Sold as a set (kit covers both sides). This wiring kit adds the missing wires to your GM door harness for upgrading from small mirrors to towing mirrors. This gets ALL of the circuits including power folding to properly function so the mirrors can work plug and play without running additional wires into the cab. Why spend $200+ on replacing your door harnesses when you can just add the missing wires for a fraction of the price?
This upgrade will work for OEM mirrors (RPO code DQS or DPN), Boost Auto (if the plug and play option is selected), and any aftermarket mirrors that properly wire all of the wires into the OEM style connector.
Link to installation video: https://youtu.be/74yND-l8xwQ