The AC Delco Code Retrieval Key is a diagnostic tool specifically designed for GM models. It is capable of retrieving troubled codes from the ALDL system and is compatible with passenger vehicles. Made by AC Delco, a trusted brand in automotive parts, this key allows for easy access to vehicle codes for efficient troubleshooting and maintenance. Manufactured in the United States, this OBD interface tool is a reliable and convenient solution for any GM vehicle owner looking to diagnose and fix issues with their vehicle's system.