Restore Peak Performance to Your GM Truck or SUV
Is your 2004 Chevrolet Suburban 2500 suffering from erratic behavior, a persistent check engine light, or frustrating no-start conditions? The Powertrain Control Module (PCM), often called the Engine Control Module (ECM), is the central computer responsible for managing your engine’s performance, fuel economy, and emissions. When it fails, it can cause a cascade of problems that are often difficult to diagnose. This replacement ECM, service number 12586242, is the definitive solution to get your vehicle running reliably again.
This isn’t just a generic part off the shelf. We provide a comprehensive service that includes programming this 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 Suburban’s specific engine, transmission, and options. By flashing the unit with the latest GM updates, we ensure optimal performance and compatibility, making the installation process as seamless as possible.
From the Diagnostic Bay
We had a 2004 Sierra 2500HD with the 6.0L come in, towed to the shop because it would crank but not start. The owner had already replaced the fuel pump and crank sensor with no luck. Our initial scan showed no communication with the PCM. After checking powers and grounds to the module, we confirmed the PCM itself was the culprit. A generic replacement wouldn’t work due to the vehicle’s anti-theft system (Passlock). By providing a VIN-programmed module like this one, the customer was able to install it, perform a simple security relearn procedure, and have his truck fire right up, saving him hundreds in diagnostic time and towing fees.
Symptoms of a Failing 2004 Suburban 2500 ECM
A faulty engine computer can manifest in numerous ways. If you’re experiencing any of the following issues, a failing ECM could be the root cause:
- ✔ Persistent Check Engine Light (CEL) with various trouble codes
- ✔ Engine stalling, stumbling, or misfiring
- ✔ Harsh or erratic automatic transmission shifting
- ✔ A significant drop in fuel economy
- ✔ The engine cranks but refuses to start
- ✔ No communication with the OBD-II port using a scan tool
- ✔ Intermittent electrical or sensor-related issues
Direct-Fit, Hassle-Free Installation
This module is a direct replacement for service numbers 12586242, 19299226, 89017738, and many others. It is physically identical to the original unit, ensuring a perfect fit. On your 2004 Suburban 2500, the ECM is typically located on the driver’s side of the engine bay, under the battery tray. Once you provide us with your VIN upon purchase, we handle all the necessary programming. This means when you receive the part, it is ready for installation. In most cases, a simple security relearn procedure (which can be done without special tools) is all that’s needed to get you back on the road.
Guaranteed Compatibility
This ECM is compatible with a wide range of 2004 GM vehicles, including the Chevrolet Suburban, Silverado, Tahoe, Avalanche, SSR, Trailblazer EXT; GMC Sierra, Yukon; Cadillac Escalade; Hummer H2; Buick Rainier; and Isuzu Ascender. Please verify your original part number or one of the compatible service IDs (YFKD, YFKF, YFKH, etc.) listed in the fitment data to ensure a perfect match for your vehicle.
Frequently Asked Questions
Do I need to have this computer programmed?
No. We handle all the programming for you before shipment. Simply provide your vehicle’s VIN during or after checkout, and we will flash the module with the correct GM software for your specific vehicle.
Where is the ECM located on my 2004 Suburban 2500?
On most GM trucks and full-size SUVs from this year, including the Suburban 2500, the ECM is located in the engine bay on the driver’s side, underneath the battery and battery tray.
Is any additional setup required after installation?
After installing the programmed module, you will likely need to perform a security relearn procedure. This procedure syncs the new ECM with your vehicle’s anti-theft system and can typically be done in your driveway in about 30 minutes without any special tools. Instructions are readily available online for the GM Passlock system.
Will this part fix my specific problem?
This module will correct issues directly caused by a faulty ECM. While the symptoms listed are common indicators of ECM failure, it’s essential to have your vehicle properly diagnosed. Ensure that other potential causes, such as wiring or sensor faults, have been ruled out.
What information do you need from me?
We require your 17-digit Vehicle Identification Number (VIN) to program the module correctly. You can find your VIN on your vehicle’s dashboard (visible through the windshield), on the driver’s side door jamb sticker, or on your vehicle’s registration and insurance documents.