Restore Your Envoy’s Performance and Reliability
Is your 2006 GMC Envoy XL running rough, shifting erratically, or plagued by an illuminated Check Engine Light? A failing Powertrain Control Module (PCM) is often the culprit, leaving you stranded and frustrated. This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take a genuine OEM module and flash it with the latest, most stable GM-certified software, specifically programmed to your vehicle’s unique Vehicle Identification Number (VIN). This ensures seamless communication between your engine and transmission, restoring the smooth performance and dependability you count on.
Common Symptoms of a Failing PCM & Your Solution
If you’re experiencing any of the issues below, a faulty computer is the likely cause. This pre-programmed module is the definitive fix for these frustrating problems, saving you a costly trip to the dealership. Stop guessing and get the right part the first time. The most common indicators include:
- Persistent Check Engine Light (CEL)
- Diagnostic Trouble Codes (DTCs) like P0601, P0606, or U-series communication codes
- Harsh or unpredictable transmission shifting
- Reduced fuel economy
- Engine stalling, stumbling, or misfiring
- Complete no-start condition
By installing our expertly programmed 2006 Envoy XL PCM 12589311, you’re not just clearing codes—you’re addressing the root cause and giving your vehicle a new lease on life.
Features & Benefits
- ✔ VIN-Specific Programming: We flash this module with the latest GM software updates using your vehicle’s VIN. This ensures perfect compatibility with your specific options and systems—no generic programming here.
- ✔ Simple, No-Hassle Installation: Because the programming is done before we ship, this unit is ready to be installed right out of the box. In most cases, a simple security relearn procedure is all that’s needed to get you back on the road.
- ✔ Restored Drivability: Eliminate rough idle, poor shifting, and hesitation. This module restores crisp engine response and smooth transmission operation.
- ✔ Cost-Effective Solution: Avoid the high costs and long wait times associated with dealership repairs. We provide a dealership-quality part and service at a fraction of the price.
- ✔ Peace of Mind: This unit is backed by our one-year replacement warranty. Drive with confidence knowing your purchase is protected.
An Expert’s Note on GM’s 4.2L Atlas Engine
The 4.2L inline-6 engine in your Envoy is a fantastic motor, but its performance is deeply tied to the health of the PCM. This computer precisely controls everything from fuel injection and spark timing to the complex variable valve timing (VVT) system. When the PCM starts to fail, it can’t make the micro-adjustments needed for peak efficiency and power, leading to the frustrating symptoms you’re likely experiencing. Installing a properly programmed 2006 Envoy XL PCM 12589311 is the single most effective way to ensure this robust engine operates exactly as its engineers intended.
This module is a direct fit for a wide range of GM vehicles and is interchangeable with multiple part numbers, including 12569773, 12588650, 12591647, 12604438, and more. After purchasing, simply provide us with your VIN, and we’ll handle the rest, ensuring the 2006 Envoy XL PCM 12589311 you receive is the perfect match for your truck.
Frequently Asked Questions
Do I need to do anything after installing the module?
In most cases, you will need to perform a security relearn procedure, also known as a VATS relearn. This is a simple process that can be done without any special tools and typically takes about 30 minutes. It allows the new PCM to recognize your vehicle’s anti-theft system and keys. We include instructions to guide you through this step.
Where do I provide my vehicle’s VIN?
After you complete your purchase, you can send us your 17-digit VIN through the messaging system or include it in the ‘notes to seller’ section during checkout. We cannot program and ship your module without it.
How do I know if this is the correct part number for me?
This module replaces a long list of original part numbers. As long as your vehicle’s year, make, and model are on our compatibility list, this is the correct computer for you. Our VIN-specific programming ensures it will function correctly, regardless of which original part number you had.
What’s the difference between a PCM, ECM, and ECU?
The terms are often used interchangeably. ECM (Engine Control Module) and ECU (Engine Control Unit) typically refer to a computer that only controls engine functions. A PCM (Powertrain Control Module) is more integrated and controls both the engine and the transmission. Your 2006 Envoy XL uses a PCM.
Is any special ‘case learn’ or crankshaft variation relearn required?
While not always necessary to get the vehicle running, a crankshaft variation relearn (CASE learn) is recommended for optimal performance and to prevent a P1336 trouble code. This procedure requires a compatible professional scan tool and is best performed by a qualified mechanic after installation.