Jon Neighbors

Just got into this and have been doing some research and found a bulletin from 4/21/18 for the third brake light on caps. It list options for both having and not having the in bed lighting. It also states that for beds without the lighting to order Wire Harness - GM (23327843) and use this to complete the installation. I believe this is the harness most of us have been trying to track down. I think I am going to order one and see if it plugs and plays with the harness then connect it to a set of LED light strips on the underside of each rail. https://www.gmupfitter.com/files/media/photo/920/UI Bulletin_122b.pdf UI%20Bulletin_122b.pdf