Connects2 CTSGM-48 Radio Replacement Module for Select GM Buick/GMC/Isuzu/Oldsmobile/Pontiac/Saturn Vehicles (2000-2012), Steering Wheel Control (SWC) Interface, Factory & Chime Retentions simplifies the installation of an aftermarket car stereo into a vehicle while preserving factory functions. Using this interface module has several functions: Retain all factory configured chimes (SAFETY and WARNING) such as low fuel warning, seatbelt warning and park assist (if equipped) When your factory radio is removed, your vehicle's Electronic Control Module (ECM) will store a fault code. This module will send the correct data to the Control Module, indicating a "Healthy" status so any dealership tools are not adversely affected during servicing. Provides a +12V switched accessory power source for your aftermarket radio.