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#9
04-18-2026, 07:39 PM
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From the Corvette Forum;
The easiest was to ID the date of the radio is to examine the big output transistor (DS-501) on the back of the radio in the heat sink area (unless someone has changed it). There are four numbers on that transistor - first two are the year, last two are the week of the year. 7532- Transistor made first week of August (32nd week) of 1975. Which would make it a 76/77 model as HR said.
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Ed 1968 GTO (Thanks Mom) 2006 Silverado 2015 Chevy Express  2024 Cadillac LYRIQ 
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