{"product_id":"gledewen-electric-fan-wiring-harness-for-1999-2007-chevy-gmc-cadillac-dual-speed-relay-34-inch-radiator-fit","title":"Gledewen Electric Fan Wiring Harness for 1999–2007 Chevy\/GMC\/Cadillac — Dual-Speed Relay, 34-inch Radiator Fit","description":"\u003cstrong\u003eGledewen's Electric Fan Wiring Harness is a direct-fit dual-speed relay kit designed to replace factory fan wiring on compatible 1999–2007 Chevy, GMC and 2002–2006 Cadillac models, restoring reliable electric fan control.\u003c\/strong\u003e\n\n\u003cp\u003eIf your vehicle's electric fan wiring has become brittle, corroded, or has failed after years of service, this dual-speed harness from Gledewen is built to match OEM fitment and restore proper cooling fan operation for gasoline-engine trucks and SUVs with 34-inch radiators. The harness includes relay and circuit breaker mounting provisions and uses durable wiring and terminals so it can be installed as a plug-and-play replacement or integrated into an aftermarket electric-fan conversion.\u003c\/p\u003e\n\n\u003ch3\u003eWhich vehicles and engines does this harness fit?\u003c\/h3\u003e\n\u003cp\u003eThis harness is intended for gasoline (petrol) engines only and was engineered for specific Chevrolet, GMC and Cadillac pickup and SUV models from model years 1999 through 2007 where listed. It is not compatible with diesel engines.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eChevrolet: Silverado 1500\/2500 (1999–2006), Silverado 3500 (2001–2006), 2007 Classic-style Silverado 1500\/2500\/3500, Avalanche 1500\/2500 (2002–2006), Suburban 1500\/2500 (2000–2006), Tahoe variations (2000–2006).\u003c\/li\u003e\n  \u003cli\u003eGMC: Sierra 1500\/2500 (1999–2006), Sierra 3500 (2001–2006), 2007 Classic-style Sierra, Sierra Denali (2002–2006), Yukon\/Yukon XL and other listed Yukon variants (2000–2006).\u003c\/li\u003e\n  \u003cli\u003eCadillac: Escalade series (2002–2006) including EXT and ESV.\u003c\/li\u003e\n  \u003cli\u003eOEM cross-reference: replaces part numbers 674-00923 and 67400923.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does the Gledewen harness improve reliability over worn original wiring?\u003c\/h3\u003e\n\u003cp\u003eThe harness uses high-quality copper conductors and durable plastic insulation rated to resist heat, oil, abrasion and corrosion — common failure modes for under-hood wiring. Relays and a circuit breaker are supported with mounting points to keep components secure and minimize vibration-related wear.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHeavy-gauge wiring for stable current delivery to dual-speed fans.\u003c\/li\u003e\n  \u003cli\u003eCorrosion-resistant terminals and factory-checked crimps for reliable connections.\u003c\/li\u003e\n  \u003cli\u003eBuilt-in relay mounting and circuit breaker provision for neat, secure installation.\u003c\/li\u003e\n  \u003cli\u003eDesigned for 34-inch radiator fan layouts typical on listed models.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat should I expect during installation and compatibility checks?\u003c\/h3\u003e\n\u003cp\u003eThe harness is manufactured to meet or exceed OEM specifications so it can be installed in place of the original fan wiring assembly. Basic wiring knowledge is recommended and professional installation is advised when possible to ensure correct relay and breaker placement and secure connections.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDirect-fit for listed models; confirm vehicle year and engine type (petrol only).\u003c\/li\u003e\n  \u003cli\u003eInspect fan size (34-inch radiator fan requirement) and OE connector match before installation.\u003c\/li\u003e\n  \u003cli\u003eAll wires and terminals factory-checked; relays and breaker not necessarily pre-mounted.\u003c\/li\u003e\n  \u003cli\u003eReplacement part numbers: 674-00923, 67400923 for reference during purchase.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat warranty and post-purchase support does Gledewen offer?\u003c\/h3\u003e\n\u003cp\u003eThis harness includes a 24-month warranty for replacement or refund through customer support channels. If you encounter fitment or performance issues, contact the seller so they can assist with a replacement or troubleshooting guidance.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e24-month replacement or refund policy available via seller contact.\u003c\/li\u003e\n  \u003cli\u003eFactory-tested wiring and terminals to reduce initial defects.\u003c\/li\u003e\n  \u003cli\u003eSupport recommended for installation questions or fitment verification.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The Gledewen Electric Fan Wiring Harness is aimed at owners and mechanics working on compatible late‑1990s and 2000s Chevrolet, GMC and Cadillac trucks and SUVs with gasoline engines who need a robust, OEM‑style replacement for aging or damaged electric fan wiring. It suits vehicle restorations, cooling system repairs, or upgrades to standalone electric fan setups where a clean, secure relay and breaker mount is desired. If you prefer a plug-and-play replacement and want components built to resist heat and corrosion under the hood, this harness provides a practical, warranty-backed option.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does this harness work on diesel engines?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. This Gledewen harness is for gasoline (petrol) engines only and is not compatible with diesel models.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Which OE part number does this replace?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: This harness replaces OEM part numbers 674-00923 and 67400923.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Gledewen","offers":[{"title":"Default Title","offer_id":48084096712862,"sku":"B0DKSQQ648","price":73.84,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/gledewen-front-packaging-wiring-harness.jpg?v=1785846306","url":"https:\/\/northtrailauto.ca\/products\/gledewen-electric-fan-wiring-harness-for-1999-2007-chevy-gmc-cadillac-dual-speed-relay-34-inch-radiator-fit","provider":"North Trail Auto","version":"1.0","type":"link"}