Restore Your Truck’s Heartbeat and Drive with Confidence
Is your GMC Envoy running rough, shifting erratically, or showing a stubborn Check Engine Light? These frustrating issues often point to the vehicle’s brain—the Powertrain Control Module (PCM). When it fails, it can feel like you’re chasing ghosts, replacing sensor after sensor with no solution. This isn’t just an inconvenience; it’s a matter of reliability and peace of mind. Get back on the road with the assurance of a dependable vehicle with our professionally programmed PCM, tailored specifically for your truck.
This isn’t just a replacement part; it’s a complete solution. We take a genuine OEM-spec module and flash it with the latest, most stable General Motors software updates. By programming it directly to your vehicle’s unique VIN, we eliminate the need for expensive dealership visits or specialized tools. The result is a seamless installation that restores your engine’s performance, smooths out transmission shifting, and brings back the fuel efficiency you expect. Regain that worry-free drive you’ve been missing.
Warning Signs Your PCM Needs Attention
A failing engine computer can manifest in numerous ways. If you’re experiencing any of the following, this module is the definitive solution to get your vehicle running right again.
- ✔ Persistent Check Engine Light (CEL) that won’t clear.
- ✔ Common Diagnostic Trouble Codes (DTCs) like P0601, P0602, P0606, or U0100.
- ✔ Rough or inconsistent engine idling.
- ✔ A sudden drop in fuel economy (MPG).
- ✔ Harsh or delayed transmission shifting.
- ✔ The engine cranks but refuses to start.
- ✔ Unexplained stalling or loss of power while driving.
From the Mechanic’s Bay: The Elusive Misfire
I once had a 2006 Trailblazer (a cousin to the Envoy) come in with a random misfire that no one could solve. The owner had already replaced plugs, coils, and even injectors. The scans were clean except for that pesky P0300 code. After checking everything, we finally suspected the PCM. We swapped in a pre-programmed module just like this one, and the engine immediately smoothed out. The problem wasn’t a faulty part in the engine bay; it was the computer making the decisions. It’s a powerful reminder that the right ‘brain’ makes all the difference.
Guided Installation to Restore Peak Performance
You don’t need to be a master mechanic to complete this job. With basic hand tools and a little patience, you can have your truck back to factory-spec condition. Follow these simple steps for a successful installation.
- Safety First: Begin by disconnecting the negative terminal from your vehicle’s battery. This prevents any electrical shorts and resets the vehicle’s systems.
- Locate the Module: On your 2006 Envoy, the PCM is typically found in the engine bay, on the driver’s side, mounted near the firewall or inner fender. It’s a metal box with several large electrical connectors.
- Disconnect and Remove: Carefully unplug the wiring harnesses. They have locking tabs that may need to be squeezed or lifted. Once disconnected, unbolt the old module from its mounting bracket and remove it.
- Install the New PCM: Mount your new, pre-programmed PCM in the same location. Ensure it’s secure. Reconnect the wiring harnesses, making sure they click firmly into place.
- Final Steps: Reconnect the negative battery terminal. Your vehicle may require a security relearn procedure, which typically involves turning the key to the ‘ON’ position for 10-15 minutes. Start the engine and enjoy a smoother, more responsive drive!
Tailored Fit for Your Ride: 2006 Envoy PCM Compatibility
This module is a direct-fit replacement, programmed to work seamlessly with the systems in your vehicle. It is compatible with the following makes and models. Please verify your vehicle is on this list before ordering.
- 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)
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.
Pro Tip: Provide Your VIN at Checkout
To ensure a perfect match, please provide your 17-digit Vehicle Identification Number (VIN) in the notes section during checkout or send it to us in a message after your purchase. This allows us to load the correct software and updates for your specific vehicle configuration, guaranteeing a plug-and-play experience.
Frequently Asked Questions
Do I need to have this programmed by a dealer after I receive it?
No. The main benefit of our service is that we program the module to your vehicle’s VIN before we ship it. It will arrive ready to install, with no additional programming required.
What is a security relearn and will I need to do it?
A security relearn, or anti-theft relearn, syncs the new PCM with your vehicle’s anti-theft system. Most GM vehicles of this era require it. It’s a simple procedure you can do yourself, typically involving turning the key to the ‘ON’ position for about 10-15 minutes. We include simple instructions for this process.
Where do I find my vehicle’s VIN?
Your 17-digit VIN can be found on your vehicle’s registration, insurance card, or on a metal plate on the driver’s side of the dashboard, visible through the windshield.
Will this fix my specific problem?
While this PCM is the solution for a wide range of electronic and performance issues, proper vehicle diagnosis is always recommended. This part will resolve problems directly caused by a failing PCM, such as internal processor faults (P0601) or communication errors.
Is this a genuine OEM part?
This is a high-quality, OEM-spec component that is verified for function and durability. We then load it with the official, latest GM software calibration for your vehicle, ensuring it performs exactly as the original did when your truck was new.