End the Guesswork and Get Back on the Road with Confidence
Is your 2006 GMC Envoy XL acting up? If you’re dealing with a persistent check engine light, erratic engine behavior, or frustrating transmission issues, the heart of the problem often lies with a failing Powertrain Control Module. Don’t let a faulty computer keep you sidelined. This replacement PCM is the definitive, reliable solution designed to restore your vehicle’s performance and your peace of mind. We take all the complexity out of the repair by programming the module specifically to your vehicle’s VIN before it ships. This means no expensive trips to the dealership for programming—just a straightforward installation to get your Envoy running like new again.
Warning Signs Your PCM is Failing & The Benefits of This Solution
A failing computer can cause a cascade of confusing symptoms. Here’s what to look for, and how this module provides the cure:
- ✔ Persistent Check Engine Light: Finally clear stubborn diagnostic trouble codes (DTCs) like P0601, P0602, P0606, or other internal controller errors.
- ✔ Poor Engine Performance: Eliminates issues like rough idling, stalling, hesitation during acceleration, and a noticeable drop in power.
- ✔ Reduced Fuel Economy: Restore your engine’s efficiency by ensuring the correct air-fuel mixture and timing.
- ✔ Erratic Automatic Transmission Shifting: Solves problems with harsh shifts, delayed engagement, or getting stuck in gear.
- ✔ Vehicle No-Start Condition: Fixes scenarios where the engine cranks but won’t start due to a lack of fuel or spark commands from the PCM.
- ✔ VIN-Specific Programming: Arrives ready for installation with the latest GM software updates, ensuring perfect communication with your vehicle’s other modules.
A Technician’s Two-Minute Diagnostic Tip
“Before you’re certain the PCM is the culprit, take two minutes to check your Envoy’s battery terminals and the main engine-to-chassis ground strap. A loose or corroded connection can cause low voltage, which makes a computer act erratically and can mimic the symptoms of a complete failure. Cleaning these connections is a simple step that has saved many customers from an unnecessary repair. If your connections are clean and tight and the problems persist, you can be confident the PCM is the next logical step.”
Guided Installation to Restore Your Envoy’s Health
Replacing the 2006 Envoy XL PCM is a manageable job for a DIYer with basic tools. Follow these steps for a confident repair.
- Safety First: Disconnect the Battery. Always begin by disconnecting the negative terminal of your vehicle’s battery to prevent any electrical shorts.
- Locate the Old PCM. On your Envoy, you’ll find the module in the engine bay, typically mounted on the driver’s side (LH) inner fender or firewall.
- Disconnect and Remove. Carefully unplug the large electrical connectors. They have locking tabs that need to be released. Once disconnected, unbolt the module from its mounting bracket.
- Install Your New Module. Seat the new, pre-programmed PCM onto the bracket and tighten the mounting bolts. Firmly reconnect the wiring harnesses, ensuring the locking tabs click securely into place.
- Power Up and Finalize. Reconnect the negative battery terminal. In many cases, the vehicle will start and run perfectly. However, some GM vehicles require a security relearn procedure (often called a Passlock or anti-theft relearn), which can typically be done without special tools. Instructions are widely available online or in your owner’s manual.
Tailored Fit for Your Ride
This module is a direct replacement for part number 12597777 and is guaranteed to be compatible with the following vehicles and options:
- Buick Rainier: 2006 (4.2L)
- Chevrolet Colorado: 2004-2006
- GMC Canyon: 2004-2006
- GMC Envoy: 2006 (4.2L)
- GMC 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)
- Chevrolet Trailblazer: 2006 (4.2L)
- Chevrolet Trailblazer EXT: 2006 (4.2L)
This unit replaces a wide range of original part numbers, including: 12569773, 12588650, 12589311, 12591647, 12597776, 12600818, 12606399, 19209820, and many more.
By choosing this pre-programmed 2006 Envoy XL PCM, you’re not just buying a part; you’re investing in a smooth-running, reliable vehicle and the satisfaction of a job done right. Place your order, provide your VIN, and get ready to enjoy a worry-free drive once again.
Frequently Asked Questions
What exactly does the PCM do?
The Powertrain Control Module (PCM) is the central computer of your vehicle. It controls all aspects of engine and transmission operation, from fuel injection and spark timing to transmission shift points, to ensure optimal performance, fuel economy, and emissions.
Is this part truly ‘plug and play’?
Yes! Because we program it with your vehicle’s specific VIN and the latest GM software updates before shipping, it is ready to be installed. In some cases, a simple security relearn procedure may be required after installation, which does not require special tools.
How do I give you my VIN?
After you complete your purchase, you will receive an email with instructions on how to send us your vehicle’s 17-digit VIN. We cannot ship your part until we receive this information, as the programming is essential.
Do I need to send my old module back?
No core charge or return is required for this part. You can recycle your old module locally.
Will this work if my vehicle has aftermarket modifications?
This module is programmed with standard factory calibration. It is designed for vehicles with original factory equipment and is not intended for vehicles with significant performance modifications like turbochargers, superchargers, or non-stock engine components.