Bring Your Envoy Back to Life
Is your 2006 GMC Envoy running rough, shifting erratically, or showing a persistent Check Engine Light? The Powertrain Control Module (PCM) is the central command center for your engine and transmission. When it begins to fail, it can cause a cascade of frustrating and unpredictable issues. This isn’t just an inconvenience; it’s a matter of reliability and peace of mind. Our expertly programmed PCM is the definitive solution, designed to restore the smooth, dependable performance you expect from your vehicle. We take the guesswork out of the repair by flashing the unit with the latest GM software updates, specifically matched to your vehicle’s VIN. This ensures a seamless installation and gets you back on the road with confidence.
An Expert’s Note: The Diagnostic Dead End
I remember a customer with a Trailblazer—same platform as your Envoy—who had spent months and a small fortune chasing an intermittent stalling issue. He’d replaced sensors, checked wiring, and was at his wit’s end. The problem was a heat-sensitive fault inside the PCM that only acted up after 20 minutes of driving. Swapping in a pre-programmed module like this one solved the problem in under an hour. It’s a powerful reminder that sometimes the ‘brain’ is the issue, and a direct replacement is the fastest path back to a worry-free drive.
Is Your Vehicle Showing These Warning Signs?
- ✔ Check Engine Light: Persistent illumination, especially with codes like P0601 (Internal Control Module Memory Check Sum Error) or P0606 (PCM Processor Fault).
- ✔ Poor Performance: Noticeable loss of power, hesitation during acceleration, or a sudden drop in fuel economy.
- ✔ Erratic Shifting: The transmission may shift harshly, late, or seem to hunt for the right gear.
- ✔ Stalling or Rough Idle: Your Envoy may stall unexpectedly at stops or idle erratically, making for a stressful driving experience.
- ✔ No-Start Condition: In severe cases, a complete PCM failure can prevent the engine from starting at all.
Guided Installation to Restore Your Ride
Installing your replacement 2006 GMC Envoy PCM is a straightforward process that you can perform with basic hand tools. Our pre-programming service means there’s no need for an expensive trip to the dealership.
- Safety First: Begin by disconnecting the negative terminal on your vehicle’s battery to prevent any electrical shorts.
- Locate the Module: On your 2006 Envoy, the PCM is typically located on the driver’s side of the engine compartment, near the firewall.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old module. They have locking tabs that need to be released. Once disconnected, unbolt the module from its mounting bracket.
- Install the New PCM: Mount the new module in the same location and securely reconnect the electrical harnesses. You should hear a ‘click’ as they lock into place.
- Final Step: Reconnect the negative battery terminal. The vehicle may need to go through a ‘relearn’ procedure, which often involves simply starting the engine and letting it idle for a few minutes, followed by a short test drive.
Tailored Fit For Your Vehicle
This module is a direct-fit replacement for your 2006 GMC Envoy PCM and is also compatible with a wide range of other GM vehicles. Please verify your part number or vehicle in the list below to ensure perfect compatibility.
- 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 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.
Frequently Asked Questions
What exactly does the PCM do?
The Powertrain Control Module (PCM) acts as the main computer for your vehicle’s engine and transmission. It processes data from dozens of sensors to control fuel injection, ignition timing, transmission shift points, and emissions systems to ensure optimal performance and efficiency.
Is this part ready to install out of the box?
Yes! The main benefit of our service is that we program the module to your vehicle’s specific VIN before we ship it. This means it’s ready for a plug-and-play installation without requiring any additional programming from a dealer.
Where is the PCM located on my 2006 Envoy?
On most 2006 GMC Envoys with the 4.2L engine, you will find the PCM in the engine bay, mounted on the driver’s side near the firewall or inner fender.
What information do you need from me?
After you complete your purchase, we will need you to provide your vehicle’s 17-digit VIN (Vehicle Identification Number). This allows us to load the correct software and ensure perfect compatibility with your vehicle’s specific options.
Will this fix my check engine light for good?
If the check engine light is caused by an internal failure of the PCM (common codes include P0601 through P0606), this replacement module will solve the problem. However, if the code is related to a faulty sensor or other component, that part will also need to be addressed.