Check the listing for details. 1999-06 Silverado Sierra Tahoe OEM Electric Fan Conversion Kit Factory Harness. Condition: Used. Listed at 169.99 USD. Popular upgrade for 99-06 Chevy/GMC Trucks and SUVs with Clutch Fan Setup. You are looking at a Factory Chevrolet Silverado/Tahoe/Suburban Electric Fan Conversion Harness. This setup will help eliminate AC problems at idle and help keep your modified truck cooler, while freeing up some extra horsepower. I pull these myself and try to keep the wiring as intact as possible. Occasionally, I'll have to cut and resolder wires. On larger wires I use 3M waterproof crimp connectors. The wiring harness is the full length harness out of the vehicle. Included: OEM Fan Harness with ConnectorsPopulated Fan Module with fuses and relaysOEM Full Length Wiring with 2 Terminal Pins to connect to your Computer/ECM Fits most GMT800 series vehicles including 99-06 Silverados/Sierras that have the 4.3/4.8/5.3 Vortec Motors.Also fits similar year Tahoes, Suburbans, Yukons, Escalades, Avalanches etc. You will need: Cooling Fan34" Core Radiator Installed. Core measures the aluminum part, not end to end. 34" Core radiator measures about 40" end to end.Your Computer/ECM reflashed to turn on the electric fan feature To research how to install. Easy google search. Lots of information on this.