Is Your Chevy Express Van Running Rough?
The Powertrain Control Module, or PCM, is the central computer of your 2005-2007 Express 1500 Van. It’s responsible for managing everything from fuel injection and ignition timing to transmission shifting and emissions control. When it starts to fail, it can cause a wide range of frustrating and difficult-to-diagnose problems. You might be experiencing a persistent check engine light, poor fuel economy, stalling, or even a no-start condition. Don’t let a faulty computer keep your reliable workhorse off the road. This direct-fit PCM is the solution to restore your van’s performance and dependability.
From the Diagnostic Bay
We had a 2006 Express 2500 come into the shop with an intermittent stalling issue that was driving the owner crazy. He had already replaced the crank sensor, cam sensor, and even the fuel pump based on various codes and guesses. The van would run fine for days, then suddenly die at a stoplight. After hours of diagnostics, we traced the issue to an internal fault in the PCM that would only manifest when it reached a certain temperature. A new, properly programmed module solved the problem instantly. It’s a classic case of how a failing PCM can mimic other component failures, costing you time and money on unnecessary parts.
Symptoms of a Failing Powertrain Control Module
- ✔ Persistent Check Engine Light (CEL) with various, often unrelated, trouble codes.
- ✔ Engine stalling, stumbling, or misfiring, especially when warm.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Complete no-start or no-spark condition.
- ✔ Failure to communicate with a diagnostic scan tool.
- ✔ Issues with emissions testing.
The Simple, Reliable Solution: A VIN-Programmed 2005-2007 Express 1500 PCM
Replacing the PCM on these GM vehicles isn’t just about swapping a box. The module must be programmed with your vehicle’s specific Vehicle Identification Number (VIN) and equipped with the latest software from General Motors to function correctly. Our service eliminates the guesswork and the need for expensive dealership programming. When you order from us, we handle the critical programming step for you. Simply provide your VIN during checkout, and we will flash the module with the correct factory software and updates for your exact vehicle configuration. It arrives at your door ready for installation, saving you a trip to the dealer and significant costs.
This module is a direct replacement for part numbers 12589462, 12602801, and 89017749 and fits a wide range of GM trucks and vans from 2004-2007, including the Silverado, Sierra, Savana, Suburban, and more. Please verify the fitment list to ensure compatibility with your specific model and engine.
Installation Note
After installing your new PCM, a security relearn procedure (often called a CASE relearn or Crankshaft Variation Relearn) will need to be performed with a capable scan tool. This is a standard procedure required by GM to sync the new module with your vehicle’s anti-theft system and crankshaft position sensor. This is not a defect but a necessary final step for a successful installation.
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 the engine and transmission to ensure optimal performance, fuel economy, and emissions.
Is this part truly plug-and-play?
It is as close as it gets. We program it to your VIN so it’s ready to be installed. However, you will need to perform a security/CASE relearn procedure with a suitable scan tool after installation for it to function correctly with your vehicle.
How do I provide my VIN?
After you complete your purchase, you will receive instructions on how to send us your vehicle’s 17-digit VIN. We cannot ship your part until we receive this information, as the programming is essential.
Will this fix my check engine light?
If the check engine light is caused by a faulty PCM, then yes, this part will resolve the issue. It’s crucial to have your vehicle properly diagnosed to confirm the PCM is the root cause before ordering.
What part numbers does this module replace?
This module is a direct replacement for GM part numbers 12589462, 12602801, and 89017749.