Get Your GM Truck or SUV Back on the Road
Is your 2004 Cadillac Escalade ESV, Sierra, or Silverado plagued by frustrating issues like a persistent check engine light, poor fuel mileage, erratic transmission shifting, or even a no-start condition? These are classic signs of a failing Powertrain Control Module (PCM), the electronic brain of your vehicle. Don’t let a faulty computer keep your reliable truck or SUV sidelined. This is the direct, professional solution you need to restore your vehicle’s performance and dependability.
Common Symptoms & Your Solution
A failing ECM can cause a wide range of problems that can be difficult to diagnose. If you’re experiencing any of the following, this pre-programmed engine computer is your definitive fix:
- Check Engine Light (CEL) with codes like P0601, P0602, P0606, or other communication faults.
- Vehicle won’t start or has difficulty starting.
- Noticeable decrease in fuel economy.
- Harsh or unpredictable automatic transmission shifting.
- Stalling, sputtering, or poor engine performance.
- Failure to pass an emissions test.
By ordering this programmed 2004 Escalade ESV ECM, you are getting a fully prepared component that eliminates the guesswork and the need for expensive dealership programming tools.
Features & Benefits
- ✔ VIN-Specific Programming: We flash this computer with your vehicle’s unique VIN and the latest factory software updates from GM. This ensures perfect compatibility and function right out of the box.
- ✔ True Plug-and-Play Installation: Because the module arrives pre-programmed, you can avoid a costly trip to the dealership. Simply install the unit, and you’re ready to go. (A security relearn procedure may be required on some models, which is a simple key-cycle process.)
- ✔ Restored Performance & Efficiency: With the latest software and correct calibration for your vehicle, you can expect to regain lost power, smooth shifting, and optimal fuel economy.
- ✔ Guaranteed Compatibility: This computer is the correct replacement for service numbers 12586242, 19299226, 89017738 and many others. Please check the provided fitment list to confirm for your vehicle.
- ✔ This unit is backed by our one-year replacement warranty.
An Expert Mechanic’s Tip:
Many people are tempted to grab a used computer from a salvage yard to save a few dollars. However, this is almost always a mistake. Modern GM vehicles use a sophisticated anti-theft system (VATS/Passlock) that marries the ECM to the original vehicle. A junkyard part will not allow your engine to start without being professionally reprogrammed. Our service handles all of that for you, providing a properly configured programmed 2004 Escalade ESV ECM that communicates correctly with your vehicle’s other modules from the moment you install it.
Frequently Asked Questions
What information do I need to provide?
After you complete your purchase, you must provide us with your vehicle’s 17-digit Vehicle Identification Number (VIN). We cannot program and ship your part without it. The VIN ensures we load the exact correct software for your vehicle’s specific options.
Is this really a plug-and-play part?
Yes. Because we program the computer to your VIN before shipping, it arrives ready to be installed without the need for a dealer’s scan tool. On some GM vehicles, you may need to perform a simple security relearn procedure, which typically involves cycling the ignition key and takes about 10-15 minutes. Instructions are readily available online for this process.
How do I know if my old ECM is the problem?
While this part resolves the most common electronic powertrain issues, we always recommend a proper diagnosis by a qualified mechanic. Check for good power and ground signals to your existing computer and rule out sensor or wiring issues before ordering a replacement.
Where do I find my original service number?
Your vehicle’s original service number is printed on a sticker on the case of your current engine computer. Matching this number with our list (e.g., 12586242, YFXP, YFKD) is the best way to confirm you are ordering the correct hardware.
What kind of warranty is included?
This unit is backed by our one-year replacement warranty, giving you confidence in your repair.
Will this fit vehicles other than the Escalade?
Absolutely. This specific programmed 2004 Escalade ESV ECM hardware is also used on a wide variety of 2004 GM trucks and SUVs, including the Silverado, Sierra, Tahoe, Yukon, Hummer H2, and more. Please refer to the detailed fitment list on this page to confirm compatibility.