ACDelco 16199583 GM Original Equipment Radio Volume Control Knob Radios vary based on your vehicle, trim selection, or upgrade options. Make sure to check part note information for the correct option configuration on your vehicle. For example, Notes: STEREO CASSETTE (UM6) would designate a radio that has a cassette deck with vehicle option code of UM6. The option content of a vehicle is typically located in the glove box or the bottom side of the spare tire cover. ACDelco offers the exact GM OE color and finish code, making it a perfect match for the surrounding knobs and painted finishes 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