Important Information – Used ECMs

• Tested & Verified: Good, tested used electrical components.

• Programming Required: Must be flashed to your vehicle’s specific VIN by a dealer or qualified shop before installation.

• Programming Not Included: Buyer is responsible for all programming.

• Return Policy: Electrical components that have been opened, installed, or plugged in are generally non-returnable unless covered under warranty.

12582605 Used GM/Chevrolet 6.0L V8 Engine Control Module (ECM)

This used GM/Chevrolet 12582605 Engine Control Module (ECM) is an OEM replacement engine computer associated with select General Motors vehicles equipped with the 6.0L V8 gasoline engine.

The ECM, also commonly referred to as a Powertrain Control Module (PCM), processes information from engine sensors and manages critical engine operating functions, including fuel injection, ignition timing, engine performance, diagnostic monitoring, and applicable emissions-related controls.

GM 6.0L gasoline engines have been widely used in Chevrolet and GMC trucks, vans, cutaway chassis, and commercial fleet vehicles. These platforms are especially relevant to shuttle buses, passenger transportation vehicles, and Type A school buses built on compatible GM chassis.

A used OEM engine control module provides a cost-effective alternative to purchasing a new or remanufactured engine computer, helping fleet operators and repair facilities reduce repair expenses while extending the service life of existing vehicles.

The replacement ECM must be programmed with the correct vehicle-specific VIN and engine calibration before installation. Programming should be completed by a qualified repair facility equipped with appropriate GM diagnostic and programming equipment.

Important Compatibility Note: GM used multiple ECM hardware configurations across its 6.0L V8 engine family. Matching the engine displacement alone does not guarantee compatibility. Verify the original ECM number, vehicle VIN, engine RPO code, connector configuration, and required calibration before purchasing.

Part Specifications

Primary OEM Part Number: 12582605
Manufacturer: General Motors / Chevrolet
Component Type: Engine Control Module (ECM) / Powertrain Control Module (PCM)
Condition: Used
Engine Application: GM 6.0L V8 Gasoline
Fuel Type: Gasoline
Stock Number: 10E-12582605-STK
Programming Required: Yes – Vehicle-Specific
Programming Included: No
Typical Vehicle Platforms: Chevrolet/GMC Trucks, Vans, and Commercial Chassis
Compatibility: Verify OEM Number, VIN, Engine RPO Code, and ECM Hardware

Common Applications

Potential applications include select GM vehicles equipped with compatible 6.0L V8 gasoline engines:

• Chevrolet Silverado and GMC Sierra trucks

• Chevrolet Express and GMC Savana vans

• Chevrolet/GMC cutaway chassis

• Type A school buses built on compatible GM chassis

• Shuttle buses and commercial passenger vehicles

These are general GM 6.0L vehicle platforms rather than confirmed direct fitments for 12582605. Verify the original ECM and vehicle VIN before purchasing.

OEM # 12582605, 12589463, 12602802, 89017734, 28042802, 12580786