For 1999–2006 Chevy GM Electric Dual Fan Upgrade Wiring Harness Kit ECU Control

Electric Dual Fan Wiring Harness Kit with ECU Control for Chevy GM

This electric dual fan wiring harness kit with ECU control is a relay-driven harness for Chevy GM vehicles, letting the engine computer trigger twin cooling fans automatically based on temperature signals.

Overview

This electric dual fan wiring harness kit gives Chevy GM vehicles a clean way to run two electric cooling fans under ECU control. The harness routes power through relays and connects to the computer so the fans switch on and off with engine temperature instead of a manual toggle. It suits LS swaps, restomods, and stock builds converting from a mechanical fan to electric dual fans.

Built For Performance

• Controls two electric cooling fans from a single harness
• ECU-triggered relay switching for automatic fan operation
• Pre-terminated leads sized for fan current draw
• Designed to integrate with factory or swap ECU fan outputs
• Insulated wiring suited to underhood heat and vibration

Fits These Machines

• for Chevy GM vehicles from 1999 to 2006
• for Chevy GM LS swap builds with electric fan conversions

On-The-Job Use

• Converting a mechanical fan setup to electric dual fans
• LS engine swaps needing ECU-controlled fan operation
• Restomod and street builds updating the cooling system
• Replacing a damaged or hacked factory fan harness

Specs At A Glance

Good To Know

Q: Can this harness run the fans without an ECU signal? A: It is built around ECU-triggered relay control, so it needs a fan output or signal from the computer or a controller to switch the fans. Check your ECU has a usable fan trigger before ordering.

Q: Does this kit include the cooling fans themselves? A: This listing covers the wiring harness kit for controlling dual electric fans, not the fan assemblies. Match the harness to your fan current draw and connector style.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.