Restore Your GM Truck or SUV’s Performance and Reliability
Is your 2004 Cadillac Escalade, Sierra, or Tahoe suffering from frustrating issues like a persistent check engine light, rough idling, poor fuel economy, or even a no-start condition? These are classic signs of a failing Engine Control Module (ECM). Don’t let a faulty computer keep you off the road. This replacement ECM is the definitive, hassle-free solution to restore your vehicle’s original performance and get you driving with confidence again.
Common Symptoms of a Failing ECM & Your Direct Solution
A vehicle’s ECM is its brain, controlling everything from fuel mixture and ignition timing to transmission shifting. When it fails, the symptoms can be unpredictable and confusing. If you’re experiencing any of the following, this part is your solution:
- Unexplained Check Engine Light (CEL) activation
- Engine misfires, stumbling, or hesitation
- Drastic decrease in fuel efficiency
- Intermittent starting problems or complete no-start situations
- Automatic transmission shifting erratically or harshly
- Failure to pass emissions testing
This module is a direct replacement for service number 12586242 and a wide range of other compatible part numbers. By installing this professionally programmed 2004 Escalade EXT ECM, you are directly addressing the root cause of these electronic issues and providing a stable, reliable foundation for your vehicle’s engine management system.
An Expert’s Note on Programming
As a technician with over two decades of experience, I’ve seen countless drivers waste time and money on used modules from a junkyard. The problem? They aren’t programmed for the specific VIN and options of their vehicle, leading to immediate failure or new, even more confusing problems. Our process eliminates that risk entirely. We flash this module with the latest GM-certified software updates using your vehicle’s VIN. This ensures all systems communicate correctly from the moment you plug it in, just like a new part from the factory, but without the dealership price tag.
Features & Benefits You Can Count On
- ✔ Plug & Play Installation: This unit arrives fully programmed to your vehicle’s specific VIN. No extra trips to the dealer for expensive programming are required.
- ✔ Latest GM Software: We flash the module with the newest updates available from GM, ensuring optimal performance, fuel efficiency, and emissions control.
- ✔ Guaranteed Compatibility: This ECM is a direct replacement for service numbers 12586242, 19299226, 89017738, and many more, ensuring a perfect fit for your application.
- ✔ Solves Drivability Issues: Puts an end to common electronic headaches like misfires, poor idling, and harsh shifting caused by a failing computer.
- ✔ Cost-Effective Solution: Get dealership-level quality and programming without the exorbitant dealership costs.
- ✔ This unit is backed by our one-year replacement warranty.
Getting your truck or SUV back to peak condition is simple. After purchase, just provide us with your VIN, and we’ll handle the complex programming. We’ll ship you a ready-to-install 2004 Escalade EXT ECM that will have you back on the road in no time.
Frequently Asked Questions
What do I need to do after I install the ECM?
In most cases, no further action is needed. Because the unit is pre-programmed to your VIN, it is designed for a plug-and-play installation. However, some vehicles may require a security relearn procedure, which is a simple process that can be done without special tools. Instructions are readily available online for your specific model.
How do I provide my VIN number?
After you complete your purchase, you can send us a message through the platform with your vehicle’s 17-digit VIN. You can find your VIN on your vehicle’s registration, insurance card, or on the driver’s side dashboard viewable through the windshield.
Is this the correct part for my vehicle?
This ECM fits a wide variety of 2004 GM trucks and SUVs. Please check the detailed fitment list in the description and match your original part’s service number (e.g., 12586242, YFKD, YFXL) to ensure compatibility. If you are unsure, please contact us with your VIN before ordering.
What if my original part number isn’t on the list?
The provided list covers the most common compatible service numbers. However, GM often uses many different numbers for the same part. If your number is not listed, please send us a message with your VIN and original part number, and we will verify compatibility for you.
Why is a VIN-programmed module better than a used one?
A used module from a junkyard is programmed for a different vehicle’s options, security system, and mileage. This will cause compatibility issues, error codes, or a no-start condition. Our module is programmed specifically for YOUR vehicle, ensuring it works correctly right out of the box.