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