Get Your GM Truck or SUV Back on the Road, Fast.
Is your 2004 GM truck or SUV running rough, shifting erratically, or displaying a persistent Check Engine Light? A failing Powertrain Control Module (PCM) can be the root cause, creating frustrating and unpredictable driving issues. This direct-fit replacement PCM, service number 12586242, is the definitive solution to restore your vehicle’s performance and reliability. We take the guesswork and hassle out of the repair by pre-programming the unit to your vehicle’s specific VIN before it ships. This means no expensive trips to the dealership for programming—it arrives ready for a straightforward installation.
Common Symptoms & Your Solution
If you’re experiencing any of the following, a faulty PCM is the likely culprit. This unit is designed to resolve these exact problems:
- Erratic or harsh transmission shifting
- Poor fuel economy and engine performance
- Engine stalling, misfiring, or failure to start
- Check Engine Light with communication error codes (like P0601, P0606)
- Instrument cluster warning lights staying on
By replacing your old module with this professionally programmed Programmed 12586242 PCM, you’re not just swapping a part; you’re restoring the central command center of your vehicle’s engine and transmission, ensuring all systems work in harmony as the factory intended.
Features & Tangible Benefits
- ✔ VIN-Programmed for Your Vehicle: We flash the module with the latest GM software updates using your specific VIN. This ensures perfect compatibility and a true plug-and-play installation, saving you time and money.
- ✔ Restores Peak Performance: Eliminates engine hesitation, rough idling, and poor shifting, bringing back the smooth, responsive power your truck was built for.
- ✔ Guaranteed Compatibility: This unit is a direct replacement for service number 12586242 and a wide range of other compatible numbers listed in our fitment guide, including YFKD, YFXL, YHTN, and more.
- ✔ A Complete, Reliable Fix: Addresses complex electronic issues that can’t be fixed with simple mechanical repairs. This is the core solution for many stubborn diagnostic trouble codes.
- ✔ Peace of Mind Included: This unit is backed by our one-year replacement warranty.
Expert Insight: The Critical Role of VIN Programming
Many sellers offer ‘blank’ modules, leaving you stranded with a part that won’t work until you pay for expensive dealer programming. We eliminate that critical failure point. By programming the Programmed 12586242 PCM to your specific VIN before shipping, we ensure it communicates perfectly with your vehicle’s other systems—like the anti-theft system (VATS), instrument cluster, and transmission controller—right out of the box. This crucial step is the difference between a quick, successful repair and a costly, frustrating ordeal.
Don’t let a faulty computer keep your reliable GM vehicle sidelined. This is your opportunity to fix it right the first time. Simply provide your VIN after purchase, and we’ll handle the complex part, sending you a module that’s ready to get your truck, SUV, or SSR back to work. This Programmed 12586242 PCM is the smart, dependable choice for a lasting repair.
Frequently Asked Questions
How do I provide my VIN number?
After you complete your purchase, we will send you a message requesting your vehicle’s 17-digit VIN. We cannot program and ship your module until we receive this information.
Is any additional programming needed after installation?
In most cases, no dealer programming is required. However, some GM vehicles may require a simple security relearn procedure (also known as a VATS relearn) which you can typically do yourself in about 15-30 minutes. Instructions are readily available online for this process.
How can I be sure this PCM will fit my vehicle?
Please check the service number on your current PCM. This unit replaces part number 12586242 and the other service numbers listed in the detailed description. Matching one of these numbers ensures a perfect fit for your 2004 GM truck or SUV.
What if my original part number is not on the list?
If your part number is not listed, please contact us with your vehicle’s year, make, model, and VIN. Our team of experts can help you find the correct module for your specific application.
What does ‘flashed with the newest updates’ mean?
It means we load the module with the most current software calibration available from GM for your vehicle. This can often resolve issues that were present in the original factory programming, leading to improved performance and efficiency.