HOKZVIATMOTOELECS Dual-Speed Electric Fan Wiring Harness for Chevy/GMC 34" Radiator — OEM-fit, Heat/Oil-Resistant

The 674-00923 Dual Speed Electric Fan Control Wiring Harness Kit by HOKZVIATMOTOELECS provides a drop-in electrical connection to run a two-speed stand-alone radiator fan on select Chevy and GMC trucks and SUVs.

This harness is built to replace or upgrade the factory wiring when installing a separate electric fan assembly on compatible vehicles. It’s engineered to meet OEM fit and function, using heat- and oil-resistant materials and factory-tested terminals for reliable electrical continuity. Before ordering, confirm your vehicle model and radiator width—this kit is intended specifically for vehicles with a 34-inch radiator.

Which vehicles will this harness fit?

The wiring kit is designed for a range of GM full-size trucks and SUVs that originally used a stand-alone electric fan arrangement. It fits late-model Chevy Silverado, Avalanche, Suburban, Tahoe and GMC Sierra and Yukon models listed by the manufacturer. Always match connector styles and radiator width to ensure compatibility.

• Compatible models: Chevy Silverado, Avalanche, Suburban, Tahoe; GMC Sierra, Yukon
• Designed for vehicles requiring a separate electric fan control harness
• Intended for applications with a 34-inch radiator width

How does this dual-speed harness improve a fan installation?

This harness offers a purpose-built wiring path for a two-speed electric fan, simplifying installation and reducing electrical troubleshooting. Its terminals are factory-tested for continuity and resistance to heat and oil, which helps protect the connection points under engine-bay conditions. The result is a cleaner, OEM-style electrical interface compared with ad-hoc splices or generic wire kits.

• Two-speed control wiring preconfigured for fan motor operation
• Factory-tested terminals for reliable electrical contact
• Heat- and oil-resistant materials for engine-bay durability

What should I check before buying this harness?

Confirm vehicle make, model year, and whether the original system used a stand-alone electric fan. Measure the radiator width—this kit fits radiators that are 34 inches wide; different radiator sizes require alternate harnesses or bracketry. Also inspect the connector shapes and mounting points to verify they match your fan and vehicle harness layout.

• Verify exact vehicle model and factory fan configuration
• Measure radiator width—kit is for 34-inch radiators only
• Compare connector types and mounting locations before installation

What level of quality and support does HOKZVIATMOTOELECS offer?

The harness is built to meet or exceed OEM standards, using premium wire insulation and terminals rated for automotive heat and oil exposure. Each assembly is manufactured to specification and tested for electrical continuity. The product includes a 12-month support period, and customer service is available for fitment or installation questions.

• OEM-level materials and construction for long-term reliability
• Factory-tested wiring and terminals for consistent performance
• 12-month warranty and responsive customer support

Who is this for? This wiring harness is intended for owners, mechanics, and installers fitting a two-speed stand-alone electric radiator fan to compatible Chevy Silverado, Avalanche, Suburban, Tahoe and GMC Sierra or Yukon vehicles with a 34-inch radiator. It’s a good choice for those seeking an OEM-style harness to simplify wiring, improve reliability, and avoid custom splicing. If your vehicle uses a different radiator width or a different fan arrangement, consult fitment guides or contact support for the correct harness option.