<div data-store-description="v1"> <p>1999–2006 Dual Electric Fan Upgrade Wiring Harness. Supplied product details follow.</p> <h3>Specifications and fitment</h3> </div> <p>Includes: - Dual Electric Fan Upgrade Wiring Harness</p> <p>Fits Models: - Chevrolet Silverado 1500 - Chevrolet Silverado 2500 - Chevrolet Silverado 3500 - GMC Sierra 1500 - GMC Sierra 2500 - GMC Sierra 3500</p> <p>Model Years: - 1999–2006</p> <p>Submodels: - Common trims include WT, LS, LT, and Denali - Chassis codes: GMT800, GMT900 - Body styles: Regular Cab, Extended Cab, Crew Cab</p> <p>Engine Options: - Common engine sizes: 4.3L V6, 4.8L V8, 5.3L V8, 6.0L V8, 8.1L V8 - Engine codes: L35, L59, LQ4, LQ9</p> <p>Description: This Dual Electric Fan Upgrade Wiring Harness is designed for seamless integration with 1999–2006 Chevrolet and GMC trucks. It enhances cooling efficiency by allowing for dual electric fans to operate effectively under ECU control, ensuring optimal engine temperature management.</p> <p>Features: - Direct fit for specified models - Supports dual fan operation - Improves engine cooling performance - Easy installation with factory connectors - Durable construction for long-lasting use</p>