Is your Chevrolet Colorado or GMC Canyon suddenly running rough, stalling, or refusing to start? A persistent check engine light can be more than just an annoyance—it’s a sign that the very brain of your truck’s engine is struggling. Restore your vehicle’s performance and your peace of mind with this direct-fit Powertrain Control Module (PCM), pre-programmed specifically for your truck’s VIN.
Forget the hassle and expense of a dealership visit. We take care of the complex programming for you, loading the latest GM software updates onto the module before it even ships. This ensures that once it arrives, it’s ready for a straightforward installation, seamlessly communicating with your truck’s engine, transmission, and other systems. It’s the most effective way to solve deep-rooted electronic issues and get your reliable ride back on the road.
Warning Signs and How to Overcome Them
A failing PCM can manifest in confusing ways. If you’re experiencing any of the following, this module is the definitive solution:
- ✔ Persistent Check Engine Light with codes like P0601, P0606, or other internal controller errors.
- ✔ Unexplained stalling or difficulty starting the engine.
- ✔ Rough idling, hesitation, or a noticeable drop in fuel economy.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Communication errors with diagnostic scan tools.
- ✔ Complete failure to start, even with a good battery and starter.
An Expert’s Note: The End of a Diagnostic Dead End
“I once worked with a customer whose ’05 Canyon had been to three different shops. It had a random misfire and would stall at red lights, but never consistently. They had replaced plugs, coils, and even a fuel pump. The problem was, the old PCM had an internal fault that only showed up when it got hot. Swapping in a properly programmed module wasn’t just a fix; it was a relief. It ended months of frustration for the owner, who could finally trust his truck again for his contracting work. Sometimes, the simplest solution is the right one.”
Effortless Steps for a Confident Fix
You don’t need to be a master mechanic to complete this job. Our pre-programming makes this a manageable DIY task. Here’s a general guide:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electronic work.
- Locate the Old 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.
- Careful Disconnection: Gently release the locking tabs and unplug the wiring harnesses from the old module. Then, unbolt the module from its mounting bracket.
- Install the New PCM: Mount your new, pre-programmed module in the same location, ensuring it’s secure. Reconnect the wiring harnesses, making sure they click firmly into place.
- Power Up: Reconnect the negative battery terminal. The vehicle may require a security relearn procedure, which can typically be done without special tools by cycling the key. Instructions are widely available online or in your service manual.
Guaranteed Fitment for Your 2004-2006 Colorado PCM
This module is a direct replacement for a wide range of part numbers and is confirmed to fit the following vehicles. Simply provide your VIN at checkout for a perfect software match.
- 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)
- Isuzu i-280 / i-350: 2006 (Electronic Control Module; RH firewall)
- Buick Rainier: 2006 (4.2L, Electronic Control Module; LH engine)
- Chevrolet Trailblazer / EXT: 2006 (4.2L, Electronic Control Module; LH engine)
- GMC Envoy / XL: 2006 (4.2L, Electronic Control Module; LH engine)
- Isuzu Ascender: 2006 (4.2L, Electronic Control Module; LH engine)
- Saab 9-7x: 2006 (6 cylinder, Electronic Control Module; LH engine)
This unit replaces part numbers: 12569773, 12588650, 12589311, 12589585, 12591647, 12591648, 12593531, 12593532, 12594430, 12594431, 12596783, 12596784, 12597521, 12597776, 12597777, 12600818, and more.
Frequently Asked Questions
Do I need to have this programmed by a dealer?
No. That’s the primary benefit of our service. We program the module to your vehicle’s specific VIN before we ship it to you. It arrives ready for installation, saving you a trip to the dealership and additional programming fees.
What is a VIN and why do you need it?
The VIN (Vehicle Identification Number) is your car’s unique 17-digit serial number. It contains critical information about your vehicle’s make, model, engine, transmission, and factory-installed options. We use this to load the exact software and calibrations your truck needs to run perfectly.
Will I need to perform a security relearn procedure?
In many cases, yes. This is a simple procedure that syncs the new PCM with your vehicle’s anti-theft system. It typically involves cycling the ignition key and can be done in your driveway in about 30 minutes without any special tools. This is a standard step for this type of repair.
Where is the PCM located on my 2004 Colorado?
The PCM, or Electronic Control Module, is located in the engine compartment, mounted to the firewall on the passenger’s side (RH side) of the vehicle. It will have several large electrical connectors attached to it.
Is this a guaranteed fix for my check engine light?
This module will correct any issues and diagnostic trouble codes (DTCs) directly caused by a failing PCM, such as internal processor faults (P0601). While a faulty PCM is a very common problem, it’s important to ensure other potential issues (like bad sensors or wiring) have been ruled out. This part is a crucial step in restoring your vehicle’s health.