Restore Your GM Truck’s Brain and Get Back on the Road
Is your 2004 Sierra, Silverado, Tahoe, or other GM truck running rough, stalling unexpectedly, or displaying a persistent Check Engine Light? A faulty Powertrain Control Module (PCM), the central computer of your vehicle, is often the culprit. Don’t let frustrating electrical gremlins keep your reliable truck or SUV parked. This replacement PCM, service number 12586242, is the definitive, hassle-free solution to restore your vehicle’s performance and dependability.
We take the guesswork and expensive dealership visits out of the equation. Before this unit ships, we will program it with the latest GM software updates, precisely matched to your vehicle’s unique Vehicle Identification Number (VIN). This ensures that once it arrives, it’s ready for a straightforward installation, allowing you to get your truck running right again with minimal downtime.
Common Symptoms & Your Solution
If you’re experiencing any of the following issues, a failing module is a likely cause. This Programmed 12586242 Engine Computer is designed to resolve them:
- Erratic or harsh transmission shifting
- Complete no-start or intermittent starting problems
- Poor fuel economy and engine performance
- Check Engine Light (CEL) with communication-related Diagnostic Trouble Codes (DTCs)
- Stalling or sputtering while driving
- Instrument cluster warning lights behaving abnormally
Features & Benefits
- ✔ VIN-Programmed for Your Vehicle: We flash the module to your specific VIN, eliminating the need for expensive dealership programming. This unit arrives ready for a simple installation.
- ✔ Loaded with Latest GM Software: Your computer is loaded with the most current factory calibrations, ensuring optimal engine performance, transmission function, and fuel efficiency.
- ✔ Direct OEM Replacement: Engineered to be a perfect match for a wide range of 2004 GM trucks and SUVs, guaranteeing correct fitment and communication with all other vehicle modules.
- ✔ Comprehensive Compatibility: Replaces a wide array of original service numbers, including 19299226, 89017738, YFKD, YFKF, YFKH, YFKJ, YFKX, YFXL, YFXM, YFXN, YFXP, and YHTN.
- ✔ Plug & Play Potential: In most cases, this module allows for a simple swap. For vehicles with advanced anti-theft systems, a straightforward security relearn procedure may be required after installation.
- ✔ Confidence in Your Repair: This unit is backed by our one-year replacement warranty.
A Mechanic’s Perspective: We had a 2004 Silverado 2500 work truck in the shop that was completely dead in the water. No communication with the scan tool, no fuel pump prime—nothing. The owner had already replaced multiple sensors trying to chase the problem. We identified the original PCM as the source of the failure. After installing this exact Programmed 12586242 Engine Computer, which arrived matched to the truck’s VIN, it fired up on the first turn of the key. It’s a perfect example of how getting the right, correctly programmed part saves hours of diagnostic headaches and gets you back to work.
Frequently Asked Questions
Do I need to do any programming after I install this?
No. We handle all the primary programming to your VIN before shipping. On some GM vehicles, you may need to perform a simple Security Relearn procedure, which can typically be done without special tools and takes about 30 minutes. Instructions are readily available online for this process.
How do I provide my VIN?
After you complete your purchase, you will need to send us your 17-digit VIN. You can typically add it as a note during checkout or send it to us in a message referencing your order number. We cannot ship your part until we receive your VIN.
Is this part truly ‘plug-and-play’?
For the most part, yes. The engine and transmission programming is complete. The only additional step that might be required is the Security Relearn mentioned above, which pairs the new computer to your vehicle’s anti-theft system.
Where is the PCM located on my vehicle?
On most of the compatible trucks and full-size SUVs (like the Sierra, Silverado, Tahoe, Escalade), the PCM is located in the engine bay on the driver’s side, under the battery tray. On mid-size SUVs (like the Trailblazer, Envoy, Rainier), it is typically located next to the air filter box.
How can I be sure this fits my vehicle?
The best way to confirm is to match the service number on your original computer to one of the numbers listed (12586242, 19299226, 89017738, etc.). If you are unsure, please contact us with your VIN, and we will be happy to verify compatibility for you.