2004 Escalade ECM Engine Computer PCM 12586242 Programmed

Restore Your Truck’s Brainpower

Get your 2004 GM truck or SUV running right with this direct-fit Engine Control Module. Pre-programmed to your vehicle’s VIN for a simple, plug-and-play installation. Fix check engine lights, stalling, and poor performance. Order now to restore your vehicle’s reliability!

$119.95

+11.99 USPS Priority Shipping

Availability: In stock



Guaranteed Safe Checkout

Restore Your GM Truck’s Performance and Reliability

Is your 2004 Cadillac Escalade, Sierra, Silverado, or another compatible GM vehicle running rough, stalling, or showing a persistent check engine light? These are classic signs of a failing Engine Control Module (ECM). The ECM is the brain of your vehicle, managing everything from fuel injection and ignition timing to transmission shifting. When it fails, it can cause a wide range of frustrating and potentially damaging issues. This replacement ECM, part number 12586242, is the definitive solution to get your truck or SUV back on the road and running like new.

This isn’t just a generic part off the shelf. We provide a fully plug-and-play solution by programming the module specifically to your vehicle’s Vehicle Identification Number (VIN). This critical step ensures that the computer has the correct software and calibrations for your exact engine, transmission, and options package. It also means you receive the latest GM software updates, which can resolve factory bugs and improve overall performance and efficiency. Simply provide your VIN after purchase, and we’ll handle the complex programming before shipping it directly to you.

From the Diagnostic Bay

We had a 2004 Sierra 1500 in the shop that was a real head-scratcher. The owner complained of random stalling at stoplights and a transmission that seemed to shift harshly out of nowhere. There were no consistent trouble codes, just a generic U-code for lost communication that would pop up intermittently. We checked grounds, wiring harnesses, and sensor data for days. Finally, on a hunch, we monitored the ECM’s internal temperature data and noticed it was spiking just before an event. The internal processor was failing under heat load. We installed a VIN-programmed module just like this one, and the truck has been running perfectly ever since. Sometimes, the most complex problems have a straightforward, high-quality solution.

Identifying a Failing 2004 Escalade ECM

A faulty ECM can manifest in numerous ways, often mimicking other sensor or component failures. If you’re experiencing any of the following, your ECM could be the culprit. This module is the correct fix for these common issues.

  • ✔ Check Engine Light: The light is on, and you may have codes related to module communication (U-codes) or multiple, unrelated sensor codes.
  • ✔ Engine Performance Issues: Noticeable loss of power, poor acceleration, rough idling, stumbling, or misfires.
  • ✔ Poor Fuel Economy: A sudden and unexplained drop in your vehicle’s MPG can be caused by incorrect fuel calculations from a failing ECM.
  • ✔ Intermittent Stalling: The engine may shut off unexpectedly while driving or when coming to a stop.
  • ✔ No-Start Condition: The engine cranks but refuses to start, often due to the ECM not firing the ignition coils or fuel injectors.
  • ✔ Harsh or Erratic Shifting: The ECM plays a crucial role in transmission control, and a failure can lead to incorrect shift points and harsh engagement.
  • ✔ Communication Failure: Your diagnostic scan tool may be unable to communicate with the powertrain control module.

Guaranteed Compatibility and Simple Installation

This module is a direct replacement for service number 12586242 and is also compatible with a wide range of other service numbers, including 19299226, 89017738, YFKD, YFKF, YFKH, YFKJ, YFKX, YFXL, YFXM, YFXN, YFXP, and YHTN. It fits an extensive list of 2004 GM vehicles such as the Escalade, Avalanche, Silverado, Sierra, Tahoe, Yukon, Hummer H2, SSR, and more. Because we program it to your VIN, the installation process is simplified. In many cases, after installation, you will only need to perform a security relearn procedure, which can often be done without a scan tool. This saves you a costly trip to the dealership and gets your vehicle operational faster.

Do I need to send my old ECM (core) back?

No core charge or return is required for this part. You can keep your old module, which saves you the time and expense of return shipping.

What information do you need to program the module?

After you complete your purchase, you will need to provide us with your vehicle’s 17-digit VIN. This allows us to load the exact GM-certified software and calibrations for your specific vehicle configuration.

Is any additional programming needed after installation?

Because the module is pre-programmed to your VIN, the main engine and transmission software is ready to go. However, you will need to perform a security relearn procedure (also known as a CASE learn or anti-theft relearn). This syncs the new ECM to your vehicle’s anti-theft system and can typically be done with a simple key-on/key-off sequence. Instructions are readily available online for this procedure.

Where is the ECM located on my 2004 GM truck/SUV?

The location varies slightly by model. On most full-size trucks and SUVs like the Escalade, Silverado, and Tahoe, the ECM is located in the engine bay on the driver’s side, under or next to the battery tray. On models like the Trailblazer, Envoy, and Rainier, it is typically located next to the air filter box.

Will this fix my specific trouble codes?

This ECM will resolve issues and codes that are directly caused by a faulty module. It is essential to properly diagnose your vehicle to ensure the ECM is the root cause. If your codes are for specific sensors (like an O2 sensor or MAP sensor), you should inspect those components and their wiring first. This module will fix codes related to internal processor failure, memory errors, and communication faults.

Condition

Refurbished

Year

Genuine OEM

Yes

MPN

12586242

Interchange part number

Model

ESCALADE

Year

2004

Brand

GM

Manufacturer Part Number

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superseded part number

12586242 19299226 89017738 YFKD, YFKF YFKH YFKJ YFKX YFXL, YFXM YFXN YFXP YHTN

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