What is a MultiPlex kit?
MultiPlexing refers to the reduction in the number of wires inside the vehicle; in this case, from the mirror to the switches and systems that control the functions of the mirrors. Visiocorp supplies a MultiPlex kit (part number 1090) that consists of a driver side and passenger side harness. It is sold separately and is required for all MY2003+ Chevy, GMC, and Cadillac vehicles. Many competitor products do not have this kit, and therefore cannot be fitted to these models. The harness connects the electrical functions of the mirror to the vehicle’s control switches.