This GM Heater Vent Control Panel is the perfect addition to your 1970-72 Chevrolets. Made by General Motors, this vintage part has the manufacturer part number 3979700. It is a reliable and durable piece that will control the airflow in your car's heating system. The panel is designed for easy installation and use. It is a great replacement part for your car's heating system. This item is listed in the "Other Air Conditioning & Heating" category on eBay Motors. Buy now and enjoy a comfortable ride in your classic Chevrolet. Could use a good ceaning.