The SP-0727 neutral safety switch and reverse light output module provides an easy 6-wire hookup. The SP-0727 interprets the gear position of the transmission via CANbus. The module then provides a ground output control for a starter relay to prevent the vehicle from starting in gear. This module is also equipped with an optional reverse light output (-) signal for a reverse light relay. For use with 6L/8L/10L GM transmissions.