnostic Bay: A Tricky Trailblazer Case
I remember a 2006 Trailblazer 4.2L that came into my shop with a laundry list of intermittent problems: random stalling at idle, hard shifting from 1st to 2nd, and a flickering check engine light with no consistent codes. The owner had already replaced the throttle body and a couple of sensors with no luck. After hooking up my high-level scanner, I noticed the live data stream would occasionally freeze and drop out. This pointed directly to a communication breakdown originating from the PCM itself. We installed a VIN-programmed module just like this one, and it was like a new truck. All the ghost-like issues vanished instantly. It’s a classic example of how a failing 2006 Envoy XL Powertrain Control Module can mimic a dozen other problems.
Is Your SUV Showing These Telltale Signs?
A failing PCM can cause a wide range of symptoms. If you’re experiencing any of the following, this module is the likely solution:
- ✔ Check Engine Light is on with codes like P0601, P0606, or other internal processor faults.
- ✔ Unexplained drop in fuel economy.
- ✔ The engine cranks but refuses to start.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Communication errors with diagnostic scan tools.
- ✔ Stalling, stumbling, or rough idling for no apparent reason.
- ✔ Apparent failure of multiple sensors at once.
A Straightforward Guide to Installation
This module is designed for a direct, hassle-free replacement. While professional installation is always an option, a confident DIYer can handle this job with basic hand tools. For the 2006 Envoy XL and other 4.2L models, the PCM is typically located on the driver’s side of the engine.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and wait 10 minutes for the system to fully discharge.
- Locate the PCM: Find the module on the driver’s side of the engine block. It will have several large electrical connectors attached.
- Disconnect Connectors: Carefully release the locking tabs on each electrical harness connector and pull them straight out. Avoid pulling on the wires themselves.
- Remove the Old Module: Unbolt the mounting brackets holding the old PCM in place and remove it from the vehicle.
- Install the New Module: Mount your new, pre-programmed PCM in the same location and secure it with the original bolts.
- Reconnect Everything: Firmly plug in all the electrical connectors until they click into place. Reconnect the negative battery terminal.
- Final Step: Turn the key to the ‘ON’ position (without starting the engine) for 10-15 seconds to allow the system to initialize. Your vehicle is now ready to start.
Verified Vehicle Compatibility
This 2006 Envoy XL Powertrain Control Module is a direct-fit replacement for a wide range of GM vehicles. We guarantee compatibility if your vehicle is on this list and your original part number matches one of the numbers below.
Fits 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: 2006
- Isuzu i-350: 2006
- Saab 9-7x: 2006 (6 Cylinder)
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
Frequently Asked Questions
How does the VIN programming work?
After you place your order, you will need to provide us with your vehicle’s 17-digit VIN. We use this to access the latest GM software and flash the module specifically for your vehicle’s factory configuration. This ensures it works correctly right out of the box.
Do I need to do any additional programming or a security relearn?
In most cases, no. Because we program the module to your VIN, it is a true plug-and-play installation. The vehicle’s security system should recognize the new module automatically after the initial key-on cycle.
Is this a new or used part?
This is a high-quality, inspected, and tested recycled OEM part. Each unit is verified to be fully functional before being programmed with fresh, vehicle-specific software, offering OEM reliability at a fraction of the cost.
Where do I find my vehicle’s VIN?
Your VIN can be found on your vehicle’s registration, insurance card, or on a small plate on the driver’s side of the dashboard, visible through the windshield.
What if my original part number isn’t 12569773?
Please check the extensive list of compatible part numbers provided above. GM often uses many different numbers for the same component. As long as your old part number is on our list, this module will be a correct replacement for your vehicle.