There should be a switch on the floor to the left of the brake pedal. Step on it with your foot to turn on the high beams. Step on it again to turn them off.
Yes, as EdS2K says, a switch on the floor to press with your foot.
Looking for a Used Caprice in your area?
CarGurus has 1 nationwide Caprice listings and the tools to find you a great deal.
Search Chevrolet Caprice Questions
Chevrolet Caprice Experts