Is there a fuse that would cause a 1994 Pontiac Bonneville not to start or crank?

Yes, it is possible. If you have checked all fuses in the dash and they are ok, try looking for a fuse panel under the hood in the engine compartment. There's been known to be ignition fuses in those panels in the engine compartment (if it is equipped with the engine compartment fuse panel). Otherwise, check starter relay, ignition wires near starter relay, ground wires, or even the ignition cylinder (where the ignition key goes), it may not be getting a good connection and could be wore out.