2003 Silverado PCM 12576106 Programmed Engine Computer

Restore Your Silverado’s Performance!

Get your truck running right again with this pre-programmed engine computer. We flash it with your VIN and the latest GM software for a perfect match, solving issues like stalling, no-starts, and poor fuel economy. Order today for a straightforward fix!

$134.95

+11.99 USPS Priority Shipping

Availability: In stock



SKU: 590-06724-54 Categories: ,
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Is Your 2003 Silverado Running Rough? The PCM Might Be the Culprit.

If you’re dealing with frustrating and unpredictable issues like stalling, poor fuel economy, a persistent check engine light, or a no-start condition in your 2003 Chevrolet Silverado 1500, the problem may lie deep within its electronic nervous system: the Powertrain Control Module (PCM). This component is the brain of your truck’s engine, managing everything from fuel injection and ignition timing to transmission shifting and emissions control. When it fails, it can cause a cascade of problems that are often difficult to diagnose.

This isn’t just a replacement part; it’s a direct solution. We offer a Powertrain Control Module, part number 12576106, that is professionally programmed to your truck’s specific Vehicle Identification Number (VIN). This critical step ensures that the module communicates flawlessly with all other systems in your vehicle, just as the original did. We load the latest, most stable software updates from GM, which can often resolve issues that were present even in the original factory programming. Getting your truck back to peak operational condition is our priority.

From the Diagnostic Bay

We had a 2003 Sierra 2500 with the 8.1L V8 come in on a tow truck. The owner was at his wit’s end. The truck would start and idle fine, but as soon as he put it in gear, it would die. Other times, it would run for 10 minutes and then stall at a stoplight. He had already replaced the fuel pump and crankshaft position sensor based on some generic advice. We hooked up our scanner and saw some very strange data readings and communication errors between the engine and transmission modules. Instead of throwing more parts at it, we inspected the PCM. After confirming the power and grounds were good, we connected a known-good test unit. The truck immediately ran perfectly. The original PCM had an internal fault that only showed up under load. This is a classic failure mode, and a properly programmed replacement like this one was the exact fix he needed.

Symptoms of a Failing Powertrain Control Module

A failing PCM can manifest in numerous ways, often mimicking other component failures. If your truck is experiencing any of the following, it’s time to consider the PCM as a potential cause:

  • ✔ Check Engine Light: The light is on, and you may have codes related to module communication, sensor circuits, or general performance issues.
  • ✔ Engine Stalling or Misfiring: The engine may stall for no apparent reason, either while driving or at idle. You might also experience rough idling or misfires.
  • ✔ No-Start Condition: The engine cranks but refuses to start. This can be caused by the PCM failing to command the fuel pump or ignition coils.
  • ✔ Poor Fuel Economy: If the PCM is not managing the engine’s fuel and air mixture correctly, you’ll see a noticeable drop in MPG.
  • ✔ Failed Emissions Test: An improperly functioning PCM can lead to an automatic failure at the emissions station.
  • ✔ Harsh or Erratic Shifting: The PCM also controls transmission functions, and a fault can lead to hard shifts, delayed engagement, or being stuck in one gear (limp mode).

The Importance of a VIN-Programmed 2003 Silverado PCM

You can’t simply take a PCM from another truck and expect it to work. Modern vehicles use a complex anti-theft system (Passlock/VATS) and have specific calibrations for the engine, transmission, and even tire size. Our programming service handles all of this for you. By providing us with your VIN, you receive a 2003 Silverado PCM that is a direct-fit, plug-and-play solution. We ensure the software matches your vehicle’s exact configuration, eliminating the need for an expensive trip to the dealership for programming.

This module is a direct replacement for multiple service numbers, including 12581565, 12570557, 12576106, 89017733, and more. It also fits a wide range of other 2003 GM vehicles, such as the GMC Sierra, Chevrolet Express, GMC Savana, Suburban 2500, and Avalanche 2500. Please verify the part number and application list to ensure compatibility.

Frequently Asked Questions

Why do I need to provide my VIN?

Your vehicle’s VIN (Vehicle Identification Number) is essential for programming the PCM. It contains specific information about your truck’s engine, transmission, emissions systems, and factory options. We use the VIN to load the exact GM-certified software your vehicle requires for proper function and to ensure it communicates correctly with the anti-theft system.

Is this part difficult to install?

The physical installation is generally straightforward for someone with basic mechanical skills. The PCM is typically located in the engine bay, under the battery tray on the driver’s side. After disconnecting the battery, you simply unplug the electrical connectors and unbolt the module. Once the new one is installed, you reconnect the battery. Because we pre-program it, no further software flashing is required.

Will I need to perform any other procedures after installation?

In some cases, a security relearn procedure or a Crankshaft Variation (CASE) relearn may be necessary. These are simple procedures that can often be done without special tools. We can provide instructions for these if they are required for your specific vehicle.

What if this doesn’t fix my problem?

While this PCM is a direct solution for a faulty module, it’s important to ensure your vehicle has been properly diagnosed. A faulty PCM can mimic other issues like bad sensors or wiring problems. We recommend confirming the diagnosis or having a professional mechanic inspect the vehicle if you are unsure.

Is this a new or used part?

This is a high-quality, inspected, and tested recycled OEM part. Each unit is verified for full functionality before being programmed with the latest GM software for your specific VIN, ensuring reliable performance.

Conditions & Options

Programmed to your VIN GM: 12576106

Year
Genuine OEM

Yes

MPN

12576106

Interchange part number

Condition

Refurbished

Model

Silverado 1500 Pickup

Year

2003

Brand

GM

Manufacturer Part Number

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GTIN

Does not apply

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