Is Your GMC Envoy Experiencing Engine or Transmission Problems?
If your 2006 GMC Envoy, Trailblazer, or another compatible GM vehicle is suffering from erratic behavior, a persistent Check Engine Light, or a frustrating no-start condition, a failing Powertrain Control Module (PCM) is often the culprit. The PCM is the central computer of your vehicle, responsible for managing everything from fuel injection and ignition timing to transmission shift points. When it fails, it can cause a cascade of confusing and debilitating issues, leaving you stranded and facing a costly trip to the dealership.
This replacement Powertrain Control Module, part number 12606373, is the definitive solution to restore your vehicle’s performance and reliability. We take the guesswork and hassle out of the repair process. Before we ship your part, we flash it with the latest, most stable software updates directly from GM, programmed specifically to your vehicle’s unique Vehicle Identification Number (VIN). This ensures perfect compatibility and function right out of the box, eliminating the need for expensive dealer programming.
From the Diagnostic Bay
We had a 2006 Trailblazer 4.2L come into the shop that was driving the owner crazy. It would randomly stall at stoplights and sometimes refuse to start for hours. The check engine light was on with a P0601 code (Internal Control Module Memory Check Sum Error). After verifying the power and ground circuits to the module were solid, we knew the internal processor was failing. Instead of a complicated dealer visit, the customer opted for one of our pre-programmed modules. We provided the VIN, received the new unit, and installed it in under 20 minutes. After a quick security relearn procedure, the truck fired up instantly and ran perfectly. The code was gone, and the stalling issue never returned. It’s a textbook example of how a precisely programmed module can be a simple, effective fix.
Symptoms of a Failing 2006 Envoy Powertrain Module
- ✔ Persistent Check Engine Light with codes like P0601, P0606, or other communication errors.
- ✔ Unexplained engine stalling or stumbling, especially when warm.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Reduced fuel economy for no apparent reason.
- ✔ Complete no-start condition where the engine cranks but won’t fire.
- ✔ Inconsistent instrument panel gauge readings.
- ✔ Failure to pass state emissions testing.
A True Plug-and-Play Solution
Replacing your vehicle’s computer can seem daunting, but we make it straightforward. Because this module arrives programmed for your VIN, the installation is as simple as disconnecting the battery, swapping the old module for the new one, and reconnecting everything. In most cases, you will need to perform a simple security relearn procedure (often called a CASE learn or Passlock relearn), which can typically be done in your driveway without any special tools. This process syncs the new computer with your vehicle’s anti-theft system. This single component is a direct replacement for a wide range of part numbers, including 12569773, 12588650, 12591647, 12606369, and more, ensuring broad compatibility across many GM trucks and SUVs.
Don’t let a faulty computer dictate when and where you can drive. Take control of your repair with this reliable, professionally programmed 2006 Envoy Powertrain Module. It’s the smart, efficient way to get your vehicle back on the road and running like new.
Frequently Asked Questions
What does this Powertrain Control Module do?
The Powertrain Control Module (PCM), also known as an Engine Control Module (ECM), is the main computer that controls your vehicle’s engine and transmission. It processes data from dozens of sensors to manage fuel delivery, spark timing, emissions systems, and automatic transmission shifting to ensure optimal performance and efficiency.
Is this part difficult to install?
No, the physical installation is very simple. It typically involves disconnecting the vehicle’s battery, unplugging the electrical connectors from the old module, unbolting it, and then installing the new one in its place. The most important step after installation is the security relearn procedure, which can usually be done without special tools by following a specific sequence of key turns.
How do I provide my VIN for programming?
After you complete your purchase, we will contact you for your vehicle’s 17-digit VIN. You can also add it as a note during checkout. It is critical that you provide the correct VIN, as we use it to load the exact software and calibrations for your specific vehicle configuration.
Will this fix my check engine light?
If your check engine light is caused by an internal failure of the existing PCM (common codes include P0601, P0602, P0606), then this replacement module will resolve the issue. However, if the light is on due to a faulty sensor or another component, you will still need to address that separate problem.
Is this compatible with vehicles other than the 2006 Envoy?
Yes. This module is a direct replacement for many GM vehicles from 2004-2006, including the Chevrolet Colorado, GMC Canyon, Hummer H3, Isuzu Ascender, and Chevrolet Trailblazer equipped with the 4.2L inline-6 engine. Please check the fitment list in the description to confirm it matches your specific vehicle.