Is Your GM Truck or SUV Running Rough?
If your 2003-2007 Silverado, Sierra, Tahoe, or other compatible GM vehicle is experiencing frustrating issues like erratic shifting, poor fuel economy, a persistent Check Engine Light, or even a no-start condition, the problem often points to a failing Powertrain Control Module (PCM). As the central computer of your vehicle, 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 create a cascade of problems that are often difficult to diagnose.
This replacement PCM, part number 12589463, is the definitive solution to restore your vehicle’s performance and reliability. We take the guesswork out of the repair by pre-programming the module specifically for your truck or SUV using your Vehicle Identification Number (VIN). This ensures that all factory settings, security information, and operational parameters are a perfect match for your vehicle’s original configuration. We also install the latest GM-released software updates, which can resolve common drivability issues and improve overall efficiency.
From the Diagnostic Bay
We had a 2005 Sierra 1500 come into the shop with what the owner was convinced was a failing transmission. It was shifting hard, hesitating between gears, and occasionally throwing a transmission-related error code. He had already spent a significant amount on a fluid flush and new solenoids with no improvement. After hooking up our diagnostic scanner, we noticed erratic data coming from the PCM. The module was sending corrupt signals to the transmission. We installed a VIN-programmed PCM, performed the security relearn, and the truck drove like new. It’s a classic case of the vehicle’s ‘brain’ causing symptoms elsewhere, and a reminder of how critical a fully functional PCM is.
The Solution for Your 2003-2007 Silverado PCM
Don’t let a faulty computer keep your powerful GM truck off the road. This module is a direct-fit replacement for a wide range of vehicles, including the Hummer H2, Cadillac Escalade, and various GMC/Chevrolet pickups and SUVs. It is a direct replacement for multiple service numbers, including 89017750, 12582605, 12589463, 12602802, 89017734, and 28042802. By providing us with your VIN during checkout, you receive a unit that is ready for installation, simplifying a complex repair into a manageable job for a DIY mechanic or professional technician.
Common Symptoms of a Failing GM PCM
- ✔ Check Engine Light is illuminated with various trouble codes.
- ✔ Vehicle fails to start or starts intermittently.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Engine stalling, stuttering, or misfiring.
- ✔ Communication errors with diagnostic scan tools.
- ✔ Failure to pass state emissions testing.
Replacing your failing 2003-2007 Silverado PCM with our pre-programmed unit is the most effective way to eliminate these issues and restore the factory performance you expect from your vehicle. The process is straightforward: place your order, provide your VIN, and we handle the complex programming. Once you receive the part, installation is as simple as disconnecting the battery, swapping the modules, and performing a vehicle security relearn procedure, which can typically be done without special tools.
Frequently Asked Questions
What do I need to do after installing this PCM?
After installation, you will need to perform a security relearn procedure (often called a VATS or Passlock relearn). This syncs the new PCM with your vehicle’s anti-theft system. This procedure typically involves turning the key to the ‘ON’ position for 10-15 minutes, then ‘OFF’, and repeating this cycle three times. A crankshaft variation relearn (CASE learn) may also be required, which needs a capable scan tool.
Why do you need my VIN?
Your vehicle’s VIN is essential for us to load the correct GM-certified software for your specific engine, transmission, and options package. This ensures perfect compatibility and function, just like the original module from the factory.
Is this a plug-and-play part?
Because we pre-program it to your VIN, it’s as close to plug-and-play as possible. The only additional steps are the security and possibly CASE relearn procedures mentioned above, which are required for any PCM replacement on these vehicles.
Will this fix my check engine light?
If the check engine light and associated codes are caused by a faulty PCM, then yes, this part will resolve the issue. It’s crucial to properly diagnose the problem first, as other failing sensors or components can also trigger a check engine light.
Does this PCM fit vehicles other than the Silverado?
Yes, this module fits a wide range of 2003-2007 GM trucks and SUVs, including the Sierra, Tahoe, Suburban, Yukon, Escalade, Hummer H2, and more. Please check the detailed fitment list on this page to confirm compatibility with your exact model and year.