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On zip corvette there are two different sizes for the bulb sockets that go into the instrument cluster and speedo cluster. They are 1/2” and 5/8”. I have a 1981 Corvette and cant tell which socket size I need to fit my instrument cluster. What size socket do I need?
While u r in there you should replace the printed circuit boards and sockets and replace the bulbs with led. It will be a much brighter and easier to read cluster. I did it on my 79 and it is beautiful!
Gauge cluster bulb socket size
