91 Buick LeSabre-heater/AC control lights?

The bulbs have burned out that light up the heater/AC controls. There is no bulb# listed for replacement in the owners manual, and there seems to be no
way to remove the bulbs from the sockets! They are about 1/4" dia and seem to have their wire leads crimped into the socket. Anyone know of a way to replace these bulbs?
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