Is Your 2006 GMC Envoy Running Rough? The PCM Might Be the Culprit.
If you’re dealing with a persistent check engine light, erratic engine behavior, poor fuel economy, or even a no-start condition in your 2006 GMC Envoy, a failing Powertrain Control Module (PCM) is a likely cause. As the central computer for your vehicle’s engine and transmission, the PCM is responsible for managing everything from fuel injection and ignition timing to transmission shift points. When it begins to fail, the symptoms can be frustrating and difficult to diagnose. This replacement module is the definitive solution to restore your vehicle’s performance and reliability.
This isn’t just a generic part off a shelf. We take the guesswork out of the repair by programming this module specifically for your vehicle. Simply provide us with your Vehicle Identification Number (VIN) after purchase, and our technicians will flash the unit with the latest, most stable software updates directly from GM. This ensures seamless communication with all other modules in your Envoy, eliminating compatibility issues and the need for an expensive trip to the dealership for programming. It’s a true plug-and-play solution designed to get you back on the road quickly and confidently.
From the Diagnostic Bay
We had a 2006 Trailblazer (which shares the same platform as the Envoy) come into the shop with an intermittent stalling problem that was driving the owner crazy. It would die at stoplights without warning, but then start right back up. No codes were stored consistently. Two other shops had replaced the fuel pump and cleaned the throttle body to no avail. After hooking up our diagnostic scanner and monitoring live data, we noticed the ignition timing values would suddenly drop just before a stall. This pointed to a processing error inside the computer. We installed one of our VIN-programmed PCMs, and the problem was solved instantly. The owner was thrilled to have his reliable truck back after weeks of uncertainty.
Common Symptoms of a Failing 2006 Envoy PCM
A faulty engine computer can manifest in numerous ways. If your vehicle is experiencing any of the following, it’s time to consider a replacement PCM. A new, correctly programmed module can resolve these complex electronic issues and restore your vehicle to its factory-specified operation.
- ✔ Check Engine Light is on with various trouble codes (DTCs).
- ✔ Vehicle fails to start or has difficulty starting.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Engine stalling, stuttering, or misfiring while driving.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Failure to pass state emissions testing.
- ✔ Communication errors with diagnostic scan tools.
Guaranteed Compatibility and Simple Installation
This module is a direct replacement for a wide range of original equipment part numbers, including 12589585, 12569773, 12588650, 12591647, 12604438, and many more. It fits not only the 2006 GMC Envoy with the 4.2L engine but also a variety of other GM trucks and SUVs from the same era, such as the Chevrolet Trailblazer, Isuzu Ascender, and Saab 9-7X. The key to a successful repair is the VIN-specific programming we provide. Once you receive the module, the physical installation is straightforward. Simply disconnect the battery, locate the old PCM in the engine bay (typically on the driver’s side), unplug the wiring harnesses, unbolt the unit, and install the new one in its place. Reconnect the harnesses and the battery, and you’re ready to go. In some cases, a security relearn procedure may be necessary, which can be easily performed without special tools.
Don’t let a faulty computer keep your reliable GM truck off the road. By choosing this pre-programmed 2006 Envoy PCM, you’re getting a quality-tested component that is prepared for your specific vehicle, saving you time, money, and diagnostic headaches.
Frequently Asked Questions
Do I need to do any programming after I receive this PCM?
No. We program the module to the VIN you provide before shipping. This means it is ready for installation right out of the box. In some vehicles, a simple key relearn or security relearn procedure may be required, which typically involves turning the key on and off in a specific sequence and does not require a scan tool.
How do I provide my VIN number?
After you complete your purchase, you can send us your 17-digit VIN through the messaging system or include it in the ‘notes to seller’ section during checkout. We cannot ship your part until we receive the VIN.
Is this a brand new part?
This is a high-quality, OEM replacement part that has been thoroughly inspected and tested to meet or exceed original factory specifications. It is loaded with vehicle-specific software to ensure proper function.
Where is the PCM located on my 2006 GMC Envoy?
On the 2006 GMC Envoy with the 4.2L engine, the Powertrain Control Module (PCM) is typically located in the engine compartment on the driver’s side, near the air filter box.
Will this fix my transmission shifting problems?
The PCM controls both engine and transmission functions. If your shifting problems are caused by faulty electronic signals or processing errors from the computer, then replacing the PCM will likely resolve the issue. However, it will not fix internal mechanical failures within the transmission itself.