Restore Peak Performance to Your 2006 GMC Envoy XL
Is your 2006 GMC Envoy XL suffering from frustrating and unpredictable issues like a persistent check engine light, poor fuel economy, rough idling, or erratic transmission shifting? These are common indicators that the vehicle’s central computer, the Powertrain Control Module (PCM), is failing. The PCM is the electronic brain of your Envoy, meticulously managing everything from the air-fuel mixture and ignition timing to transmission shift points and emissions systems. When it begins to malfunction, it can cause a cascade of problems that are often misdiagnosed, leading to costly and unnecessary repairs.
Don’t let a faulty computer keep your reliable SUV off the road. This is a direct-fit replacement Powertrain Control Module for your vehicle, identified by part number 12596783 and its interchanges. We take the guesswork out of the repair by pre-programming the module specifically for your vehicle using your unique Vehicle Identification Number (VIN). This ensures that the unit arrives ready for installation, loaded with the latest software updates from GM for optimal performance and efficiency.
From the Diagnostic Bay
We had a 2006 Envoy XL come into the shop with a persistent random misfire code (P0300) that just wouldn’t go away. The owner had already replaced the spark plugs, ignition coils, and even a few fuel injectors, but the rough idle and check engine light always returned. After hours of diagnostics, we traced the issue to the PCM itself. The driver circuit for one of the ignition coils was intermittently failing. Once we installed a VIN-programmed PCM, the engine smoothed out immediately, and the P0300 code never came back. It’s a classic case where the root cause was the computer, not the components it controls.
Your Direct Solution: The 2006 Envoy XL PCM
Choosing the right PCM is critical. Our process ensures you receive a fully functional module that seamlessly integrates with your Envoy XL. By providing your VIN during checkout, you guarantee that the software calibration loaded onto the module is an exact match for your vehicle’s specific configuration, including its engine, transmission, and emissions equipment. This eliminates compatibility issues and the need for expensive programming at a dealership. This module is the definitive solution for restoring the precise, factory-spec operation of your vehicle’s powertrain.
Symptoms of a Failing 2006 Envoy XL PCM
- ✔ Persistent Check Engine Light (CEL) that won’t clear.
- ✔ Unexplained drop in fuel mileage.
- ✔ Engine stalling, stumbling, or hesitating during acceleration.
- ✔ Rough or erratic engine idle.
- ✔ Harsh, delayed, or incorrect transmission shifting.
- ✔ The vehicle fails to start, even with a good battery and starter.
- ✔ Multiple unrelated diagnostic trouble codes (DTCs) are present.
- ✔ Communication errors with diagnostic scan tools.
Simple Installation Process
Installation is straightforward for anyone with basic mechanical skills. The PCM is typically located in the engine bay. After disconnecting the battery, you simply unplug the electrical connectors from the old module, unbolt it, and install the new one in its place. Once the new module is connected and the battery is reconnected, you may need to perform a simple security relearn procedure, also known as a CASE (Crankshaft Angle Sensor Error) relearn. This procedure can often be completed without special tools and is necessary to sync the new PCM with your vehicle’s anti-theft system. Detailed instructions are readily available online for this common procedure.
This module is a direct replacement for the following 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
Why do you need my vehicle’s VIN?
Your VIN (Vehicle Identification Number) is essential for us to load the correct GM-certified software and calibrations onto the PCM. This ensures the module is perfectly matched to your Envoy’s specific engine, transmission, and options, making it a true plug-and-play solution.
Is this module difficult to install?
Installation is a simple bolt-in, plug-in process. The only additional step is a potential security relearn procedure, which syncs the new PCM to your vehicle’s anti-theft system. This can typically be done in your driveway without any specialized tools.
Will this fix my check engine light and other issues?
If your vehicle’s symptoms and diagnostic codes point to a faulty PCM, this replacement module is the correct solution. It is designed to resolve issues directly caused by a failing computer, such as false sensor readings, communication errors, and incorrect engine management.
What happens if I don’t provide a VIN?
We cannot ship the module without a VIN. The programming is a critical part of the service that ensures the part will function correctly in your specific vehicle. An order placed without a VIN will be held until one is provided.
Is this compatible with other GM trucks and SUVs?
Yes, this PCM fits a range of GM vehicles from 2004-2006, including the Trailblazer, Rainier, Colorado, Canyon, Hummer H3, and Isuzu Ascender equipped with the 4.2L inline-6 or other specified engines. Please check the detailed fitment list on this page to confirm compatibility.