Restore Your Truck’s Brain and Bring Back its Power
Is your Chevrolet Colorado, GMC Canyon, or Hummer H3 feeling sluggish, stalling unexpectedly, or throwing confusing check engine lights? The Powertrain Control Module (PCM) is the central computer of your vehicle, and when it starts to fail, it can cause a cascade of frustrating and unpredictable problems. This isn’t just an inconvenience; it’s a matter of reliability. You deserve a truck that starts every time and runs with the smooth, dependable power you rely on. This replacement PCM is your direct path to restoring that confidence.
We take the guesswork and dealership hassle out of the equation. Each module is meticulously programmed to your vehicle’s specific Vehicle Identification Number (VIN) with the latest GM software updates. This ensures perfect communication between your engine, transmission, and other systems, delivering a seamless, plug-and-play solution right out of the box. Regain the peace of mind that comes from a solid, professional-grade repair you can trust.
Warning Signs Your PCM is Failing
- ✔ Check Engine Light: Persistent illumination, especially with communication-related codes like P0601, P0602, or P0606.
- ✔ No-Start or Hard-Start: The engine cranks but refuses to start, or takes an unusually long time to fire up.
- ✔ Erratic Engine Performance: Unexplained stalling, rough idling, hesitation during acceleration, or a noticeable drop in fuel economy.
- ✔ Harsh or Incorrect Shifting: The transmission may shift erratically, get stuck in a gear, or feel clunky.
- ✔ Communication Issues: Your scan tool may be unable to communicate with the PCM, a definitive sign of a deeper issue.
An Expert’s Note from the Garage
I remember a 2005 Canyon that came into the shop with a ghost of a problem. It would randomly stall at red lights, but never stored a consistent code. The owner had replaced sensors and wires, completely frustrated. We traced the issue back to an internally failing PCM that was overheating intermittently. Installing a properly programmed unit didn’t just fix the stall—it transformed the truck. The owner called a week later just to say how much he enjoyed driving it again. That’s the difference the right part makes: it’s not just about fixing a problem, it’s about restoring the entire driving experience.
Guided Installation for a Confident Repair
- Safety First: Begin by disconnecting the negative terminal on your vehicle’s battery to prevent any electrical shorts.
- Locate the Module: On most 2004-2006 Colorado and Canyon models, you’ll find the PCM mounted on the right-hand (passenger side) firewall in the engine bay.
- Disconnect Connectors: Carefully release the locking tabs and unplug the large wiring harnesses from the old module. Inspect the connectors for any corrosion or bent pins.
- Remove the Old PCM: Unbolt the old module from its mounting bracket. Keep the hardware, as you may need to reuse it.
- Install the New PCM: Mount your new, pre-programmed PCM securely in place. Reconnect the wiring harnesses, ensuring they click firmly into position.
- Reconnect the Battery: Reattach the negative battery terminal.
- Perform Security Relearn (If Needed): In many cases, you will need to perform a simple security relearn procedure. This usually involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating two more times. This allows the vehicle’s anti-theft system to recognize the new computer. Your truck should then start and run smoothly.
Tailored Fit for Your GM Vehicle
This module is a direct replacement for a wide range of part numbers and is guaranteed to be compatible with the following vehicles. This is the correct 2004-2006 Colorado PCM and also fits many other popular GM models.
- Chevrolet Colorado: 2004-2006 (Electronic Control Module; RH firewall)
- GMC Canyon: 2004-2006 (Electronic Control Module; RH firewall)
- Hummer H3: 2006 (Electronic Control Module; RH firewall)
- Buick Rainier: 2006 (Electronic Control Module; LH engine, 4.2L)
- Chevrolet Trailblazer & Trailblazer EXT: 2006 (Electronic Control Module; LH engine, 4.2L)
- GMC Envoy & Envoy XL: 2006 (Electronic Control Module; 4.2L, LH engine)
- Isuzu Ascender: 2006 (Electronic Control Module; 4.2L, LH engine)
- Isuzu I-280: 2006 (Electronic Control Module; RH firewall)
- Isuzu I-350: 2006 (Electronic Control Module; RH firewall)
- Saab 9-7X: 2006 (Electronic Control Module; LH engine, 6 cylinder, ID 12569773 or 12597521)
This module 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 does ‘VIN Programmed’ mean?
It means we load the module with your vehicle’s specific software from GM using its unique 17-digit VIN. This ensures the computer works perfectly with your truck’s engine, transmission, and options, making the installation process as simple as possible.
Is this part truly ‘plug and play’?
Yes, for the most part. Because it comes programmed, you will not need a trip to the dealer for software flashing. However, as with most GM vehicles of this era, you will likely need to perform a simple ‘Security Relearn Procedure’ with your key, which takes about 30 minutes and requires no special tools.
How do I provide my VIN?
After you complete your purchase, you will receive instructions on how to send us your vehicle’s VIN. We cannot ship your part until we receive this information, as the programming is essential for it to function correctly.
Will this fix my check engine light?
If the check engine light is caused by a faulty PCM (common codes include P0601-P0606), then this part will resolve the issue. It’s always best to have a proper diagnosis to confirm the PCM is the root cause before ordering.
What if my original part number isn’t on the list?
The part numbers listed are the most common, but there can be others. As long as your vehicle’s year, make, and model are on our compatibility list, this module will be the correct replacement. The VIN programming ensures it is a perfect match.