How can you get under the hood of a 92 Buick Regal when the hood release cable is broken and you have tried exposing the wire with pliers but that was no good?

I had a similar problem on a 93 Regal. I took the plastic housing off where the hood release originally was and was able to get a grip on the release cable. The cable goes out of the cabin near the steering column so you might be able to back track from that point. I would spring for a new cable though as it is a real pain opening the hood with the pliers. I taped the new cable to the old one and snaked thru the engine compartment pretty easily. Good luck.