United Pacific Sequential LED Tail Lamp Set W/ Trim 1973-87 GM Truck Product Overview 56 Super bright red LED tail light with 12 LED white back-up light Features sequential operation with brake attention feature, and selector switch to turn off if desired Special tail light mounting base plate included Electronics completely sealed in epoxy to resist corrosion and moisture Requires use of United Pacific LED turn signal flasher, item number 90652 (Included)