1954 GMC production is series "Z", Y is 55 2nd, X is 56, T is 57 and S is 58/59.
The application for the part number you provided, 2233480, shows:
22.1480 - Radio
Series STXY (55-59) Models 100-670 conventional cab * 340-550 COE * F650
12 volt radio (replaces 2233398)
We were golden to the last line. :confused: "replaces 2233398"
That seems to me to indicate that this radio will fit 54-59 and I don't believe that the '54/'55 radio will fit the '55-'59 trucks, but GMC's Master Parts book tells me it does. If this is correct, then there ain't no such thang as a one year radio for 12V users any more!
Now we need to solve the mystery. Who knows whether or not a '55-'59 GMC radio will fit :confused: a '54/'55?
