RetroRadio Head Unit for 1973–87 GMC K5 Jimmy — AM/FM HD, Bluetooth 5.0, SiriusXM-Ready, 2 USB (LB-M4-116-37-73G)

Factory-fit replacement for 1973–1987 GMC K5 Jimmy vehicles that adds modern audio features while retaining a modular mounting design. Assembly required. Includes an AM/FM tuner with 30 presets and HD capability, plus built-in Bluetooth (Version 5.0) for wireless audio and hands-free use. Connectivity includes 2 USB ports and a dedicated subwoofer output. SiriusXM-Ready® (SXV300V1 tuner sold separately). Power comes from an integrated Mosfet amplifier rated at 300-watt (peak power).