Key Parts Heater Boxes

Key Parts offers replacement heater boxes for a variety of Chevrolet and GMC trucks from the 1960s and '70s. Fabricated from steel with a protective black finish, the boxes serve as the firewall-side housing (heater core case) for heating systems, replacing rusted or damaged original units with a direct-fit, reproduction assembly. These parts contain the outer housing, typically with air doors/vents (depending on specific kit) that manage airflow from the heater core.