Changing out the chevy caprice heater core. . - YouTube
1971-1981 All Makes All Models Parts | H1944 | 1971-1980 Buick, Chevrolet, Pontiac, Oldsmobile; Heater Control Valve; with Air Conditioning | Classic Industries
For 1980-1990 Chevrolet Caprice Heater Valve 62878CY 1981 1982 1983 1984 1985 | eBay