Image 1 of 4 Image 2 of 4 Image 3 of 4 Image 4 of 4 Chevrolet Truck 216 235 261 thermostat base water neck GM #839232 1940 1941 1942 1947 1948 1949 1950 1951 1952 1953 1954 1955 $14.95 sold out Chevrolet Truck 216 235 261 thermostat water neck base, good used, no rust, original GM #839232 works on 1940-1955 engines. Sold Out Added! Chevrolet Truck 216 235 261 thermostat water neck base, good used, no rust, original GM #839232 works on 1940-1955 engines.