ACDelco D6212E GM Original Equipment Turn Signal and Headlamp Dimmer Switch Collaborate with vehicle electronics to optimize engine performance 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 Manufactured to GM OE specification for fit, form, and function, so it is a GM-recommended replacement part for your GM vehicles original factory component