Programmed 2003 Silverado 3500 PCM 12581565 | VIN Matched Engine Computer

End Your Truck’s Engine Problems

Get a reliable, direct-fit replacement for your failing engine computer. This Powertrain Control Module for 2003 GM trucks and vans comes pre-programmed to your vehicle’s VIN, saving you a costly trip to the dealer. It’s the perfect solution for fixing no-start conditions, erratic shifting, and persistent check engine lights caused by a bad PCM. Order today to restore your vehicle’s performance!

$98.95

+11.99 USPS Priority Shipping

Availability: In stock



SKU: 590-06724-115 Categories: ,
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Restore Peak Performance to Your GM Truck or Van

Is your 2003 Silverado 3500 or other GM vehicle suffering from baffling electrical gremlins? Issues like stalling for no reason, harsh or failed shifting, a persistent check engine light, or a complete no-start condition can often be traced back to a single component: a failing Powertrain Control Module (PCM). As the brain of your vehicle’s engine and transmission, when the PCM goes, it takes your truck’s reliability with it. This isn’t just an inconvenience; it’s a critical failure that can leave you stranded. This replacement 2003 Silverado 3500 PCM is the definitive solution to get your vehicle running right again.

A Technician’s Notebook: The Intermittent No-Start Nightmare

I remember a 2003 Sierra 2500 with the 8.1L that came into my bay on a tow truck. The owner was frustrated because it would randomly refuse to start. Sometimes it was fine for weeks, then dead in a parking lot. We checked the battery, starter, and fuel pump—all tested good. The scanner showed intermittent communication loss with the PCM (U-codes). After ruling out wiring issues, we focused on the PCM itself. On these trucks, it’s located under the battery tray, where it’s exposed to potential acid leaks and intense heat cycles. A new, properly programmed module fixed it instantly. That’s why for a 2003 Silverado 3500 PCM, ensuring you have a quality, correctly flashed unit is non-negotiable.

Is Your Vehicle Showing These Signs of PCM Failure?

  • ✔ Engine stalling or misfiring randomly
  • ✔ Complete no-start condition where the engine cranks but won’t fire
  • ✔ Drastic decrease in fuel economy
  • ✔ Transmission shifting erratically, harshly, or not at all
  • ✔ Check Engine Light is on with codes like P0601 (Internal Control Module Memory Check Sum Error), P0602, P0606, or other communication errors.
  • ✔ Inaccurate or non-functional dashboard gauges

Why Our VIN-Programmed PCM is the Smart Choice

Don’t settle for a generic module that requires an expensive trip to the dealership for programming. We take care of the hard part for you. When you purchase this module, you provide us with your vehicle’s 17-digit VIN. Our technicians will then program the PCM with the latest GM-certified software specific to your exact vehicle configuration. This ensures all systems—from the anti-theft system (VATS) to the transmission shift points and engine parameters—function exactly as the factory intended. It’s a precise, reliable fix that saves you time, money, and headaches.

Your Straightforward Installation Guide

  1. ✔ Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post.
  2. ✔ Locate the PCM: On most compatible trucks and SUVs (like the Silverado, Sierra, Suburban), the PCM is located in the engine bay on the driver’s side, underneath the battery tray. You will need to remove the battery to access it. On Express/Savana vans, it’s typically on the LH rear side of the engine compartment.
  3. ✔ Disconnect the Old Module: Carefully unplug the electrical connectors. There are typically release tabs that need to be pressed or lifted. Inspect the connectors for any corrosion or damage and clean if necessary.
  4. ✔ Swap the Modules: Unbolt the old PCM from its bracket and install your new, pre-programmed module in its place.
  5. ✔ Reconnect Everything: Securely plug the electrical connectors into the new PCM until they click. Reinstall the battery and its tray, then reconnect the negative battery terminal.
  6. ✔ Perform Security Relearn: You will need to perform a simple security relearn procedure to sync the new PCM with your vehicle’s anti-theft system. This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then ‘OFF’ for 10 seconds, and repeating this cycle three times. Your vehicle should then start and run normally.

Verified Compatibility for Your GM Vehicle

This module, service part number 12581565, is a direct-fit replacement for a wide range of GM vehicles. It is compatible with a host of other service numbers including 8125815650, 12570557, 12576106, 12578127, 89017733, and more. Please verify fitment for your specific model below:

  • Chevrolet Avalanche 2500 (2003)
  • Chevrolet Astro / GMC Safari (2003)
  • Chevrolet Blazer / GMC Jimmy S15 (2003)
  • Chevrolet Express / GMC Savana Vans (1500, 2500, 3500) (2003)
  • Chevrolet S10 / GMC Sonoma (2003 w/ 4.3L)
  • Chevrolet Silverado / GMC Sierra Pickup (1500 w/ 4.3L, 2500/3500 w/ 8.1L Gas) (2003)
  • Chevrolet Suburban 2500 / GMC Yukon XL 2500 (2003 w/ 8.1L)
  • Cadillac CTS (2004, Base, ID 12581565)
  • Chevrolet Corvette (2004, ID 12581565)

Restore the core of your vehicle’s command system with a reliable, ready-to-install 2003 Silverado 3500 PCM. Eliminate the guesswork and get back on the road with confidence.

Frequently Asked Questions

What is a PCM and what does it do?

The Powertrain Control Module (PCM) is your vehicle’s main computer. It controls all aspects of engine and transmission function, including fuel mixture, ignition timing, and transmission shifting, to ensure optimal performance, fuel economy, and emissions.

Do I need to do anything after I install this part?

Yes. While the module comes programmed to your VIN, you must perform a standard GM security relearn procedure after installation. This is a simple process that syncs the new PCM to your vehicle’s keys and anti-theft system and does not require any special tools.

How do I provide my VIN for programming?

After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). We cannot ship your part until we receive this information, as the programming is essential for the part to work in your vehicle.

Will this fix my specific check engine light codes?

This PCM is a direct solution for internal module failure codes like P0601, P0602, and P0606. If you have other codes, they may be related to failing sensors or other components that the PCM is correctly identifying as faulty. A proper diagnosis is always recommended.

What if my original part number is not 12581565?

This module is compatible with a long list of alternate service numbers, including 12570557, 12576869, and 89017733, among others. Please check the full list in our description to see if your number is included. If you are unsure, contact us with your VIN and we can verify compatibility.

Conditions & Options

Programmed to your VIN GM: 12576106

Year
Genuine OEM

Yes

MPN

12581565

Interchange part number

Condition

Refurbished

Model

Silverado 3500 Pickup

Year

2003

Brand

GM

Manufacturer Part Number

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GTIN

Does not apply

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