{"product_id":"electric-fan-dual-speed-control-wiring-harness-for-99-07-chevy-silverado-sierra","title":"Electric Fan Dual Speed Control Wiring Harness For 99-07 Chevy Silverado Sierra","description":"\u003ch2\u003eElectric Fan Dual Speed Control Wiring Harness for Chevy Silverado and GMC Sierra\u003c\/h2\u003e\u003cp\u003eThis electric fan dual speed control wiring harness enables low\/high speed operation of aftermarket or OEM electric fans on 99-07 Chevy Silverado and GMC Sierra pickups and SUVs.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThe electric fan dual speed control wiring harness provides a plug-and-play solution to power and switch dual-speed electric cooling fans on 1999-2007 Chevy Silverado and GMC Sierra trucks. It uses dual relays to manage low and high fan speeds, improving cooling control for towing, performance, or air-conditioning loads. This electric fan dual speed control wiring harness eliminates the need to splice together a custom harness, saving installation time while delivering reliable fan staging.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003ePre-wired dual-relay architecture switches between low and high speed without manual intervention\u003c\/li\u003e\n\u003cli\u003eWeather-sealed connectors resist moisture and road-grime corrosion\u003c\/li\u003e\n\u003cli\u003eOvercurrent protection matched to typical dual-fan current draws\u003c\/li\u003e\n\u003cli\u003eOEM-style wire colors and terminal layouts simplify integration with factory trigger circuits\u003c\/li\u003e\n\u003cli\u003eHeat-resistant wire insulation rated for underhood temperatures\u003c\/li\u003e\n\u003cli\u003eStrain-relieved loom prevents chafing when routed around radiator supports\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003efor Chevy Silverado (1999-2007)\u003c\/li\u003e\n\u003cli\u003efor GMC Sierra (1999-2007)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eConverting a belt-driven fan to electric dual-fan setup for improved throttle response\u003c\/li\u003e\n\u003cli\u003eAdding dual-speed control during heavy towing to keep coolant temperatures stable\u003c\/li\u003e\n\u003cli\u003eUpgrading single-speed fan circuits to staged cooling in stop-and-go traffic\u003c\/li\u003e\n\u003cli\u003eSupporting high-amp fans on lifted or modified trucks with increased cooling demands\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eSpecs At A Glance\u003c\/h4\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFunction\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDual speed (low\/high) fan control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eApplication\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1999-2007 Chevy Silverado and GMC Sierra\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch4\u003eGood To Know\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Will this harness work with a single-speed fan? \u003cstrong\u003eA:\u003c\/strong\u003e No, it is engineered specifically for dual-speed electric fans; using it with a single-speed fan may cause incorrect staging or fan failure.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Do I need an external fan controller? \u003cstrong\u003eA:\u003c\/strong\u003e The harness includes relays and trigger wiring designed to accept signals from the vehicle ECM or a dash switch, but you must verify your fan amperage does not exceed the relay ratings.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eSlight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.\u003c\/em\u003e\u003c\/p\u003e","brand":"Solid Spare","offers":[{"title":"Default Title","offer_id":44965151113302,"sku":"ZZ3A00377","price":68.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/57_dca39b38-2061-4318-9c69-444d154a42e2.jpg?v=1781654476","url":"https:\/\/www.solidspare.com\/products\/electric-fan-dual-speed-control-wiring-harness-for-99-07-chevy-silverado-sierra","provider":"Solid Spare","version":"1.0","type":"link"}