I'm trying to change out a key start, solenoid-starter-type ignition switch. It appears to be the stock 1952 GMC switch and I can't figure out the correct formula to remove the lock cylinder which needs to come out first before removing the switch bezel and hence the switch. There are 2 holes in the lock face to insert wires, drill bits, etc. My GMC shop manual gives no removal instructions and Chevy instructions haven't worked so far. Any suggestions on the proper removal sequence would be greatly appreciated! Thanks.

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