Restore Peak Performance to Your 2006 GMC Envoy XL
Is your 2006 GMC Envoy XL running rough, stalling unexpectedly, or displaying a persistent Check Engine Light? These are classic signs of a failing Powertrain Control Module (PCM), the central computer that manages your vehicle’s engine and transmission. A faulty PCM can disrupt everything from fuel delivery and ignition timing to transmission shift points, leading to a frustrating and unreliable driving experience. This replacement module is the definitive solution to get your Envoy XL back to factory-spec operation.
This unit is not just a replacement part; it’s a fully integrated solution. We program the module specifically to your vehicle’s unique Vehicle Identification Number (VIN) before it ships. This crucial step ensures that the computer has the correct software and calibrations for your Envoy XL’s specific configuration, including the 4.2L engine. By installing the latest GM-certified software updates, we help resolve many known drivability issues and improve overall efficiency, ensuring a seamless, plug-and-play installation process.
From the Diagnostic Bay
I once had a 2006 Trailblazer (which shares this exact PCM with the Envoy XL) come into the shop with a no-start condition. The owner had already replaced the battery and alternator. His scanner was showing a U0100 ‘Lost Communication with ECM/PCM’ code. Before condemning the module, I always check the basics. I found a corroded ground wire on the engine block, just below the PCM. After cleaning the connection point and re-securing the ground, the truck fired right up. It’s a vital reminder: always verify power and ground connections to the PCM before replacing it. A few minutes with a multimeter can save you hundreds of dollars.
Is Your Envoy XL Showing These Symptoms?
- ✔ Persistent Check Engine Light (CEL) with communication error codes (e.g., U-codes) or performance codes.
- ✔ Unexplained stalling or engine hesitation, especially when warm.
- ✔ Rough or erratic idling that doesn’t improve with a standard tune-up.
- ✔ Harsh or delayed transmission shifting.
- ✔ A significant drop in fuel economy (MPG).
- ✔ The engine cranks but refuses to start, even with a good battery and fuel pressure.
- ✔ Failure to pass state emissions testing due to readiness monitor issues.
The Simple, Reliable Solution: A Programmed 2006 Envoy XL PCM
Don’t let a faulty computer keep your reliable SUV off the road. Our process is designed for simplicity and effectiveness. When you place your order, you provide us with your VIN. Our technicians then flash this specific module with the latest, most stable software directly from GM’s database. This ensures complete compatibility and eliminates the need for an expensive trip to the dealership for programming. The module arrives at your door ready for installation. In most cases, you will only need to perform a simple security relearn procedure, which can be done without any special tools right in your driveway.
This PCM is a direct-fit replacement for a wide range of original equipment part numbers, including 12589311, 12569773, 12597521, and many others listed in the fitment data. It is compatible with the 2006 GMC Envoy and Envoy XL, as well as several other GM models like the Trailblazer, Rainier, Hummer H3, and Isuzu Ascender equipped with the 4.2L inline-6 engine. Please verify your part number or contact us with your VIN to confirm an exact match.
Frequently Asked Questions
Do I need to have this programmed by a dealer?
No. This module comes pre-programmed to your vehicle’s specific VIN. We handle all the flashing and software updates before shipping, so you don’t need to visit a dealership for programming services.
What is a security relearn procedure?
The security relearn, or anti-theft relearn, syncs the new PCM with your vehicle’s existing anti-theft system. It’s a simple procedure that typically involves turning the key to the ‘ON’ position for 10-15 minutes, then ‘OFF’, and repeating this cycle three times. Instructions are readily available online for your specific model.
Where do I provide my VIN?
You can provide your 17-digit VIN during the checkout process or send it to us in a message after placing your order. We cannot program and ship the module without your vehicle’s VIN.
Is this a brand new part?
This is a high-quality, inspected replacement part that has been tested and prepared for service. It is programmed with new, updated software to ensure reliability and performance that meets or exceeds the original factory specifications.
Will this fix my transmission shifting problems?
In many cases, yes. The PCM controls the transmission’s electronic solenoids and shift logic. If your shifting issues are caused by faulty computer signals, this replacement module will resolve them. However, it will not fix internal mechanical failures within the transmission itself.