Get Your Truck Back to Peak Performance
Is your 2004 Silverado 3500 feeling sluggish, shifting erratically, or refusing to start? A failing Powertrain Control Module (PCM) is often the culprit, acting as the brain of your engine and transmission. Don’t let a faulty computer keep your workhorse sidelined. This is the definitive, hassle-free solution to restore your truck’s power and reliability. We provide a genuine OEM-quality PCM, service number 12586242, that is professionally programmed to your truck’s specific Vehicle Identification Number (VIN) before it ever leaves our facility. This ensures a smooth installation process and gets you back on the road, and back to work, faster.
Common Symptoms of a Failing PCM & Your Solution
If you’re experiencing any of the following issues, a faulty engine computer is the likely cause. This pre-programmed module is designed to be the final fix for these frustrating problems:
- Persistent Check Engine Light (CEL) that won’t go away
- Engine stalling, stumbling, or running rough
- Complete no-start or intermittent starting problems
- Poor fuel economy and loss of power
- Harsh or incorrect transmission shifting
- Communication errors with diagnostic scan tools
Features & Benefits
- ✔ VIN-Programmed for Your Truck: No expensive trips to the dealer for programming. This module arrives ready for installation, saving you critical time and money.
- ✔ Loaded with Latest GM Updates: We flash the unit with the newest factory software, ensuring optimal engine performance, fuel efficiency, and transmission logic.
- ✔ Guaranteed Compatibility: A direct replacement for service number 12586242 and a wide range of other part numbers, ensuring a perfect fit and function for your vehicle.
- ✔ Solves Frustrating Electrical Gremlins: Puts an end to confusing issues like stalling, erratic behavior, and persistent diagnostic trouble codes (DTCs).
- ✔ This unit is backed by our one-year replacement warranty. Drive with confidence knowing your purchase is protected against defects.
Expert Insight: Why Pre-Programming is a Game-Changer
As a technician with over two decades of experience, I’ve seen countless DIY jobs get stuck at the final step: computer programming. For these 2004 GM trucks, the PCM is tied into the vehicle’s security system (Passlock/VATS). Installing a blank computer without programming will result in a no-start condition every time. By flashing the module with your VIN and the latest GM calibrations before we ship, we handle the most complex part of the job for you. This eliminates the need for expensive dealer-specific tools and turns a difficult electronic repair into a manageable replacement you can trust.
Frequently Asked Questions
How do I provide my VIN for programming?
After you complete your purchase, simply send us a message with your 17-digit Vehicle Identification Number (VIN). We cannot ship your part until we receive this information, as the programming is essential for the part to function in your vehicle.
Will I need to do anything else after installation?
In most cases, this module is ready to go. However, some GM vehicles may require a simple security relearn procedure, which involves a series of key cycles. We include instructions for this straightforward process. A Crankshaft Variation Relearn (CASE) may also be needed with a scan tool for optimal performance, which can be performed by most local repair shops.
How can I be sure this fits my vehicle?
This PCM fits a wide variety of 2004 GM trucks and SUVs. The best way to confirm is to match the service number on your current computer to 12586242 or any of the other compatible numbers listed in the description (e.g., YFKD, YFKF, YFKH). Providing us with your VIN during checkout also allows us to double-check compatibility before programming.
Where is the PCM located on my Silverado or Sierra?
On most 2004 GM full-size trucks like the Silverado, Sierra, Tahoe, and Suburban, the Powertrain Control Module is located in the engine bay on the driver’s side, typically under or next to the battery tray.
What if I have a problem after installation?
We are here to help. If you encounter any issues, please contact us immediately. Our team of experts can help diagnose the problem, and remember, this unit is backed by our one-year replacement warranty.