This wiring harness kit converts the front lights on your 2015 style gm tow mirrors into dual functioning signal and running lights.
Dual function gm tow mirrors.
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Fitting silverado and sierra 1500 2500 3500 including duramax.
This video details how to get the white rear facing light to dual function as reverse and cargo.
This harness is compatible with boost auto parts mirrors as well as many other competitors.
1988 1998 gm tow mirrors from 248 55 1999 2002 gm tow mirrors from 259 55.
Installation requires one wire to be ran to a power feed that is switched on with the running lights.