Fan Harness for Silverado PWM Style Fans – WARR Performance 58-0053

This fan harness works with the Bosch PWM fans found on Silverado and other full-size GM trucks from about 2016-20.  The part numbers known to work are 885565556 and 85565557.  GM moved to LIN controlled fans around 2020, so we recommend against buying other part numbers unless you’re positive that they’re PWM controlled.  The power leads are 4′ and the PWM wire is 6′ long.