Restore Your Vehicle’s Brainpower and Performance
Is your 2004 GM truck or SUV suffering from frustrating issues like a persistent check engine light, erratic shifting, poor fuel economy, or even a no-start condition? These are classic signs of a failing Powertrain Control Module (PCM), the central computer that manages your engine’s performance. This direct-replacement PCM, service number 12586242, is the definitive solution to get your vehicle back on the road, running just as the factory intended.
We take the guesswork out of the repair. Before this unit ships, we flash it with the latest official GM software updates, precisely programmed to your vehicle’s unique Vehicle Identification Number (VIN). This ensures seamless integration and communication with your vehicle’s existing systems, a critical step for a successful and lasting repair. By using a properly VIN-matched module like this Programmed 12586242 PCM, you restore not just function, but also the reliability you depend on daily.
Common Symptoms & Your Solution
If you’re experiencing any of the following, a faulty PCM is the likely culprit:
- Check Engine Light (CEL) with communication-related codes (e.g., P0601, P0606)
- Rough or unstable idle
- Vehicle won’t start or stalls intermittently
- Poor acceleration and overall engine performance
- Decreased fuel efficiency
- Harsh or incorrect automatic transmission shifting
Installing this pre-programmed engine computer directly addresses these issues at their source, providing a reliable and effective fix.
Features & Benefits
- โ VIN-Programmed for Your Vehicle: Simply provide your VIN after purchase, and we’ll program the module to ensure it’s a perfect match for your truck or SUV’s specific configuration.
- โ Plug-and-Play Ready: Arrives ready for installation. After a simple security relearn procedure (instructions provided), your vehicle will be back up and running. No expensive dealership visits required.
- โ Updated GM Software: Flashed with the newest updates from General Motors to optimize engine efficiency, transmission performance, and emissions control.
- โ Broad Compatibility: This Programmed 12586242 PCM is a direct replacement for multiple service numbers, including 19299226, 89017738, YFKD, YFKF, YFKH, YFKJ, YFKX, YFXL, YFXM, YFXN, YFXP, and YHTN.
- โ Guaranteed Confidence: This unit is backed by our one-year replacement warranty.
An Expert’s Note on GM Security Systems: On these 2004 GM vehicles, the PCM is a key part of the Passlock or VATS anti-theft system. A non-programmed or incorrectly programmed module will prevent the engine from starting. That’s why our VIN-programming service is not just a convenienceโit’s essential. We ensure the computer is ready to communicate with your vehicle’s Body Control Module and ignition system, making the final security relearn process smooth and successful for you.
Frequently Asked Questions
What information do I need to provide after purchase?
After you complete your purchase, you will need to send us your vehicle’s 17-digit VIN. We cannot program or ship the PCM without it. This ensures the module is a perfect match for your vehicle’s engine, transmission, and options.
Is this part difficult to install?
The physical installation is straightforward for most DIY mechanics. It typically involves disconnecting the battery, unplugging the electrical connectors from the old PCM, unbolting it, and installing the new one. The most critical step after installation is the security relearn procedure, which can be done without special tools.
What is the security relearn procedure?
The security relearn procedure syncs the new PCM with your vehicle’s anti-theft system. It typically involves turning the key to the ‘ON’ position for 10 minutes, then ‘OFF’ for 10 seconds, and repeating this cycle three times. We include simple, clear instructions to guide you through it.
Will this fix my specific problem?
This PCM will correct any issues directly caused by a failing engine computer. While the symptoms listed are very common for PCM failure, we always recommend a proper diagnosis by a qualified mechanic to confirm the PCM is the root cause before ordering.
How do I confirm this is the right part number for my vehicle?
The best way is to check the service number on your current PCM’s sticker. This unit replaces service number 12586242 and many others listed in the description. If your number matches, you’ve found the right part.