Description: Sierra, silverado. 315 mhz. Sonic. Corvette. With 433mhz. Remote Control Door Lock Receiver Module. 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 allow the door to lock/unlock at the push of a button This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors