Restore Peak Performance to Your GM Truck or SUV
Is your 2003-2007 Silverado, Sierra, or Tahoe suffering from baffling engine problems? Issues like erratic shifting, poor fuel economy, a persistent Check Engine Light, or even a no-start condition often point to a failing Powertrain Control Module (PCM). As the central computer for your engine and transmission, a faulty PCM can create a cascade of frustrating and difficult-to-diagnose symptoms. This replacement PCM, part number 12582605, is the definitive solution to restore your vehicle’s reliability and drivability.
This isn’t just a generic part off the shelf. We provide a fully programmed module specific to your vehicle. Upon purchase, you will provide us with your vehicle’s VIN. Our technicians will then flash the unit with the latest GM-certified software and calibrations for your exact make, model, and engine configuration. This ensures a seamless, plug-and-play installation process, getting you back on the road faster without the need for an expensive trip to the dealership for programming.
From the Diagnostic Bay
We had a 2005 Sierra 2500 come into the shop with a complaint of intermittent stalling and a transmission that seemed to have a mind of its own. The owner had already replaced the throttle body and multiple sensors chasing the problem, with no success. After hooking up our diagnostic scanner, we noticed erratic data readings from several key sensors, but the sensors themselves tested fine. This is a classic sign of a failing PCM. The internal processors were struggling, corrupting the data signals. We installed a VIN-programmed 2003-2007 Silverado PCM, performed the security relearn, and the truck ran like it just rolled off the factory floor. It’s a reminder that sometimes the problem lies with the brain, not the limbs.
Is Your Vehicle Showing Signs of PCM Failure?
A failing PCM can manifest in numerous ways. If you’re experiencing any of the following issues, your engine computer may be the culprit. This is especially true if you’ve already checked the related sensors and wiring without finding a fault.
- ✔ Check Engine Light is on with various communication or processor-related fault codes (e.g., P0601, P0606).
- ✔ Your engine cranks but refuses to start.
- ✔ Unexplained drops in fuel efficiency.
- ✔ The transmission shifts harshly, erratically, or gets stuck in one gear.
- ✔ Noticeable loss of engine power and poor acceleration.
- ✔ Intermittent stalling or rough idling for no apparent reason.
- ✔ Communication issues with your OBDII scan tool.
Why Choose Our Pre-Programmed 2003-2007 Silverado PCM?
This module is a direct replacement for a wide array of popular GM trucks and SUVs from the mid-2000s. It is a reliable and cost-effective alternative to sourcing a new part from a dealer. We handle the complex programming, saving you time and money. Simply install the module, perform the vehicle’s security relearn procedure, and you’re ready to go. This unit is a direct replacement for multiple service numbers, including 89017750, 12582605, 12589463, 12602802, 89017734, and 28042802. Please verify your original part number to ensure compatibility.
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 function, including fuel injection, ignition timing, emissions systems, and shift points, to ensure optimal performance and efficiency.
Is this module ready to install out of the box?
Yes, this module comes pre-programmed to your vehicle’s specific VIN with the latest GM software updates. After physical installation, you will need to perform a security relearn procedure (often called a CASE relearn) so the module can communicate with your vehicle’s anti-theft system. This procedure can typically be done without special tools.
How do I provide my VIN number?
After you complete your purchase, you will receive instructions on how to send us your 17-digit Vehicle Identification Number (VIN). We cannot ship your part until we receive this information, as the programming is essential.
What if my original service number isn’t 12582605?
This PCM is a compatible replacement for several service numbers, including 89017750, 12589463, and 12602802, among others listed. As long as your original module carries one of the compatible service numbers, this part will work for your vehicle.
Will this fix my Check Engine Light?
If the Check Engine Light is caused by an internal failure of your original PCM, then yes, this replacement part will resolve the issue. However, it’s crucial to properly diagnose the vehicle first, as the light could be on for other reasons, such as a faulty sensor or wiring problem.