Get Your Truck Back on the Road, Fast.
Is your 2004-2006 Chevy Colorado, GMC Canyon, or Hummer H3 suffering from frustrating electrical gremlins? Stalling, erratic shifting, a persistent check engine light, or a complete no-start condition can often be traced back to a failing Powertrain Control Module (PCM). This isn’t just an inconvenience; it’s a critical failure that sidelines your vehicle. This replacement PCM is the definitive, hassle-free solution to restore your truck’s performance and reliability, arriving at your door pre-programmed for your specific vehicle.
Common Symptoms & Your Solution
A faulty PCM can manifest in numerous ways, making diagnosis tricky. If you’re experiencing any of the following, a failing module is the likely culprit:
- Check Engine Light (CEL) with internal processor fault codes (e.g., P0601, P0606).
- No Communication with diagnostic scan tools.
- Engine Stalling or Misfiring for no apparent reason.
- Harsh or Failed Shifting as the PCM controls transmission functions.
- Poor Fuel Economy and overall sluggish performance.
- Crank-No-Start Condition where the engine turns over but won’t fire up.
This unit is the direct answer to these issues. We take the guesswork out of the repair by flashing this programmed 2004-2006 Colorado PCM with the latest GM-certified software updates, tailored precisely to your vehicle’s Vehicle Identification Number (VIN). This ensures all systems—engine, transmission, and security—communicate flawlessly from the moment you install it.
Features & Benefits
- ✔ Plug & Play Installation: This module arrives ready to install. No expensive dealer programming or special tools required.
- ✔ VIN-Matched for Your Vehicle: We program the computer using your truck’s VIN to ensure perfect compatibility with its specific options and systems.
- ✔ Updated GM Software: Flashed with the newest software to correct factory bugs and improve engine and transmission performance.
- ✔ Guaranteed Compatibility: A direct replacement for a wide range of part numbers including 12597521, 12588650, 12606399, and many more.
- ✔ Restored Performance: Solves common drivability issues, restoring the smooth operation and power you expect from your truck.
- ✔ Peace of Mind: This unit is backed by our one-year replacement warranty.
Expert Insight: Why VIN Programming is Non-Negotiable
A common mistake is sourcing a used PCM from a salvage yard. While it might look identical, that module is locked to the original vehicle’s VIN and its specific options, like the security system (Passlock), axle ratio, and tire size. Installing an incorrectly programmed module will lead to a no-start condition, incorrect shifting, or a host of other issues. Our professional VIN programming service for every programmed 2004-2006 Colorado PCM we sell eliminates this critical point of failure, saving you from hours of frustration and the cost of a tow to the dealership. We deliver a true plug-and-play part, engineered to work correctly the first time.
By providing us with your VIN after purchase, you are ensuring that the brain of your truck’s engine is perfectly matched to its body. This is the most reliable and cost-effective way to get your Colorado, Canyon, H3, or other compatible GM vehicle running right again. Don’t let a bad computer keep you off the road—get the right part, programmed correctly, and regain confidence in your vehicle. This is the ideal solution for the DIY mechanic or professional shop looking for a dependable fix for this common issue on the programmed 2004-2006 Colorado PCM.
Frequently Asked Questions
Do I need to do any programming myself?
No. This module is completely programmed to your vehicle’s VIN before it ships. The only additional step required is a simple security relearn procedure that takes about 10-15 minutes and involves cycling the ignition key. We include easy-to-follow instructions for this process.
Where do I provide my vehicle’s VIN?
After you complete your purchase, you will receive instructions on how to send us your VIN. We cannot ship your part until we have this information, as the programming is essential for the part to function.
What is the security relearn procedure?
GM’s Passlock security system requires the new PCM to sync with your vehicle’s Body Control Module and ignition. This is done by turning the key to the ‘ON’ position for 10 minutes, then ‘OFF’ for 10 seconds, and repeating this cycle three times. It’s a simple process that requires no tools.
How can I be sure this part will fit my vehicle?
This PCM fits a wide range of 2004-2006 GM trucks and SUVs, including the Colorado, Canyon, H3, Trailblazer, and Envoy. Please check the compatibility list in the description. As long as your vehicle is on the list, our VIN programming will ensure it works correctly.
Will this fix my transmission shifting problems?
In many cases, yes. The PCM controls the transmission’s shift points, line pressure, and torque converter clutch. If your shifting issues are electronic in nature, this module is the solution. However, it will not fix internal mechanical failures within the transmission itself.