Restore Your Truck’s Peak Performance and Reliability
Is your Chevrolet Colorado or GMC Canyon suddenly running rough, shifting erratically, or refusing to start? The frustration of an unreliable vehicle can disrupt your entire day. The Powertrain Control Module (PCM) is the central command center for your truck’s engine and transmission. When it fails, it can trigger a cascade of confusing and concerning issues. This replacement PCM, part number 12594430, is the definitive solution to get you back on the road with confidence. We professionally flash it with the latest GM software updates, tailored specifically to your vehicle’s VIN. This isn’t just a part; it’s peace of mind in a box, ready for a simple installation.
Warning Signs Your PCM Needs Attention
A failing computer can mimic many other mechanical problems. If you’re experiencing any of the following, a faulty PCM could be the culprit:
- ✔ Unexplained Check Engine Light (CEL) with codes like P0601, P0602, P0606, or U0100.
- ✔ Rough or inconsistent idling that you can’t seem to solve.
- ✔ Noticeable decrease in fuel economy without a change in driving habits.
- ✔ Harsh or delayed shifting from the automatic transmission.
- ✔ The engine cranks but refuses to start, even with a good battery and fuel supply.
- ✔ Communication errors with diagnostic scan tools.
Guided Installation to Restore Peace of Mind
You don’t need to be a master mechanic to complete this repair. With basic hand tools and a little patience, you can restore your truck’s brainpower. Our module comes ready to install, taking the complex programming work off your hands.
- Safety First: Begin by disconnecting the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the Module: On most 2004-2006 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 mounting bracket.
- Install the New PCM: Mount your new, pre-programmed PCM securely onto the bracket. Re-attach the electrical connectors, ensuring they click firmly into place.
- Reconnect and Start: Reconnect the negative battery terminal. In many cases, the vehicle will start and run perfectly. Some vehicles may require a simple security relearn procedure, which can be done without special tools.
An Expert’s Note: The Diagnostic Wild Goose Chase
“I once had a customer with a 2005 Canyon who had spent nearly a thousand dollars replacing oxygen sensors, the mass airflow sensor, and even a throttle body. His truck still idled poorly and threw random codes. He was at his wit’s end. We finally tested the PCM and found an internal processor fault. After installing a VIN-programmed module just like this one, the truck ran like it just rolled off the assembly line. It’s a powerful reminder that sometimes the ‘brain’ is the source of the problem, and starting with a solid foundation like a properly functioning 2004-2006 Colorado PCM can save you time, money, and a whole lot of headaches.”
Tailored Fit for Your Ride
This module is a direct-fit replacement for a wide range of GM trucks and SUVs. Please verify your vehicle is on the list below. This unit replaces numerous original part numbers, including 12569773, 12588650, 12594430, 12597521, 12606399, and more.
- Chevrolet Colorado: 2004-2006
- GMC Canyon: 2004-2006
- Hummer H3: 2006
- Buick Rainier: 2006 (4.2L)
- Chevrolet Trailblazer / EXT: 2006 (4.2L)
- GMC Envoy / XL: 2006 (4.2L)
- Isuzu Ascender: 2006 (4.2L)
- Isuzu i-280 / i-350: 2006
- Saab 9-7x: 2006 (6 cylinder)
Frequently Asked Questions
Is this part truly plug-and-play?
Yes, this module comes programmed to the VIN you provide, so it’s ready for installation. In some cases, your vehicle may require a security relearn procedure (also known as a CASE relearn) to sync with the new module. This is a simple process that typically involves turning the key on and off and can be done without any special tools.
How do I give you my vehicle’s VIN?
After you complete your purchase, you will receive instructions on how to send us your 17-digit Vehicle Identification Number (VIN). We cannot ship your part until we receive this information, as the programming is essential for it to function correctly in your truck.
Will this fix my transmission shifting problems?
The PCM controls both engine and transmission functions. If your shifting issues are caused by faulty electronic commands from a failing module, then this part is the correct solution. However, mechanical issues within the transmission itself will not be resolved by replacing the PCM.
Do I need to return my old PCM?
No core charge is required for this part. You can keep your old module or recycle it locally.
What if my original part number isn’t on the list?
The provided list covers the most common compatible part numbers. If your module’s part number is different, please contact us with your VIN and original part number. We can verify compatibility to ensure you receive the correct component for your vehicle.