Get Your Truck Back to Peak Performance
Is your 2004 GMC Sierra 2500 running rough, throwing confusing check engine codes, or refusing to start? A failing Powertrain Control Module (PCM) is often the culprit, acting as the brain of your engine and transmission. This isn’t just a replacement part; it’s a complete, plug-and-play solution designed to restore the reliability and power you depend on. We professionally program this module to your truck’s specific Vehicle Identification Number (VIN), ensuring it works correctly right out of the box, with no expensive trips to the dealership required.
Common Symptoms & Your Solution
If you’re experiencing issues like a persistent Check Engine Light (CEL), poor fuel economy, erratic shifting, engine stalling, or a complete no-start condition, your original PCM may have failed. This unit is the definitive solution for these frustrating problems, directly replacing GM service number 12586242 and a wide range of compatible service numbers. By ordering our pre-programmed 2004 GMC Sierra 2500 PCM, you are getting a reliable fix that restores factory performance and communication between all your vehicle’s critical systems.
- โ Programmed to Your VIN: We flash the unit with your truck’s exact VIN and the latest GM software updates before it ships. This ensures perfect compatibility and function, saving you from dealership programming fees.
- โ True Plug-and-Play Installation: Once you receive the module, the installation is straightforward. In most cases, no complicated security relearn procedures are needed, getting you back on the road faster.
- โ Guaranteed Compatibility: This computer is a direct replacement for service numbers 12586242, 19299226, 89017738, YFKD, YFKF, YFKH, YFKJ, YFKX, and many more, covering a wide range of GM trucks and SUVs.
- โ Restores Lost Power & Efficiency: A new, correctly programmed PCM can resolve poor engine performance, hesitation, and bad fuel mileage, making your truck run like it was designed to.
- โ This unit is backed by our one-year replacement warranty. Purchase with confidence, knowing your investment is protected.
Expert Insight: Why VIN Programming is Non-Negotiable
As a veteran technician, I’ve seen countless vehicle owners try to save a few dollars by installing a used computer from a salvage yard. The result is almost always the same: a truck that still won’t start or runs even worse. That’s because the PCM is coded to the original vehicle’s specific options, security system (Passlock/VATS), and emissions equipment. Our VIN programming service isn’t just a convenience; it’s a critical step that aligns the new computer with your truck’s unique identity. We ensure the software is correct, preventing communication errors and saving you from a world of diagnostic headaches.
Don’t let a faulty computer keep your truck sidelined. This is the reliable, straightforward solution you need. Simply provide us with your VIN after purchase, and we’ll handle the rest. Get the right part, programmed correctly, and get your 2004 GMC Sierra 2500 PCM working for you again.
Frequently Asked Questions
What is a PCM and why is it important?
The Powertrain Control Module (PCM), often called the Engine Control Unit (ECU), is your vehicle’s central computer. It controls everything from fuel injection and ignition timing to transmission shifting and emissions. A properly functioning PCM is essential for your truck’s performance, reliability, and fuel economy.
How do I provide my VIN?
After you complete your purchase, simply send us a message with your 17-digit Vehicle Identification Number (VIN). You can find this on your vehicle’s dashboard (visible through the windshield), on the driver’s side door jamb sticker, or on your insurance and registration documents.
Will I need to do any programming after I install it?
No. This 2004 GMC Sierra 2500 PCM arrives pre-programmed to your specific VIN. The unit is ready for installation right out of the box, with no need for a scan tool or a visit to a mechanic for programming.
How can I confirm this part is correct for my vehicle?
The best way is to match the service number on your current computer to one of the numbers listed, such as 12586242, YFKX, etc. This listing also provides a detailed fitment list. If you are still unsure, please send us your VIN, and we will be happy to verify compatibility for you.
Will this require a security relearn procedure?
For most 2004 GM vehicles, our programming process bypasses the need for a security relearn. The vehicle should start and run upon installation. However, in a very small number of cases, a simple 10-minute key-cycle procedure may be required, for which we can provide easy-to-follow instructions.