Is an orginal radio from a 1953 GMC the same as a Chevy? I under stood the GMC to be positive ground and the Chevy negative however the part number for the radio is the same 986443. I found a straight back radio which I believe to be a 986443 radio but the desplay says GMC.Thank you for any help.

1953 Chevy 3100
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53Chevy 3100
1953 Mack Firetruck
1972 Porsche 911
1986 Honda Goldwing