7L5533A226T Dual Electric Fan Upgrade Wiring Harness Kit for GM 1999-2006 ECU

Dual Electric Fan Wiring Harness Kit for GM 1999-2006

This dual electric fan wiring harness kit, part 7L5533A226T, connects two cooling fans to your ECU on 1999-2006 GM vehicles so the fans trigger automatically with engine demand.

Overview

This dual electric fan wiring harness kit gives 1999-2006 GM trucks and SUVs a clean way to run two electric cooling fans from the ECU. The 7L5533A226T harness carries relay control and fused power so both fans kick on together when coolant temperature or A/C demand calls for airflow. It suits DIY builders and shops converting a mechanical fan setup to electric fans.

Built For Performance

• Dual fan outputs let two electric fans run from one ECU-triggered harness
• Relay-based switching handles the high current draw of twin cooling fans
• Fused power circuit protects the fans and vehicle wiring from overload
• Pre-terminated connectors simplify install on 1999-2006 GM fan conversions
• ECU signal input allows fan activation based on temperature and A/C request

Fits These Machines

• for GM 1999-2006 trucks and SUVs using ECU-controlled electric fan conversions

On-The-Job Use

• Electric fan conversions on 1999-2006 GM pickups and SUVs
• Replacing worn or damaged fan harness wiring in a cooling system build
• Wiring dual fans to run automatically from the ECM instead of a manual switch

Specs At A Glance

Good To Know

Q: Does this harness control both fans automatically? A: Yes, it is built to run two electric fans from an ECU trigger on 1999-2006 GM vehicles. Fan activation depends on your ECM settings and sensor inputs.

Q: Can I install this on a truck that came with a mechanical fan? A: It is commonly used when converting a mechanical fan setup to dual electric fans on supported GM models. Confirm your ECM calibration supports electric fan control before ordering.

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