---
product_id: 230395276
title: "Flashmasters 2003 GMC Sierra Engine Computer 12582605 \"Programmed to Your VIN ECM PCM ECU"
brand: "flashmasters"
price: "$U15564"
currency: UYU
in_stock: true
url: https://www.desertcart.uy/products/230395276-flashmasters-2003-gmc-sierra-engine-computer-12582605-programmed-to-your
store_origin: UY
region: Uruguay
---

# Instructions Included VIN Programming Plug & Play Flashmasters 2003 GMC Sierra Engine Computer 12582605 "Programmed to Your VIN ECM PCM ECU

**Brand:** flashmasters
**Price:** $U15564
**Availability:** ✅ In Stock

## Summary

> 🚗 Rev Up Your Ride with Precision Performance!

## Quick Answers

- **What is this?** Flashmasters 2003 GMC Sierra Engine Computer 12582605 "Programmed to Your VIN ECM PCM ECU by flashmasters
- **How much does it cost?** $U15564 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.uy](https://www.desertcart.uy/products/230395276-flashmasters-2003-gmc-sierra-engine-computer-12582605-programmed-to-your)

## Best For

- flashmasters enthusiasts

## Why This Product

- Trusted flashmasters brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Durable Design:** Built to withstand the rigors of daily driving, ensuring long-lasting reliability.
- • **User-Friendly Setup:** Includes clear instructions for a hassle-free installation process.
- • **Seamless Integration:** Experience effortless installation with our Plug and Play design.
- • **Tailored Performance:** Each ECM is programmed specifically to your VIN for optimal vehicle performance.
- • **Comprehensive Compatibility:** Fits a wide range of 2003 GMC Sierra models, ensuring versatility.

## Overview

The 2003 GMC Sierra Engine Computer (Part Number: 12582605) is a high-performance ECM designed for seamless integration with your vehicle. Compatible with various GMC Sierra models, this unit is programmed specifically to your VIN, ensuring optimal functionality. With a user-friendly Plug and Play setup and included instructions, upgrading your engine management system has never been easier.

## Description

Flashmasters 2003 GMC Sierra Engine Computer 12582605 "Programmed to Your VIN ECM PCM ECU

## Features

- Manufacturer Part Number: 12582605
- This E.C.M. fits the following vehicles: 2003 4.8/5.3/6.0L GMC Sierra (1500, 1500HD, 2500, 2500HD, 3500).
- After you purchase the E.C.M. you will need to provide us with your V.I.N so that we can program the E.C.M.
- Plug and Play, Instructions Included

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Color | Multicolor |

## Product Details

- **Color:** Multicolor
- **Brand:** Flashmasters
- **Voltage:** 14 Volts
- **Display Type:** LCD or LED
- **Manufacturer:** Flashmasters

## Images

![Flashmasters 2003 GMC Sierra Engine Computer 12582605 "Programmed to Your VIN ECM PCM ECU - Image 1](https://m.media-amazon.com/images/I/71q78aHPNWL.jpg)
![Flashmasters 2003 GMC Sierra Engine Computer 12582605 "Programmed to Your VIN ECM PCM ECU - Image 2](https://m.media-amazon.com/images/I/91skApFXdIL.jpg)
![Flashmasters 2003 GMC Sierra Engine Computer 12582605 "Programmed to Your VIN ECM PCM ECU - Image 3](https://m.media-amazon.com/images/I/71QaLrq-E9L.jpg)
![Flashmasters 2003 GMC Sierra Engine Computer 12582605 "Programmed to Your VIN ECM PCM ECU - Image 4](https://m.media-amazon.com/images/I/91q8XrnMOjL.jpg)
![Flashmasters 2003 GMC Sierra Engine Computer 12582605 "Programmed to Your VIN ECM PCM ECU - Image 5](https://m.media-amazon.com/images/I/710WrLYnARL.jpg)

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**Shop now:** [https://www.desertcart.uy/products/230395276-flashmasters-2003-gmc-sierra-engine-computer-12582605-programmed-to-your](https://www.desertcart.uy/products/230395276-flashmasters-2003-gmc-sierra-engine-computer-12582605-programmed-to-your)

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*Product available on Desertcart Uruguay*
*Store origin: UY*
*Last updated: 2026-02-27*