Restore Peak Performance to Your 2004 GM Truck or SUV
Is your 2004 Escalade ESV, Sierra, or Tahoe suffering from frustrating and unpredictable engine issues? A faulty Powertrain Control Module (PCM) can disrupt everything from fuel economy to transmission shifting, leaving you stranded and stressed. This replacement PCM, part number 12586242, is the definitive solution to get your vehicle running like new again. We take the guesswork out of the repair by professionally programming the unit to your vehicle’s specific VIN before it ships, ensuring a seamless installation and immediate results.
Common Symptoms & Your Solution
If you’re experiencing any of the following, a failing PCM is the likely culprit:
- Erratic or harsh transmission shifting
- Poor fuel mileage and engine performance
- Engine stalling, stuttering, or failing to start
- Illuminated Check Engine Light with codes like P0601, P0602, or P0606
- Communication errors with diagnostic scan tools
This pre-programmed engine computer is engineered to resolve these issues, restoring your vehicle’s original power, efficiency, and dependability. It’s the most reliable and straightforward way to get back on the road with confidence.
Features & Benefits
- ✔ Plug-and-Play Installation: Arrives programmed to your specific VIN. In most cases, this eliminates the need for expensive dealership programming.
- ✔ Latest GM Software Updates: We flash each module with the newest vehicle-specific software from GM, ensuring optimal performance and longevity.
- ✔ Guaranteed Compatibility: This unit is a direct replacement for service numbers 12586242, 19299226, 89017738, YFKD, YFKF, YFKH, YFKJ, YFKX, YFXL, YFXM, YFXN, YFXP, and YHTN.
- ✔ Restored Drivability: Corrects common PCM failure symptoms, bringing back the smooth and responsive driving experience you expect from your vehicle.
- ✔ Peace of Mind Protection: This unit is backed by our one-year replacement warranty.
An Expert’s Note on Diagnostics
As a technician with over two decades of experience, I’ve seen countless hours and dollars wasted on replacing perfectly good sensors and components when the PCM was the root cause. A failing computer can send false signals, making it seem like you have a bad throttle body or a faulty transmission solenoid. By starting with the ‘brain’ of the operation—this programmed 2004 Escalade ESV PCM 12586242—you are addressing the core of the system and preventing costly misdiagnoses. It’s the smart repair that saves you time and frustration.
Frequently Asked Questions
How do I provide my VIN number?
After you complete your purchase, you will receive instructions to send us your vehicle’s 17-digit VIN. We cannot program and ship your PCM without this information.
Will I need to do a security relearn procedure?
Yes, in most cases, you will need to perform a simple security relearn (often called a CASE relearn or Passlock relearn) after installation. This procedure is straightforward, requires no special tools, and typically takes 10-30 minutes. We can provide instructions for this process.
Is this a difficult part to install?
Installation is generally simple for someone with basic mechanical skills. The PCM is typically located in the engine bay (on the driver’s side, under the battery or next to the airbox). It involves disconnecting the battery, unplugging the electrical connectors, and unbolting the old unit. Our programming service handles the most complex part of the job for you.
How can I be sure this fits my vehicle?
This PCM fits a wide range of 2004 GM models. Please check the detailed fitment list on this page and ensure your original unit has one of the listed service numbers (e.g., 12586242, YFKJ). Providing your VIN ensures we program the correct software for your exact vehicle configuration.
What if my original part number isn’t on the list?
If your part number is not listed, please contact us with your vehicle’s year, make, model, and VIN. We will be happy to help you find the correct computer for your vehicle.