End the Frustration of a Failing Engine Computer
Is your Buick Rainier, Trailblazer, or Envoy suddenly acting possessed? Unpredictable stalling, a check engine light that won’t quit, and rough, hesitant performance can turn any drive into a stressful ordeal. These aren’t just annoyances; they’re classic signs that the brain of your vehicle, the Powertrain Control Module (PCM), is failing. This isn’t just a part; it’s the key to restoring the smooth, reliable performance you depend on. We offer a direct, hassle-free solution: a replacement PCM, programmed specifically to your vehicle’s VIN with the latest GM software updates, ready to install right out of the box.
Warning Signs and How to Overcome Them
A faulty PCM can manifest in numerous ways, often mimicking other component failures. Recognizing these symptoms is the first step toward a confident repair. This module is the definitive solution for:
- ✔ Persistent Check Engine Light (CEL) with codes like P0601, P0602, P0606, or U0100.
- ✔ Unexplained engine stalling or difficulty starting, leaving you stranded.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ A noticeable drop in fuel economy, costing you money at the pump.
- ✔ Communication issues with diagnostic scan tools.
- ✔ The engine running rough, misfiring, or hesitating during acceleration.
Guided Installation to Restore Your Drive
Replacing your 2006 Rainier PCM is more straightforward than you might think. Because we program it beforehand, you avoid a costly trip to the dealership for flashing. Follow these simple steps for a successful installation.
- Safety First: Begin by disconnecting the negative terminal from your vehicle’s battery. This prevents any electrical shorts during the process.
- Locate the Old Module: On most compatible models like the Rainier and Trailblazer, the PCM is located in the engine bay on the driver’s side, near the firewall or inner fender.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that need to be released. Once disconnected, unbolt the module from its mounting bracket.
- Install the New PCM: Mount your new, pre-programmed PCM securely onto the bracket and reconnect the wiring harnesses. Ensure they click firmly into place.
- Power Up: Reconnect the negative battery terminal.
- Perform Security Relearn: In some cases, a simple security relearn procedure is needed. This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating two more times before starting the engine. This syncs the new module with your vehicle’s anti-theft system.
Tailored Fit for Your Ride
This module is a direct replacement for a wide range of GM trucks and SUVs. Please verify your vehicle is on this list and provide your VIN upon checkout for precise programming. This computer is compatible with 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.
- BUICK RAINIER 2006 (4.2L)
- CHEVROLET COLORADO 2004-2006
- CHEVROLET TRAILBLAZER & TRAILBLAZER EXT 2006 (4.2L)
- GMC CANYON 2004-2006
- GMC ENVOY & ENVOY XL 2006 (4.2L)
- HUMMER H3 2006
- ISUZU ASCENDER 2006 (4.2L)
- ISUZU I-280 2006
- ISUZU I-350 2006
- SAAB 9-7X 2006 (6 cylinder)
Frequently Asked Questions
What exactly is VIN programming?
VIN programming is the process of loading your vehicle’s specific Vehicle Identification Number (VIN) and its unique software calibrations onto the PCM. This ensures the module communicates perfectly with your engine, transmission, and anti-theft system, just like the original one from the factory.
Is this part truly plug-and-play?
Yes, for over 95% of vehicles. Because we program it to your VIN, it eliminates the need for dealer flashing. In rare cases, a simple ‘security relearn’ procedure (which you can do yourself in 15-30 minutes) is required. We provide instructions for this easy process.
How do I provide my VIN?
After you complete your purchase, you will receive an email prompting you for your vehicle’s 17-digit VIN. You can also add it to the ‘notes’ section during checkout. We cannot ship your part until we have this information.
Will this fix my specific check engine light codes?
This module is a guaranteed fix for internal processor fault codes (like P0601 or P0606). If your codes are for specific sensors (like an oxygen sensor), you should diagnose and replace those sensors first. A faulty PCM can sometimes cause false sensor codes, but it’s always best practice to check the related circuits first.
Do I need to send my old PCM (core) back?
No core charge or return is required for this particular part. You can recycle your old module locally.