ACDelco D1587A GM Original Equipment Instrument Panel Dimmer and Interior Lamp Switch Work with vehicle electronics to help optimize vehicle capabilities Variety of switches, including: door lock, turn signal, ignition, trunk, and windshield wiper switches all engineered to meet GM specific designs for fit, form, and function GM-recommended replacement part for your GM vehicles original factory component Offering the quality, reliability, and durability of GM OE Manufactured to GM OE specification for fit, form, and function