Chevy heater control valves are available at eBay and Eckler's Classic Chevys, as of 2015. EBay's listings include valves for 1955 and 1956 Chevy vehicles. Eckler's Classic Chevys offers a wide range of heater control valves, including for the 1955 to 1957 Chevy Bel Air.
Eckler's Classic Chevys offers Chevy parts for early and full-size vehicles from 1949 through 1972 and for Chevy trucks from 1947 to 1992. Experts are available to assist customers, and customers can search the Eckler's website for parts by brand and price range. The company is based in Titusville, Florida and has been in business for more than 50 years.