Description: Side object sensing module. ATS. Sedan, labeled 23257304. Sedan, with v. With v-series. Labeled 84087756. This part requires programming and/or special setup procedures GM Service Information describes the procedures and special tools needed to ensure proper operation in the vehicle Designed to translate various signals to trigger alerts of nearby objects This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors