End the Guesswork and Get Back on the Road with Confidence
Is your GMC Envoy, Trailblazer, or Colorado suddenly running rough, shifting erratically, or refusing to start? A nagging Check Engine Light can turn every drive into a stressful experience. These are classic signs that the brain of your vehicle, the Powertrain Control Module (PCM), is failing. This isn’t just an inconvenience; it affects your vehicle’s performance, fuel economy, and safety. We offer a dependable, straightforward solution: a replacement PCM, professionally programmed to your vehicle’s specific VIN with the latest GM software updates. This isn’t just a part; it’s the first step to restoring the smooth, reliable performance you depend on.
An Expert’s Note: The Dealership Alternative
I remember a customer with a 2006 Trailblazer who was quoted over a thousand dollars at the dealership for a new PCM and programming. His truck barely ran, and he was stressed about the cost. He found our VIN-programmed module, installed it himself in under 30 minutes in his driveway, and called us back ecstatic. The truck started right up and ran better than it had in years. That’s the power of a direct, reliable solution—it saves you not just money, but a world of hassle and worry.
Symptoms of a Failing PCM & The Benefits of This Solution
If you’re experiencing any of the following, a faulty PCM is the likely culprit. Replacing it with our programmed unit will restore your vehicle’s health and your peace of mind.
- ✔ Check Engine Light On: Often with codes like P0601, P0602, P0606, or U0100.
- ✔ Poor Engine Performance: Noticeable loss of power, hesitation during acceleration, or rough idling.
- ✔ Reduced Fuel Economy: The engine isn’t running efficiently, causing more trips to the pump.
- ✔ Erratic Transmission Shifting: Harsh or delayed shifts because the PCM can’t communicate properly with the transmission.
- ✔ Engine Stalling or No-Start: The most severe symptom, leaving you stranded and frustrated.
- ✔ Failed Emissions Test: A malfunctioning PCM can’t properly manage the emissions systems.
A Simple Path to a Lasting Repair: Your 2006 Envoy Powertrain Control Module
We’ve made this process as simple as possible. Because we program the module to your VIN before shipping, you won’t need a trip to the dealer or any special scan tools. This is a true plug-and-play solution designed for the DIYer and professional alike.
Guided Installation for a Confident Fix
- Safety First: Begin by disconnecting the negative terminal on your vehicle’s battery to prevent any electrical shorts.
- Locate the Old Module: On most of these vehicles (like the Envoy, Trailblazer, and Rainier), the PCM is located on the driver’s side of the engine bay, near the firewall. On others (like the Colorado and Canyon), it’s on the passenger side firewall.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that may need to be gently pried or squeezed. Once disconnected, unbolt the module from its mounting bracket.
- Install the New PCM: Mount your new, pre-programmed PCM in the same location. Securely reconnect the electrical harnesses, ensuring they click into place.
- Final Step: Reconnect the negative battery terminal. The vehicle may need to complete a security relearn procedure, which is a simple process you can do at home (instructions are often included or easily found online). Start the engine and enjoy your restored ride!
Guaranteed Compatibility for Your Vehicle
This module is a direct replacement for a wide range of GM trucks and SUVs. Please verify your vehicle is on the list below. This unit is compatible with 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, 19209820, 19209821.
- 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)
Frequently Asked Questions
What does “VIN Programmed” mean?
It means we flash the module with the specific software and calibrations for your exact vehicle using the Vehicle Identification Number (VIN) you provide. This ensures perfect communication with your vehicle’s other systems, just like the original part from the factory.
Do I need to do anything else after I install it?
In most cases, no. The module is ready to go. Some GM vehicles may require a simple security relearn procedure (also known as a CASE relearn) which involves turning the key on and off in a specific sequence. This procedure does not require any special tools.
Is this guaranteed to fix my check engine light?
If the check engine light is caused by a faulty PCM (e.g., internal processor error codes like P0601), this part is the correct solution. However, a check engine light can be triggered by many other components. It is always best to have the codes read to confirm the diagnosis before ordering.
Where do I find my VIN?
Your VIN is a 17-digit number located on a tag on the driver’s side of the dashboard (visible through the windshield), on the driver’s side door jamb sticker, and on your vehicle’s registration and insurance documents.
How do I send you my VIN after purchase?
After you complete your purchase, you will receive an email with simple instructions on how to reply with your vehicle’s VIN. We cannot ship your part until we receive this information, as the programming is essential for it to function.