Is your 2004 GM truck or SUV running rough, stalling, or throwing a check engine light?
A faulty Powertrain Control Module (PCM) can be the source of immense frustration, leading to poor performance, terrible fuel economy, and the constant worry of a breakdown. Don’t let a failing computer keep your reliable vehicle sidelined. This is the direct, professional solution to restore your vehicle’s performance and get you back on the road with confidence. This unit, part number 12586242, arrives at your door fully programmed to your vehicle’s specific VIN with the latest GM software updates, making installation straightforward and effective.
Common Symptoms of a Failing PCM & Your Direct-Fit Solution
If you’re experiencing any of the following issues, a failing engine computer is a likely culprit. This professionally programmed module is designed to be the definitive solution for these problems:
- Persistent Check Engine Light: Especially for codes like P0601, P0602, P0606, or other internal controller errors.
- Engine Performance Problems: Stalling, rough idling, hesitation during acceleration, or a noticeable loss of power.
- Poor Fuel Economy: A sudden and unexplained drop in your vehicle’s MPG.
- Erratic Shifting or Transmission Issues: The PCM plays a critical role in controlling transmission shift points.
- No-Start Condition: The engine cranks but refuses to start, often due to a lack of fuel injector or ignition coil command from the PCM.
Installing our Programmed 12586242 PCM is the most efficient way to resolve these issues and restore the factory-new operation of your vehicle’s engine and transmission systems.
Features & Benefits
- ✔ VIN-Specific Programming: We flash this computer with your vehicle’s exact VIN, ensuring it communicates perfectly with your existing modules for a true plug-and-play experience.
- ✔ Latest GM Software: Your module comes loaded with the most current GM calibration updates, which can improve fuel efficiency, emissions, and overall performance.
- ✔ Guaranteed Compatibility: This unit is a direct replacement for service numbers 12586242, 19299226, 89017738, and many others, ensuring a perfect fit and function.
- ✔ No Dealership Required: Skip the expensive trip to the dealer. This module is ready for installation right out of the box, saving you significant time and money.
- ✔ Peace of Mind Protection: This unit is backed by our one-year replacement warranty.
A Technician’s Insight: Why VIN Programming is Non-Negotiable
“In my 20+ years turning wrenches, I’ve seen it all. Back in the day, you could swap computers between similar trucks with few issues. Those days are long gone. On these 2004 GM vehicles, the PCM is the central hub. It’s not just running the engine; it’s talking to the transmission controller, the anti-lock brake system, the body control module, and even the anti-theft system (Passlock/VATS). A generic, non-programmed unit from a junkyard simply won’t work—the vehicle won’t start, or it will run in a reduced power ‘limp mode’. Getting a Programmed 12586242 PCM that’s flashed specifically to your VIN is the only way to do the job right. It ensures all systems integrate seamlessly, just as the factory intended, giving you a reliable and lasting repair.”
Frequently Asked Questions
Is this PCM truly ‘plug and play’?
Yes, this unit is programmed to your VIN to ensure it works with your vehicle’s options and systems. In some cases, a simple security relearn procedure, which you can do yourself in about 15 minutes without any special tools, may be required. We include instructions for this easy process.
How do I provide my VIN number?
After you complete your purchase, you will need to send us your vehicle’s 17-digit VIN. You can typically find this on your driver’s side door jamb sticker, your insurance card, or by looking through the driver’s side of the windshield at the dashboard.
Where is this computer located on my vehicle?
For most trucks and full-size SUVs like the Silverado, Sierra, and Suburban, the PCM is located under the hood on the driver’s side, near or under the battery tray. For mid-size SUVs like the Trailblazer and Envoy, it is typically located next to the air filter box in the engine bay.
Will this fix my check engine light?
If the check engine light is caused by an internal failure of your original PCM (common codes include P0601-P0606), then this part is the correct solution. However, it is always essential to properly diagnose your vehicle, as other issues like faulty sensors or wiring can also trigger a check engine light.
Does this fit other part numbers?
Yes, this PCM is the correct replacement for a wide range of service numbers, including 12586242, 19299226, 89017738, YFKD, YFKF, YFKH, YFKJ, YFKX, YFXL, YFXM, YFXN, YFXP, and YHTN. If your original module has one of these numbers, this is the correct part for you.