Is Your Truck Running Rough? Get Back on the Road Fast.
There’s nothing more frustrating than a powerful truck that won’t run right. If your 2004 Silverado 3500 is suffering from stalling, erratic shifting, a persistent check engine light, or a complete no-start condition, the problem often points to a failing Powertrain Control Module (PCM). This isn’t just an inconvenience; it’s downtime that costs you time and money. This VIN-programmed PCM is the definitive solution to restore your truck’s performance and reliability, getting you back to work with confidence.
Common Symptoms & Your Solution
A failing PCM can cause a wide range of confusing issues. You might be experiencing one or more of the following:
- Check Engine Light (CEL) with communication-related trouble codes (e.g., U-codes).
- Poor Engine Performance: Rough idling, hesitation, misfires, or reduced fuel economy.
- Transmission Problems: Harsh or incorrect shifting patterns.
- No-Start Condition: The engine cranks but refuses to start.
- Intermittent Stalling: The vehicle shuts off unexpectedly while driving.
Replacing your old computer with our precisely programmed 2004 Silverado 3500 PCM 12586242 is the most effective way to resolve these complex electronic issues and restore your vehicle’s factory-grade operation.
Features & Benefits
- โ Plug & Drive Installation: This module arrives programmed to your truck’s specific VIN. No expensive trips to the dealership for flashing are required.
- โ Updated GM Software: We flash each unit with the latest updates from General Motors, ensuring optimal engine performance, fuel efficiency, and emissions control.
- โ Guaranteed Compatibility: This is a direct replacement for service number 12586242 and a wide range of other compatible service numbers, ensuring a perfect fit and function.
- โ Solves Frustrating Issues: Puts an end to persistent electronic gremlins that can be difficult and costly to diagnose.
- โ This unit is backed by our one-year replacement warranty.
An Expert’s Note on Diagnostics
“I’ve seen countless truck owners replace sensors, coils, and even fuel pumps trying to fix a performance issue, only to find the root cause was the PCM all along. A failing computer can send false signals, making other good parts seem faulty. Before you spend another dollar on guesswork, consider the brain of the operation. A correctly programmed PCM ensures all systems are communicating and functioning as the engineers intended. This 2004 Silverado 3500 PCM 12586242 is often the one-part fix that solves a dozen symptoms.”
Frequently Asked Questions
How do I provide my VIN number?
After you complete your purchase, simply send us a message with your vehicle’s 17-digit VIN. We cannot program and ship your module without this information.
Will I need to do any additional programming after installation?
No. This PCM comes fully programmed to your VIN. In most cases, it is a simple plug-and-play installation. However, some vehicles may require a security relearn procedure (CASE relearn), which can typically be done without special tools. Instructions are widely available online for this simple process.
Is this compatible if my old part has a different service number?
Yes. This unit is a direct replacement for several service numbers, including 12586242, 19299226, 89017738, YFKD, YFKF, YFKH, and many others listed in the description. As long as your vehicle is on the fitment list, we will program it to work perfectly.
What is the difference between a PCM, ECM, and ECU?
These terms are often used interchangeably. PCM (Powertrain Control Module) is the most accurate term for this part, as it controls both the engine and transmission. ECM (Engine Control Module) and ECU (Engine Control Unit) are other common names for the same component.
Where is this module located on my 2004 Silverado 3500?
On the 2004 Silverado and Sierra trucks, the PCM is typically located on the driver’s side of the engine bay, under the battery tray.