ACDelco Professional Circuit Breaker is a high quality aftermarket replacement component for one or more of the following vehicle systems: cooling, hvac, ignition, starting and charging, body-electrical and lighting, wiper and washer, and/or engine fuel management. This premium aftermarket breaker is manufactured to meet or exceed your expectations for fit, form, and function. AC Delco circuit breaker’s built a reputation in the automotive industry for quality and craftmanship.