2004-2006 GMC Canyon PCM Powertrain Control Module 12604439

Restore Peak Performance to Your GM Truck or SUV

Is your 2004-2006 GMC Canyon, Chevrolet Colorado, or Hummer H3 suffering from frustrating and unpredictable issues? A faulty Powertrain Control Module (PCM), the central computer of your vehicle, is often the culprit behind a wide range of drivability problems. This replacement PCM, part number 12604439, is the definitive solution to get your vehicle running reliably again. It arrives at your door fully programmed with the latest official GM software, specifically flashed to your vehicle’s unique Vehicle Identification Number (VIN). This critical step ensures a simple, direct installation without the need for expensive dealership programming.

Diagnosing and Replacing Your 2004-2006 Canyon PCM

The PCM is responsible for managing everything from fuel injection and ignition timing to transmission shift points and emissions controls. When it begins to fail, the symptoms can be intermittent and difficult to diagnose. You might notice a sudden drop in fuel economy, a check engine light that won’t go away, or a vehicle that refuses to start. By replacing your old, failing module with this pre-programmed unit, you are restoring the core logic that your vehicle depends on for safe and efficient operation. This isn’t just a part; it’s a comprehensive fix for your vehicle’s electronic nervous system.

Common Symptoms of a Failing PCM

• ✔ Persistent Check Engine Light (CEL) with various trouble codes.
• ✔ Rough or erratic engine idling.
• ✔ Unexplained stalling or difficulty starting the engine.
• ✔ Noticeable decrease in fuel efficiency (MPG).
• ✔ Harsh or delayed automatic transmission shifting.
• ✔ Engine misfires or hesitation during acceleration.
• ✔ Communication errors with diagnostic scan tools.

Plug-and-Play Installation Process

We take the complexity out of the repair. Once you place your order, simply provide us with your vehicle’s VIN. Our technicians will use this information to flash the module with the precise software calibration your vehicle requires. This makes the installation straightforward. For most compatible vehicles like the GMC Canyon, Chevy Colorado, and Hummer H3, the PCM is located on the right-hand (passenger side) firewall in the engine bay. The process typically involves disconnecting the battery, unplugging the electrical connectors from the old module, unbolting it, and then installing the new one in the reverse order. Once connected and the battery is re-attached, your vehicle will recognize the new, correctly programmed module, and you’ll be ready to go.

Broad GM Compatibility

While this is a perfect solution for the 2004-2006 Canyon PCM, this module’s architecture was used across a wide range of GM vehicles. This part is a direct replacement for numerous part numbers and fits a variety of models, ensuring OEM-level function and reliability. Please verify your vehicle in the fitment list below:

• GMC Canyon: 2004-2006
• Chevrolet Colorado: 2004-2006
• Hummer H3: 2006
• GMC Envoy & Envoy XL: 2006 (4.2L)
• Chevrolet Trailblazer & Trailblazer EXT: 2006 (4.2L)
• Buick Rainier: 2006 (4.2L)
• Isuzu Ascender: 2006 (4.2L)
• Isuzu I-280 & I-350: 2006
• Saab 9-7x: 2006 (6 cylinder)

This unit is a direct replacement for part numbers: 12569773, 12588650, 12589311, 12589585, 12591647, 12591648, 12593531, 12593532, 12594430, 12594431, 12596783, 12596784, 12597521, 12597776, 12597777, 12600818, 12604438, 12604439, 12606369, 12606373, 12606374, 12606398, 12606399, 19209820, and 19209821.