Is Your Truck Sidelined by Frustrating Electrical Problems?
Is your 2004-2006 Chevy Colorado, GMC Canyon, or Hummer H3 suffering from a persistent check engine light, erratic shifting, a rough idle, or even a no-start condition? These are classic signs of a failing Powertrain Control Module (PCM), the electronic brain of your vehicle. A faulty PCM can make your dependable truck feel unreliable, leaving you stranded and facing a costly trip to the dealership. This professionally programmed PCM is the definitive, hassle-free solution to get your truck back on the road and running strong.
Common Symptoms & Your Solution
A failing engine computer can cause a wide range of issues that are often misdiagnosed. If you’re experiencing any of the following, a faulty module is the likely culprit:
- Unexplained Check Engine Light (with codes like P0601, P0606, or U0100)
- Harsh or incorrect automatic transmission shifts
- Poor fuel economy and engine performance
- Engine stalling, sputtering, or refusing to start
- Communication issues with diagnostic scan tools
Instead of guessing with other parts, go straight to the source. Our professionally programmed 2004-2006 Colorado PCM is the direct-fit answer to these frustrating electronic issues, restoring your vehicle’s factory performance and reliability.
Features & Benefits
- ✔ VIN-Programmed for Your Truck: We flash this module with the latest official GM software updates using your vehicle’s specific VIN. This crucial step ensures perfect compatibility and function right out of the box.
- ✔ Simple Plug-and-Play Installation: Forget about expensive dealership programming. Once you receive the unit, installation is straightforward. In most cases, you’ll be back on the road in under an hour.
- ✔ Restores Peak Performance: This module is your solution to finally clear that check engine light, fix erratic engine and transmission behavior, and restore the smooth operation you depend on.
- ✔ Broad GM Truck Compatibility: This single unit is a direct replacement for a wide range of original part numbers (including 12589585, 12597521, 12606399, and more), making it the correct choice for your Colorado, Canyon, H3, Trailblazer, or Envoy.
- ✔ Peace of Mind Protection: This unit is backed by our one-year replacement warranty.
From the Technician’s Bench: As a mechanic, I’ve seen countless mid-2000s GM trucks come in with baffling electronic gremlins. More often than not, the root cause traces back to the PCM. After years of heat cycles under the hood, the delicate internal connections and processors can fail, leading to intermittent problems that are a nightmare to diagnose. Replacing the unit with a properly programmed module like this one isn’t just a repair; it’s a fundamental restoration of the vehicle’s core reliability. It’s the fix that lasts. This is the correct way to solve the problem for your 2004-2006 Colorado PCM issues.
Frequently Asked Questions
Do I need to send my old computer back?
No, there is no core charge or requirement to return your old module. You can keep it or dispose of it yourself.
How do I provide my vehicle’s VIN?
After you complete your purchase, you will receive instructions on how to send us your vehicle’s 17-digit VIN. We cannot ship your order until we receive this information, as the programming is specific to your truck.
Is any additional programming required after installation?
In many cases, no. However, some GM vehicles require a simple “Security Relearn” procedure after the new PCM is installed, which involves a sequence of key turns. We include easy-to-follow instructions for this process. It does not require any special tools.
Is this difficult to install myself?
For someone with basic mechanical skills, this is a very manageable job. It typically involves disconnecting the vehicle’s battery, unplugging the electrical connectors from the old PCM, unbolting it, and then installing the new one in the reverse order. Always disconnect the battery before starting.
Will this fix my specific problem?
This module corrects issues directly caused by a failing PCM. While it solves the vast majority of electronic problems in these trucks, it’s essential to ensure your vehicle’s wiring and sensors are in good condition. A new 2004-2006 Colorado PCM cannot fix a bad sensor or a broken wire elsewhere on the vehicle.
What if my original part number isn’t on your list?
The part numbers listed cover the most common versions, but there are many alternates. If you are unsure about compatibility, please contact us with your VIN before ordering, and we will be happy to verify the correct part for your truck.