Bring Your Envoy Back to Life
Is your 2006 GMC Envoy feeling sluggish, unpredictable, or lighting up the dashboard like a holiday tree? A failing Powertrain Control Module (PCM) can be the hidden culprit behind a host of frustrating issues, turning your reliable SUV into a source of daily stress. This isn’t just about a check engine light; it’s about the confidence you have in your vehicle. We’re here to restore that confidence with a fully programmed, dependable engine computer that gets you back on the road with peace of mind.
This module arrives at your doorstep flashed with the latest GM software updates, tailored specifically to your vehicle’s Vehicle Identification Number (VIN). This critical step ensures seamless communication between your engine, transmission, and other vital systems, eliminating the guesswork and the need for an expensive trip to the dealership. It’s the straightforward, reliable solution to get your Envoy running the way it was designed to.
Warning Signs and How to Overcome Them
If you’re noticing any of the following, a failing PCM could be the cause. Replacing it can restore performance and efficiency.
- ✔ Persistent Check Engine Light (CEL)
- ✔ Diagnostic Trouble Codes (DTCs) like P0601, P0606, or communication errors.
- ✔ Rough or erratic idling and stalling.
- ✔ Noticeable decrease in fuel economy.
- ✔ Harsh or delayed transmission shifting.
- ✔ Engine misfires or poor acceleration.
- ✔ Complete no-start condition where the engine cranks but won’t fire.
Guided Installation for a Smooth Repair
You can do this. With basic tools and a little patience, you can install your new PCM and get back to a smooth-running vehicle. Here’s a general guide:
- Safety First: Disconnect the negative terminal from your vehicle’s battery and wait at least 15 minutes to allow the system to fully discharge.
- Locate the Module: On your 2006 Envoy, the PCM is typically found in the engine bay, on the driver’s side, near the firewall.
- Disconnect the Harnesses: Carefully release the locking tabs on the electrical connectors and gently pull them straight out from the module. Never force them. Inspect the connectors for any corrosion or bent pins.
- Remove the Old PCM: Unbolt the mounting hardware holding the old module in place and remove it from the vehicle.
- Install the New Module: Seat your new, pre-programmed 2006 Envoy PCM into the mounting bracket and secure it with the original hardware.
- Reconnect Everything: Firmly plug the electrical harnesses back into the new module until they click into place. Reconnect the negative battery terminal.
- Final Step: In many cases, a security or CASE relearn procedure may be necessary with a capable scan tool for the vehicle to start and run correctly. This syncs the new module with your vehicle’s anti-theft and crankshaft position systems.
An Expert’s Note: The Intermittent Stall That Vanished
I once worked with a customer whose Envoy had a baffling intermittent stalling issue. It would happen at red lights, in parking lots—completely at random. No codes were stored consistently. We checked everything: fuel pump, sensors, wiring. Finally, we suspected the brain itself. After installing a properly programmed 2006 Envoy PCM, the problem vanished. The customer called a week later, overjoyed. It wasn’t just that his truck was fixed; it was that his daily anxiety about it dying in traffic was gone. That’s the real fix.
Tailored Fit for Your Ride
This computer is a direct-fit replacement for the following vehicles, ensuring a perfect match for your repair. It is compatible with 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.
- 2006 Buick Rainier (4.2L)
- 2004-2006 Chevrolet Colorado
- 2006 Chevrolet Trailblazer & Trailblazer EXT (4.2L)
- 2004-2006 GMC Canyon
- 2006 GMC Envoy & Envoy XL (4.2L)
- 2006 Hummer H3
- 2006 Isuzu Ascender (4.2L)
- 2006 Isuzu i-280
- 2006 Isuzu i-350
- 2006 Saab 9-7x (6 cylinder)
Frequently Asked Questions
Do I need to do anything after installation?
Yes, after installing the new module, you will likely need to perform a security relearn procedure and a Crankshaft Variation (CASE) relearn. This requires a compatible bi-directional scan tool. This is a standard procedure for these vehicles to ensure the anti-theft system and engine sensors are properly synced.
Is this a plug-and-play part?
Because we program it to your VIN, it’s as close to plug-and-play as possible. However, due to GM’s security systems, the final relearn procedures mentioned above are almost always necessary for the vehicle to start and run properly.
How do I provide my VIN?
After you complete your purchase, you can send us a message with your 17-digit VIN. We cannot ship the module until we receive this information, as the programming is specific to your vehicle.
What if I have a different part number?
This module replaces a wide range of original part numbers. Please check the fitment list in our description. As long as your vehicle model and year are listed, and your original part number is on our cross-reference list, this module will work for you.
Will this fix my transmission shifting problems?
The PCM controls both the engine and the transmission. If your shifting issues are caused by faulty electronic commands from a failing module, then this new 2006 Envoy PCM is very likely to solve the problem. However, it will not fix mechanical issues within the transmission itself.