A new OEM Delco General Motors Heater and/or Air Conditioning Vacuum Control Valve that I got at an auction of vintage car parts.  This is GM part no. 16037778 and Delco 15-71789.

This is for use on many 1980-90 Buick, Chevrolet, Oldsmobile, and Pontiac "B" Body cars.  I don't have a parts catalog for these years so you will have to verify if this is for your make/model/year/heat and AC system.

car auto automobile automotive classic 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 80 81 28 83 84 85 86 87 88 89 90