Is Your 2006 Isuzu I-350 Running Rough? The PCM Might Be the Culprit.
If you’re experiencing frustrating issues like a persistent check engine light, poor fuel economy, erratic shifting, or even a no-start condition in your 2006 Isuzu I-350, the problem may lie with a failing Powertrain Control Module (PCM). As the central computer of your truck, the PCM is responsible for managing everything from the engine’s air-fuel mixture and ignition timing to the transmission’s shift points. When it begins to fail, it can cause a cascade of problems that are often difficult to diagnose.
This isn’t just a replacement part; it’s a direct solution. We provide a fully programmed PCM, flashed with the latest GM-authorized software updates specifically for your vehicle. By providing us with your Vehicle Identification Number (VIN) at checkout, you ensure that the module you receive is a true plug-and-play component, eliminating the need for expensive trips to the dealership for programming. This module is the key to restoring your truck’s original performance, reliability, and efficiency.
From the Diagnostic Bay
We had a 2006 GMC Canyon (which uses the same platform as the I-350) come into the shop with a bizarre issue. The owner had replaced the throttle body, mass airflow sensor, and all four oxygen sensors chasing a lean condition code (P0171) and a rough idle. Nothing worked. After hours of diagnostics, we hooked up our scope to the injector control circuits. We found that the PCM was sending an erratic signal to injector #3, causing it to stay open too long intermittently. A new, properly programmed PCM solved the problem instantly. It’s a classic example of how a failing computer can mimic the symptoms of multiple other parts, leading to wasted time and money.
Common Symptoms of a Failing PCM
- ✔ Check Engine Light is illuminated with various trouble codes (DTCs).
- ✔ Your vehicle fails to start or has difficulty starting.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ The engine stalls, stutters, or misfires while driving.
- ✔ Harsh or unpredictable automatic transmission shifting.
- ✔ The engine runs rough or idles poorly.
- ✔ Communication errors with diagnostic scan tools.
Compatibility and Installation for Your 2006 Isuzu I-350 PCM
This Powertrain Control Module is a direct-fit replacement for a wide range of GM trucks and SUVs from the mid-2000s. Installation is straightforward for a DIY mechanic with basic tools. The module is typically located on the right-hand (passenger side) firewall in the engine bay. Simply disconnect the battery, unplug the electrical connectors from the old module, unbolt it, and install the new one in its place. Once the new module is installed and the battery is reconnected, your vehicle will be ready to go with no further programming required.
This module is a direct replacement for the following 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.
Guaranteed Fitment For:
- 2004-2006 Chevrolet Colorado
- 2004-2006 GMC Canyon
- 2006 Buick Rainier (4.2L)
- 2006 Hummer H3
- 2006 Isuzu Ascender (4.2L)
- 2006 Isuzu I-280
- 2006 Isuzu I-350
- 2006 Chevrolet Trailblazer & Trailblazer EXT (4.2L)
- 2006 GMC Envoy & Envoy XL (4.2L)
- 2006 Saab 9-7x (6 cylinder)
Frequently Asked Questions
Why do you need my VIN?
Your vehicle’s VIN (Vehicle Identification Number) is essential for us to load the correct, factory-specified software for your truck’s exact configuration, including engine, transmission, and emissions equipment. This ensures perfect compatibility and function right out of the box.
Is this PCM ready to install when I receive it?
Yes! The module arrives fully programmed to your VIN and flashed with the latest software updates. It is a true plug-and-play solution. In some cases, a security relearn procedure may be necessary, which is a simple process that can be done without any special tools.
Will this fix my check engine light?
If the check engine light is caused by a faulty PCM, then this replacement will resolve the issue. However, it’s crucial to ensure that the codes are not being caused by other failing components like sensors or wiring. We always recommend a proper diagnosis before ordering.
Where is the PCM located on my 2006 Isuzu I-350?
On the 2006 Isuzu I-350, as well as the Chevy Colorado and GMC Canyon, the PCM (or ECM) is located in the engine compartment on the right-hand (passenger side) firewall.
Do I need to send my old module (core) back?
No core charge or return is required for this part. You can keep or dispose of your old module at your convenience.