Restore Your Truck’s Heartbeat and Drive with Confidence
Is your Chevrolet Colorado or GMC Canyon suddenly running rough, stalling unexpectedly, or showing a persistent Check Engine Light? These frustrating issues often point to a failing Powertrain Control Module (PCM), the central computer that manages your engine’s performance. Instead of facing expensive dealership diagnostics and programming fees, take control of your repair. This module arrives at your door fully programmed to your vehicle’s specific VIN, providing a direct, reliable solution to get you back on the road with the performance and peace of mind you deserve.
Warning Signs and How to Overcome Them
A failing PCM can manifest in confusing ways. If you’re experiencing any of the following, it’s a strong indicator that your truck’s brain needs attention:
- ✔ Persistent Check Engine Light with codes like P0601, P0602, or P0606.
- ✔ Rough or erratic engine idling.
- ✔ A sudden, unexplained drop in fuel economy.
- ✔ Harsh or unpredictable automatic transmission shifting.
- ✔ The engine cranks but refuses to start.
- ✔ Communication errors with diagnostic scan tools.
Replacing the module with our pre-programmed unit directly addresses these root causes, restoring the precise fuel, spark, and transmission commands your vehicle needs to run like new.
From the Technician’s Bay: The All-Too-Common Sensor Chase
“I once had a 2005 Canyon in the shop that was driving its owner crazy. He’d replaced O2 sensors, the MAF sensor, even the throttle body, but the truck still idled poorly and guzzled gas. The codes were all over the place. After confirming the wiring was solid, we tested the PCM. Sure enough, the processor was failing intermittently. We installed a VIN-programmed module, and it was like a different truck. It’s a powerful reminder that sometimes the problem isn’t the sensors, but the computer reading them.”
The Core Benefits of a Pre-Programmed 2004-2006 Colorado PCM
This isn’t just a replacement part; it’s a complete solution. We handle the complex programming for you, using the latest GM software updates available for your specific vehicle. This critical step ensures that once installed, the module communicates flawlessly with your truck’s existing systems, from the ignition to the transmission. You get a component that’s truly ready for installation, saving you hundreds of dollars and the hassle of a trip to the dealer.
Guided Installation to Restore Peace of Mind
You don’t need to be a master mechanic to complete this job. With basic hand tools and this guide, you can confidently perform the replacement. For GM vehicles of this era, a simple security relearn procedure is required after installation.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the Old Module: On most Colorado and Canyon models, the PCM is located on the right-hand (passenger) side of the firewall in the engine bay.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that need to be released. Once disconnected, unbolt the module from its bracket and remove it.
- Install the New PCM: Mount your new, pre-programmed module in the same location and securely reconnect the electrical harnesses. Ensure they click into place.
- Reconnect Power: Reattach the negative battery terminal.
- Perform Security Relearn: This step syncs the new PCM with your vehicle’s anti-theft system. Turn the key to the “ON” position (without starting the engine) for 10-15 minutes. The “Security” light on the dash should turn off. Turn the key off for 10 seconds. Repeat this cycle two more times (for a total of three cycles). After the third cycle, the vehicle will be ready to start.
Tailored Fit for Your Ride
This module is a direct-fit replacement for a wide range of GM vehicles, ensuring perfect compatibility when programmed to your VIN. It fits the following models:
- Chevrolet Colorado: 2004-2006
- GMC Canyon: 2004-2006
- Hummer H3: 2006
- Buick Rainier: 2006 (4.2L)
- Chevrolet Trailblazer & Trailblazer EXT: 2006 (4.2L)
- GMC Envoy & Envoy XL: 2006 (4.2L)
- Isuzu Ascender: 2006 (4.2L)
- Isuzu I-280 & 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.
Frequently Asked Questions
Why do you need my VIN?
Your Vehicle Identification Number (VIN) is essential. It allows us to load the exact factory software and calibrations for your truck’s specific engine, transmission, and options. This ensures perfect compatibility and function right out of the box, eliminating the need for further programming.
Is the security relearn procedure difficult?
Not at all! It’s a simple process that requires no special tools. Just follow the key-cycling steps outlined in our installation guide. This procedure syncs the new PCM to your vehicle’s anti-theft system, allowing it to start. It typically takes about 30 minutes to complete.
Will this fix my specific check engine light codes?
This module is the definitive solution for internal PCM failure codes, such as P0601 (Internal Control Module Memory Check Sum Error) or P0606 (PCM Processor Fault). It can also resolve a wide range of other codes if the PCM itself is the root cause of the fault.
What if I have questions during installation?
We’re here to help. Our team of experienced technicians is available to provide support and answer any questions you might have. Your success is our priority, and we’re committed to helping you complete your repair with confidence.
Do I need to send my old part back?
This listing does not require a core return. You can keep your old module, which saves you the time and expense of return shipping.