Dual Electric Fan Upgrade Wiring Harness Kit for GM 1999-2006 ECU Control Engine Cooling Fan Relay Kit

Model	Year Range	Engine
Cadillac Escalade	2002-2006	All Gas Engines
Cadillac Escalade ESV	2003-2006	All Gas Engines
Cadillac Escalade EXT	2002-2006	All Gas Engines
Chevrolet Avalanche 1500	2002-2006	All Gas Engines
Chevrolet Avalanche 2500	2002-2006	All Gas Engines
Chevrolet Silverado 1500	1999-2007 Classic	All Gas Engines
Chevrolet Silverado 2500	1999-2007 Classic	All Gas Engines
Chevrolet Silverado 3500	2001-2007 Classic	All Gas Engines
Chevrolet Suburban 1500	2000-2006	All Gas Engines
Chevrolet Suburban 2500	2000-2006	All Gas Engines
Chevrolet Tahoe	2000-2006	All Gas Engines
GMC Sierra 1500	1999-2007 Classic	All Gas Engines
GMC Sierra 2500	1999-2007 Classic	All Gas Engines
GMC Sierra 3500	2001-2007 Classic	All Gas Engines
GMC Sierra Denali	2002-2007 Classic	All Gas Engines
GMC Yukon	2001-2006	All Gas Engines
GMC Yukon XL 1500	2000-2006	All Gas Engines
GMC Yukon XL 2500	2000-2006	All Gas Engines Only

Product Overview

This brand new dual electric fan wiring harness, also known as an engine cooling fan wire or dual fan relay kit, is built to meet or exceed OEM fit and performance standards for listed GM vehicles. It features a three-relay design that supports both low and high speed fan operation for optimal engine cooling efficiency.

Common Faults & Replacement Symptoms

• Cooling fans fail to activate or only operate on one speed, leading to frequent engine overheating
• Intermittent fan operation caused by corroded or damaged factory wiring harness connections
• Check engine light triggered by cooling fan circuit fault codes related to wiring damage
• Mechanical fan failure leading to repeated overheating events and reduced engine performance
• Blown fuses or melted wiring connectors in the factory cooling fan circuit

Ideal For

• DIY automotive enthusiasts upgrading from a mechanical cooling fan to electric fans on 1999-2007 GM gas vehicles
• Professional repair technicians replacing damaged factory cooling fan wiring harnesses
• Vehicle owners looking to improve engine cooling efficiency and reduce parasitic power loss
• Classic GM truck and SUV owners performing cooling system overhauls or performance upgrades