1968-1977 Chevy Corvette Heater Box Seal Exploded Parts Diagram

This document is a scanned exploded-view parts illustration labeled "68-77 Heater Box Seal," covering the heater box assembly used on 1968–1977 Chevrolet Corvettes. The line drawing shows the complete heater box and duct system disassembled into its individual components, arranged in exploded fashion: the firewall-mounted heater case halves, heater core with inlet/outlet tubes and grommets/seals, blower housing and scroll, mounting plates and gaskets, the long dash distribution duct with outlet vents and vent grilles, a transition duct/elbow, control levers and small hardware (screws, clips, springs), and various foam/rubber seals including a large pad-style seal and smaller sealing rings. No part numbers, callout numbers, or legend text are printed on this scan — the only text is the caption identifying the year range and subject. A reader can use this illustration to understand how the heater box, heater core, seals, ducts, and vent components fit together and in what order they assemble, which is useful when disassembling or rebuilding the heater system or replacing heater box seals on a 1968–1977 Corvette. The uploader filed it with a 1977 Corvette, which falls within the stated 68-77 range.