SOURCE: 2003 escalade with on star
No diagram that I have lists a specific fuse for the display, but there is one tagged INFO. look st the fuses. In the lower right corner there are four fuses in a square pattern. Of those four, the INFO fuse is the upper left one, a 15 amp fuse. That seems to be the most likely one for your problem, if it is a fuse problem and not a failure due to a burned out display or a broken wire.
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