Restore Your Envoy’s Performance and Reliability
Is your 2006 GMC Envoy feeling sluggish, shifting erratically, or displaying a stubborn check engine light? These frustrating issues often point directly to a failing Powertrain Control Module (PCM), the electronic brain of your vehicle. Don’t let a faulty computer keep you off the road or stuck with a massive dealership repair bill. This direct-fit PCM is your solution, arriving at your doorstep fully programmed to your vehicle’s specific VIN with the latest GM software updates. It’s the key to regaining that smooth, responsive, and worry-free driving experience you remember.
Warning Signs and How to Overcome Them
A failing PCM can cause a wide range of confusing symptoms. If you’re experiencing any of the following, this module is the reliable fix you need:
- ✔ Persistent Check Engine Light (CEL) that won’t go away.
- ✔ Diagnostic Trouble Codes (DTCs) related to internal processor failure, such as P0601, P0602, P0604, or P0606.
- ✔ Unexplained stalling, rough idling, or difficulty starting the engine.
- ✔ Poor fuel economy and a noticeable loss of power.
- ✔ Harsh or delayed transmission shifting.
- ✔ Failure to pass state emissions testing.
An Expert’s Quick Diagnostic Tip
Before you’re certain the PCM is the culprit, take 15 minutes to check your battery and all major ground connections. A weak battery or a corroded ground strap (especially the one from the engine block to the chassis) can cause bizarre electronic symptoms that mimic PCM failure. A simple check with a multimeter can save you time and confirm your diagnosis. A solid 12.6V at the battery and clean, tight grounds are essential for any vehicle’s brain to function correctly.
Guided Installation to Restore Peace of Mind
Installing your new 2006 Envoy PCM is a straightforward process that most DIYers can handle with basic tools. Our goal is to empower you to complete the repair with confidence. Just follow these simple steps:
- Safety First: Begin by disconnecting the negative terminal of your vehicle’s battery to prevent any electrical shorts.
- Locate the Old PCM: On your 2006 Envoy, the PCM is typically found in the engine bay, mounted to the driver’s side of the engine block.
- Disconnect the Connectors: Carefully unlatch and remove the electrical wiring harness connectors from the old module. These connectors have release tabs that need to be pressed or lifted.
- Remove the Module: Unbolt the old PCM from its mounting bracket. It’s usually held in place by a few bolts.
- Install the New Unit: Mount your new, pre-programmed PCM onto the bracket and securely tighten the bolts.
- Reconnect and Secure: Plug the wiring harness connectors firmly into the new module until they click into place. Reconnect the negative battery terminal.
- Final Step: In some cases, a security relearn procedure may be necessary. This simple process, often called a “key cycle,” can typically be done in your driveway and instructions are readily available online for your specific model.
Tailored Fit for Your Ride
This module is a direct replacement for a wide range of GM trucks and SUVs, ensuring a perfect fit and seamless communication with your vehicle’s systems. Please verify your model and part number below. This unit replaces 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.
- Buick Rainier (2006, 4.2L)
- Chevrolet Colorado (2004-2006)
- Chevrolet Trailblazer & Trailblazer EXT (2006, 4.2L)
- GMC Canyon (2004-2006)
- GMC Envoy, 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)
Frequently Asked Questions About Your 2006 Envoy PCM
Do I need to do any programming after I receive this PCM?
No. We program the module to your vehicle’s VIN before shipping. It arrives ready for installation. In some cases, a simple key-cycle security relearn procedure is required, which you can do yourself in minutes.
How do I provide my vehicle’s VIN?
After you complete your purchase, you will receive instructions on how to send us your VIN. We cannot ship your part until we receive this information, as the programming is essential for the part to function.
Will this fix my specific problem?
This PCM is a direct solution for issues caused by a faulty computer, including common trouble codes like P0601. While it resolves the vast majority of electronic engine and transmission issues, it’s always best to ensure your vehicle has been properly diagnosed.
Is this a plug-and-play installation?
Yes, for the most part. Once you swap the hardware and perform the security relearn (if needed), your vehicle should start and run correctly. No dealership tools are required.
What if I order the wrong part?
We strongly encourage you to use the compatibility list and cross-reference your original part number. If you’re unsure, please contact us with your VIN before ordering, and our experts will be happy to verify the correct fitment for you.