Is Your Truck Running Rough? It Could Be The Powertrain Control Module.
If your 2004-2006 GMC Canyon, Chevy Colorado, or Hummer H3 is experiencing baffling issues like a persistent check engine light, erratic shifting, poor fuel economy, or even a no-start condition, the culprit is often the very brain of your vehicle: the Powertrain Control Module (PCM). This vital component manages everything from fuel injection and ignition timing to transmission shift points. When it begins to fail, it can create a cascade of problems that are frustrating and difficult to diagnose. Don’t let a faulty computer keep your reliable truck off the road. This is your direct-fit, VIN-programmed solution.
The Simple Solution for a Complex Problem: A VIN-Programmed 2004-2006 Canyon PCM
Replacing a PCM isn’t as simple as swapping a battery. Modern GM vehicles have sophisticated anti-theft systems (like Passlock or VATS) and vehicle-specific software calibrations. A module from a salvage yard or a generic part won’t work without expensive programming at a dealership. We eliminate that hassle. By providing us with your vehicle’s VIN at checkout, you receive a genuine GM control module that has been professionally programmed with the latest factory software updates specific to your truck. This ensures seamless integration, correct operation, and a straightforward installation process.
From the Diagnostic Bay
We once had a 2005 Colorado come into the shop with what the owner was convinced was a failing transmission. It was shifting hard between first and second gear and occasionally wouldn’t shift into overdrive. He had already spent hundreds on a transmission fluid flush and new solenoids with no improvement. After hooking up our diagnostic scanner, we noticed erratic data coming from the PCM’s transmission control circuits. Instead of a costly transmission rebuild, the fix was a properly programmed PCM. The truck drove like new again. It’s a classic case where the ‘brain’ was sending bad signals, not the ‘body’ being broken.
Common Symptoms of a Failing PCM
- ✔ Persistent Check Engine Light (CEL) with various communication or sensor codes.
- ✔ Unexplained drops in fuel efficiency.
- ✔ Rough or inconsistent engine idle.
- ✔ Harsh, delayed, or erratic automatic transmission shifting.
- ✔ Engine stalling, stumbling, or misfiring for no apparent reason.
- ✔ The vehicle cranks but refuses to start.
- ✔ Failure to pass an emissions test due to module-related codes.
Guaranteed Compatibility and Wide-Ranging Fitment
This Powertrain Control Module, identified by part number 12596784, is a direct replacement for a wide array of original equipment part numbers, ensuring you get the right component. Beyond the 2004-2006 Canyon PCM application, this module is also the correct fit for numerous other GM vehicles, including:
- 2004-2006 Chevrolet Colorado
- 2006 Hummer H3
- 2006 Buick Rainier (4.2L)
- 2006 GMC Envoy, Envoy XL (4.2L)
- 2006 Chevrolet Trailblazer, Trailblazer EXT (4.2L)
- 2006 Isuzu Ascender (4.2L), I-280, I-350
- 2006 Saab 9-7X (6 cylinder)
By ordering from us, you’re not just buying a part; you’re buying a complete, ready-to-install solution that restores your vehicle’s performance and reliability. Get back on the road with confidence.
Frequently Asked Questions
Why do you need my VIN?
Your Vehicle Identification Number (VIN) is essential for us to load the exact, correct GM factory software for your truck’s specific engine, transmission, and options. It also allows us to program the module to communicate with your vehicle’s anti-theft system, preventing a no-start situation after installation.
Is this part difficult to install?
The physical installation is typically very simple. It involves disconnecting the battery, unplugging the electrical connectors, and unbolting the old module. Once the new one is installed, you may need to perform a simple security relearn procedure, which takes about 30 minutes and does not require any special tools. We can provide instructions for this process.
Will this fix my check engine light?
If the check engine light is on due to an internal failure of the PCM, then yes, this will resolve the issue. However, the light can indicate problems with other sensors or components. It’s always best to have the codes read by a professional to confirm the PCM is the root cause of the problem.
What part numbers does this module replace?
This module is a direct replacement for a wide range of part numbers, including 12569773, 12588650, 12591647, 12596783, 12597521, 12606399, and many others listed in the description. If your part number is on the list, this module will work for your vehicle.
Is there a core charge for my old module?
No, there is no core charge or need to return your old, faulty module. The price you see is the final price for the programmed part delivered to you.