A radio in 1941 was not installed at the Chevrolet factory. They were installed by the dealer. About one third of the 1941 Chevrolet cars were sold without a radio. A car radio was still considered a luxery by many folks. Chevrolet offered the three approved accessory radios in 1941, the non-push buttom for $24.95, a standard push button for $49,95, a combination standard and short wave for $64.50, (not common).
Then other brands made radios to custom fit into the 1941 instrument panel, the Motorola being the most popular (it did not have GMs blessings). There were srveral other afer market brands available and even Sears Roebuck offerd one, After all there were a million 1941 Chevrolets made so was a large market out there for folks decided later they wanted a radio after all.
All GM cars were 12 volt by 1955 and other brands by 1956 so that pretty well reduced the demand for 6 volt radios in cars although there were still some 1953 and 1954 owners wanting to install a radio in their one or two year old non-radio equipped car,
1958 was the first year a dealer could order a radio equipped car from the factory.
The first year an AM-FM rado was offered by Chevrolet was 1963 and for the full sized cars only
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