Is your 2004-2006 GMC Canyon, Chevy Colorado, or Hummer H3 suffering from perplexing engine issues, erratic shifting, or a persistent check engine light? The Powertrain Control Module (PCM), the central computer of your vehicle, is often the root cause of these frustrating problems. This replacement PCM, part number 19209821, is the definitive solution to restore your truck’s performance, reliability, and efficiency. It arrives at your door pre-programmed with the latest official GM software, specifically flashed to your vehicle’s unique Vehicle Identification Number (VIN). This eliminates the need for expensive dealership programming, making the repair process straightforward and cost-effective.
Is Your Truck Showing Signs of PCM Failure?
A failing PCM can manifest in numerous ways, often mimicking other component failures. If you’re experiencing any of the following symptoms, a faulty engine computer could be to blame. Proper diagnosis is key, but these are strong indicators that your module needs attention.
- ✔ Persistent Check Engine Light (CEL) with various trouble codes.
- ✔ Rough or unstable idling.
- ✔ Unexplained drops in fuel economy.
- ✔ Harsh, delayed, or incorrect gear shifting.
- ✔ The engine cranks but refuses to start.
- ✔ Stalling or hesitation during acceleration.
- ✔ Communication errors with diagnostic scan tools.
- ✔ Misfire codes even after replacing plugs, coils, and injectors.
From the Diagnostic Bay
We had a 2005 Chevy Colorado come into the shop that was driving the owner crazy. It had a random misfire on cylinder 3 that would come and go. The owner had already replaced the spark plug, ignition coil, and fuel injector twice. He was about to give up. We hooked up our scope and saw the injector driver signal from the PCM was dropping out intermittently. The wiring was perfect. We installed one of our VIN-programmed PCMs, performed the security relearn, and the truck ran like new. It’s a classic case where mechanics chase their tails replacing good parts when the computer itself is the silent culprit.
Why Choose Our Pre-Programmed 2004-2006 Canyon PCM?
When you order from us, you’re not just getting a part; you’re getting a complete, ready-to-install solution. The core of our service is the meticulous programming process. We take your vehicle’s VIN and use it to load the exact, factory-correct software and calibrations directly from GM’s database. This ensures that the module communicates flawlessly with all other systems in your truck, from the transmission to the anti-lock brakes. This critical step guarantees optimal engine performance, correct transmission shift points, and proper emissions control, just as the engineers intended.
This module is a direct replacement for a wide range of original part numbers, ensuring broad compatibility across several GM platforms. It is meticulously inspected to ensure reliability and longevity. By installing this module, you are restoring the central nervous system of your vehicle’s powertrain with a component that is prepared for your specific application.
Simple Installation Process:
- ✔ Provide Your VIN: After placing your order, simply send us your 17-digit VIN. This is crucial for the programming process.
- ✔ Install the Module: Disconnect the battery. Locate your old PCM (typically on the right-hand firewall), unplug the connectors, and swap in the new module.
- ✔ Perform Security Relearn: Most vehicles will require a simple security relearn procedure, which can be done without special tools. This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating two more times to sync the new PCM with your vehicle’s anti-theft system.
Full Compatibility List:
This PCM is the correct replacement for the following vehicles and part numbers. Please verify your vehicle is on this list before ordering.
Compatible Vehicles:
- 2004-2006 GMC CANYON
- 2004-2006 CHEVROLET COLORADO
- 2006 BUICK RAINIER (4.2L)
- 2006 HUMMER H3
- 2006 ISUZU ASCENDER (4.2L)
- 2006 ISUZU I-350
- 2006 ISUZU I-280
- 2006 CHEVROLET TRAILBLAZER & EXT (4.2L)
- 2006 GMC ENVOY & XL (4.2L)
- 2006 SAAB 9-7X (6 cylinder)
Replaces 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, 19209821.
Frequently Asked Questions
What is a PCM and what does it do?
The Powertrain Control Module (PCM) is your vehicle’s main computer. It controls all aspects of engine and transmission operation, including fuel mixture, ignition timing, and transmission shift points, to ensure optimal performance and efficiency.
Is this part difficult to install?
The physical installation is straightforward for anyone with basic mechanical skills. It involves disconnecting the battery and swapping the module. The only additional step is a simple security relearn procedure that you can do yourself with just the ignition key. Instructions are widely available online.
How do I provide my VIN after purchase?
After you complete your purchase, you will receive an email with instructions on how to reply with your 17-digit VIN. You can also add it as a note during checkout. We cannot ship your order until we receive the VIN.
Is this a true plug-and-play solution?
Because we program it to your VIN, it is as close to plug-and-play as possible. It will have the correct software for your vehicle’s options. The only thing you may need to do is the security relearn, which syncs the new module to your keys.
Will this fix my check engine light?
If the check engine light is caused by an internal failure of the PCM, then yes, this will resolve the issue. However, it’s essential to ensure that the codes are not being caused by other faulty sensors or components on the vehicle. A proper diagnosis is always recommended.