Get Your Truck Running Right Again
Is your 2004 Silverado 2500, Sierra, or other GM truck giving you headaches? A failing Powertrain Control Module (PCM) can bring your vehicle to a standstill, causing frustrating and unpredictable problems. This isn’t just an inconvenience; it’s a roadblock to getting your work done. This direct-fit PCM, part number 12586242, is the definitive solution. It arrives at your door fully programmed to your vehicle’s specific VIN with the latest GM software updates, making installation straightforward and getting you back on the road with confidence.
Common Symptoms & Your Solution
If you’re experiencing any of the following issues, a faulty engine computer is the likely culprit. This unit is designed to solve them:
- Complete no-start or intermittent starting problems
- Poor fuel economy and engine performance
- Check Engine Light with communication error codes (like U0100)
- Harsh or erratic automatic transmission shifting
- Apparent sensor failures even after replacing the sensors
- Stalling or rough idling
Instead of wrestling with a used module from a junkyard or paying steep dealership prices for programming, this unit offers a reliable, plug-and-play fix. We handle the complex programming so you can handle the installation. This is the most efficient way to replace your failing 2004 Silverado 2500 PCM and restore your truck’s core functionality.
Features & Benefits
- โ VIN-Programmed for Your Truck: Arrives ready to install, flashed with your vehicle’s unique information for seamless integration. No extra trips to the dealer are required.
- โ Updated GM Software: Programmed with the newest stable software from General Motors to optimize engine efficiency, transmission performance, and emissions.
- โ Guaranteed Compatibility: This module is a direct replacement for service numbers 12586242, 19299226, 89017738, and many others, ensuring a perfect match.
- โ Restored Performance: Cures common drivability issues, bringing back the reliable power and smooth operation you depend on.
- โ This unit is backed by our one-year replacement warranty.
An Expert’s Note on GM PCMs
“As a technician, I’ve seen countless hours and dollars wasted on chasing phantom electrical issues that all trace back to a failing PCM. The P59 controller used in these 2004 GM trucks is a workhorse, but after two decades, internal components can fail. The most critical step in replacement isn’t just finding the part; it’s the programming. A module without the correct VIN-specific software is just a metal box. By providing a unit that’s pre-flashed with the latest updates, we eliminate the biggest hurdle for both DIY mechanics and professional shops, ensuring the repair is done right the first time.”
Frequently Asked Questions
How do I provide my VIN number?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). We will provide clear instructions on how to do this. We cannot program and ship your module without it.
Is any additional programming required after installation?
No, this PCM is programmed to your VIN and is ready for installation. In most cases, it is a simple plug-and-play process. Some vehicles may require a security relearn procedure (CASE relearn), which can often be done without special tools. Instructions can be provided upon request.
How do I find my part or service number to confirm a match?
Your original PCM will have a sticker on it containing the hardware number and service number (SERV. NO.). You can match this number to the list provided in our description to ensure compatibility. This specific 2004 Silverado 2500 PCM replaces a wide range of service numbers.
Will this fix my check engine light?
If the check engine light is caused by an internal failure of your old PCM, this unit will resolve the issue. However, if there are other mechanical or electrical problems with your vehicle (e.g., a bad sensor), this part will not fix them. It is always best to have your vehicle properly diagnosed.
What is the warranty on this part?
This unit is backed by our one-year replacement warranty. This provides coverage against defects for a full year from the date of purchase, giving you peace of mind.