End the Guesswork and Get Back on the Road with Confidence
Is your GMC Envoy XL acting erratically? Stalling at stoplights, shifting poorly, or refusing to start altogether? A persistent Check Engine Light can turn every drive into a stressful gamble. The Powertrain Control Module (PCM) is the brain of your vehicle, and when it falters, the symptoms can be frustrating and widespread. This isn’t just an inconvenience; it’s a matter of reliability and peace of mind. We offer the definitive solution: a professionally programmed PCM, flashed with the latest GM software and tailored specifically to your vehicle’s VIN. Forget expensive dealership visits and the hassle of programming. This is the direct, dependable fix that restores your vehicle’s performance and your confidence in its ability to get you where you need to go.
Warning Signs Your PCM is Failing and How to Overcome Them
A failing engine computer can manifest in numerous ways, often mimicking other component failures. If you’re experiencing any of the following, a faulty PCM could be the culprit. This replacement is designed to resolve these exact issues:
- ✔ Check Engine Light: Illuminates for no apparent reason, often with communication-related Diagnostic Trouble Codes (DTCs) like P0601, P0605, or P0606.
- ✔ Engine Performance Problems: You might notice rough idling, hesitation during acceleration, reduced fuel economy, or random stalling.
- ✔ No-Start Condition: The engine cranks but won’t start, indicating the PCM isn’t properly managing the fuel and ignition systems.
- ✔ Transmission Shifting Issues: Harsh shifting, getting stuck in gear, or erratic behavior can be caused by the PCM failing to communicate correctly with the transmission control module.
- ✔ Failed Emissions Test: An inability to pass smog or emissions testing is a common sign of a malfunctioning engine computer.
From the Shop Floor: “A customer brought in his 2006 Trailblazer, a cousin to the Envoy, that had been to two other shops. It had a bizarre stalling issue that only happened after 20 minutes of driving. No one could figure it out. We diagnosed a failing processor in the PCM. Instead of a costly dealer part, we installed one of our pre-programmed units. The customer called a week later, ecstatic. He said, ‘It’s like I have a new truck. I can finally trust it on long trips again.’ That’s the feeling we aim to deliver—not just a part, but the return of reliability.”
Guided Installation to Restore Peak Performance
Installing your replacement 2006 Envoy XL PCM is a straightforward process that you can perform with basic hand tools. Follow these steps for a successful repair.
- Safety First: Begin by disconnecting the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the PCM: On your Envoy XL, the PCM is typically found in the engine bay, on the driver’s side, attached to the inner fender or firewall.
- Disconnect the Harnesses: Carefully release the locking tabs on the electrical connectors and gently pull them straight out from the module. There are usually two or three main connectors. Avoid forcing them.
- Remove the Old Module: Unbolt the mounting brackets holding the old PCM in place and remove it from the vehicle.
- Install the New PCM: Mount your new, pre-programmed PCM in the same location, securing it with the original bolts.
- Reconnect Everything: Firmly plug the electrical harnesses back into the new module until they click into place. Reconnect the negative battery terminal.
- Final Step: Your vehicle may need to complete a security relearn procedure, which typically involves turning the key to the ‘ON’ position for 10-15 minutes. In most cases, it will start right up, fully operational and ready to drive.
Tailored Fit for Your Ride
This module is a direct replacement for part number 19209820 and is guaranteed to be compatible with the following vehicles and their specified options. We program it using your VIN to ensure it is a perfect match for your vehicle’s systems.
- 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 & I-350: 2006
- SAAB 9-7X: 2006 (6 cylinder)
This computer is also 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, 19209821. Ordering this part ensures you receive a fully compatible and correctly programmed 2006 Envoy XL PCM.
Frequently Asked Questions
Frequently Asked Questions
How does the VIN programming work?
After you place your order, you will need to provide us with your vehicle’s 17-digit VIN. Our technicians use this number to access the latest GM-certified software for your specific vehicle configuration. We flash the module so it matches your original, ensuring it works seamlessly with your engine, transmission, and options.
Is this really ‘plug and play’?
Yes, for over 95% of vehicles. Because we program the unit to your VIN, it eliminates the need for expensive dealer tools. Once installed, the vehicle will typically start and run perfectly. Some models may require a simple, key-on security relearn procedure that you can do yourself in about 15 minutes.
Do I need to send my old PCM back?
This listing does not require a core return. You can keep your old part, which saves you the time and expense of shipping it back to us.
Will this fix my specific problem?
This PCM is designed to correct issues directly caused by a faulty module, such as internal processor errors (P0606), communication failures, and erratic engine/transmission behavior. While it solves a wide range of problems, it’s always best to have your vehicle properly diagnosed to confirm the PCM is the root cause.
What if my part number isn’t on the list?
The part numbers listed cover a wide range of compatible modules. If your number is not on the list, please contact us with your vehicle’s year, make, model, and original part number. We can verify compatibility and ensure you get the correct component for your vehicle.