Fab Fours Heavy Duty Rear Bumper Model CS14-W3151-1Fab Fours Heavy Duty Rear Bumper Model CS14 W3151 1 The Fab Fours' 2014 to 2015 GM 1500 sensor winch bumper focuses on strength, durability and safety. A redesigned center section and 4 integrated sensor holes that work with the factory park assist system and compatible with the OEM sensor housings gives Fab Fours the first fully functioning front steel sensor winch bumper. Key features include the integrated fog and turn lights, air ducts, D ring